2023-02-26 01:30

lit-element-starter-ts/.eleventy.cjs

@@ -0,0 +1,21 @@
+const syntaxHighlight = require('@11ty/eleventy-plugin-syntaxhighlight');
+
+module.exports = function (eleventyConfig) {
+  eleventyConfig.addPlugin(syntaxHighlight);
+  eleventyConfig.addPassthroughCopy('docs-src/docs.css');
+  eleventyConfig.addPassthroughCopy('docs-src/.nojekyll');
+  eleventyConfig.addPassthroughCopy(
+    'node_modules/@webcomponents/webcomponentsjs'
+  );
+  eleventyConfig.addPassthroughCopy('node_modules/lit/polyfill-support.js');
+  return {
+    dir: {
+      input: 'docs-src',
+      output: 'docs',
+    },
+    templateExtensionAliases: {
+      '11ty.cjs': '11ty.js',
+      '11tydata.cjs': '11tydata.js',
+    },
+  };
+};

lit-element-starter-ts/.eslintignore

@@ -0,0 +1,5 @@
+node_modules/*
+docs/*
+docs-src/*
+rollup-config.js
+custom-elements.json

lit-element-starter-ts/.eslintrc.json

@@ -0,0 +1,51 @@
+{
+  "root": true,
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/eslint-recommended",
+    "plugin:@typescript-eslint/recommended"
+  ],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": 2020,
+    "sourceType": "module"
+  },
+  "plugins": ["@typescript-eslint"],
+  "env": {
+    "browser": true
+  },
+  "rules": {
+    "no-prototype-builtins": "off",
+    "@typescript-eslint/ban-types": "off",
+    "@typescript-eslint/explicit-function-return-type": "off",
+    "@typescript-eslint/explicit-module-boundary-types": "off",
+    "@typescript-eslint/no-explicit-any": "error",
+    "@typescript-eslint/no-empty-function": "off",
+    "@typescript-eslint/no-non-null-assertion": "off",
+    "@typescript-eslint/no-unused-vars": [
+      "warn",
+      {
+        "argsIgnorePattern": "^_"
+      }
+    ]
+  },
+  "overrides": [
+    {
+      "files": ["rollup.config.js", "web-test-runner.config.js"],
+      "env": {
+        "node": true
+      }
+    },
+    {
+      "files": [
+        "*_test.ts",
+        "**/custom_typings/*.ts",
+        "packages/lit-ssr/src/test/integration/tests/**",
+        "packages/lit-ssr/src/lib/util/parse5-utils.ts"
+      ],
+      "rules": {
+        "@typescript-eslint/no-explicit-any": "off"
+      }
+    }
+  ]
+}

lit-element-starter-ts/.gitignore

@@ -0,0 +1,9 @@
+node_modules/
+/lib/
+/test/
+custom-elements.json
+# top level source
+my-element.js
+my-element.js.map
+my-element.d.ts
+my-element.d.ts.map

lit-element-starter-ts/.prettierrc.json

@@ -0,0 +1,7 @@
+{
+  "trailingComma": "es5",
+  "tabWidth": 2,
+  "singleQuote": true,
+  "bracketSpacing": false,
+  "arrowParens": "always"
+}

lit-element-starter-ts/.vscode/extensions.json

@@ -0,0 +1,9 @@
+{
+  // See https://go.microsoft.com/fwlink/?LinkId=827846 to learn about workspace recommendations.
+  // Extension identifier format: ${publisher}.${name}. Example: vscode.csharp
+
+  // List of extensions which should be recommended for users of this workspace.
+  "recommendations": ["runem.lit-plugin"],
+  // List of extensions recommended by VS Code that should not be recommended for users of this workspace.
+  "unwantedRecommendations": []
+}

lit-element-starter-ts/LICENSE

@@ -0,0 +1,28 @@
+BSD 3-Clause License
+
+Copyright (c) 2019 Google LLC. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

lit-element-starter-ts/README.md

@@ -0,0 +1,123 @@
+# LitElement TypeScript starter
+
+This project includes a sample component using LitElement with TypeScript.
+
+## Setup
+
+Install dependencies:
+
+```bash
+npm i
+```
+
+## Build
+
+This sample uses the TypeScript compiler to produce JavaScript that runs in modern browsers.
+
+To build the JavaScript version of your component:
+
+```bash
+npm run build
+```
+
+To watch files and rebuild when the files are modified, run the following command in a separate shell:
+
+```bash
+npm run build:watch
+```
+
+Both the TypeScript compiler and lit-analyzer are configured to be very strict. You may want to change `tsconfig.json` to make them less strict.
+
+## Testing
+
+This sample uses modern-web.dev's
+[@web/test-runner](https://www.npmjs.com/package/@web/test-runner) along with
+Mocha, Chai, and some related helpers for testing. See the
+[modern-web.dev testing documentation](https://modern-web.dev/docs/test-runner/overview) for
+more information.
+
+Tests can be run with the `test` script:
+
+```bash
+npm test
+```
+
+## Dev Server
+
+This sample uses modern-web.dev's [@web/dev-server](https://www.npmjs.com/package/@web/dev-server) for previewing the project without additional build steps. Web Dev Server handles resolving Node-style "bare" import specifiers, which aren't supported in browsers. It also automatically transpiles JavaScript and adds polyfills to support older browsers. See [modern-web.dev's Web Dev Server documentation](https://modern-web.dev/docs/dev-server/overview/) for more information.
+
+To run the dev server and open the project in a new browser tab:
+
+```bash
+npm run serve
+```
+
+There is a development HTML file located at `/dev/index.html` that you can view at http://localhost:8000/dev/index.html.
+
+## Editing
+
+If you use VS Code, we highly recommend the [lit-plugin extension](https://marketplace.visualstudio.com/items?itemName=runem.lit-plugin), which enables some extremely useful features for lit-html templates:
+
+- Syntax highlighting
+- Type-checking
+- Code completion
+- Hover-over docs
+- Jump to definition
+- Linting
+- Quick Fixes
+
+The project is setup to recommend lit-plugin to VS Code users if they don't already have it installed.
+
+## Linting
+
+Linting of TypeScript files is provided by [ESLint](eslint.org) and [TypeScript ESLint](https://github.com/typescript-eslint/typescript-eslint). In addition, [lit-analyzer](https://www.npmjs.com/package/lit-analyzer) is used to type-check and lint lit-html templates with the same engine and rules as lit-plugin.
+
+The rules are mostly the recommended rules from each project, but some have been turned off to make LitElement usage easier. The recommended rules are pretty strict, so you may want to relax them by editing `.eslintrc.json` and `tsconfig.json`.
+
+To lint the project run:
+
+```bash
+npm run lint
+```
+
+## Formatting
+
+[Prettier](https://prettier.io/) is used for code formatting. It has been pre-configured according to the Polymer Project's style. You can change this in `.prettierrc.json`.
+
+Prettier has not been configured to run when committing files, but this can be added with Husky and and `pretty-quick`. See the [prettier.io](https://prettier.io/) site for instructions.
+
+## Static Site
+
+This project includes a simple website generated with the [eleventy](11ty.dev) static site generator and the templates and pages in `/docs-src`. The site is generated to `/docs` and intended to be checked in so that GitHub pages can serve the site [from `/docs` on the master branch](https://help.github.com/en/github/working-with-github-pages/configuring-a-publishing-source-for-your-github-pages-site).
+
+To enable the site go to the GitHub settings and change the GitHub Pages &quot;Source&quot; setting to &quot;master branch /docs folder&quot;.</p>
+
+To build the site, run:
+
+```bash
+npm run docs
+```
+
+To serve the site locally, run:
+
+```bash
+npm run docs:serve
+```
+
+To watch the site files, and re-build automatically, run:
+
+```bash
+npm run docs:watch
+```
+
+The site will usually be served at http://localhost:8000.
+
+## Bundling and minification
+
+This starter project doesn't include any build-time optimizations like bundling or minification. We recommend publishing components as unoptimized JavaScript modules, and performing build-time optimizations at the application level. This gives build tools the best chance to deduplicate code, remove dead code, and so on.
+
+For information on building application projects that include LitElement components, see [Build for production](https://lit.dev/docs/tools/production/) on the Lit site.
+
+## More information
+
+See [Get started](https://lit.dev/docs/getting-started/) on the Lit site for more information.

lit-element-starter-ts/dev/README.md

@@ -0,0 +1 @@
+This directory contains HTML files containing your element for development. By running `npm run build:watch` and `npm run serve` you can edit and see changes without bundling.

lit-element-starter-ts/dev/index.html

@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>&lt;my-element> Demo</title>
+    <script src="../node_modules/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script>
+    <script src="../node_modules/lit/polyfill-support.js"></script>
+    <script type="module" src="../my-element.js"></script>
+    <style>
+      p {
+        border: solid 1px blue;
+        padding: 8px;
+      }
+    </style>
+  </head>
+  <body>
+    <my-element>
+      <p>This is child content</p>
+    </my-element>
+  </body>
+</html>

lit-element-starter-ts/docs-src/.eleventyignore

@@ -0,0 +1,2 @@
+# Ignore files with a leading underscore; useful for e.g. readmes in source documentation
+_*.md

lit-element-starter-ts/docs-src/_README.md

@@ -0,0 +1,7 @@
+This directory contains the sources for the static site contained in the /docs/ directory. The site is based on the [eleventy](11ty.dev) static site generator.
+
+The site is intended to be used with GitHub pages. To enable the site go to the GitHub settings and change the GitHub Pages "Source" setting to "master branch /docs folder".
+
+To view the site locally, run `npm run docs:serve`.
+
+To edit the site, add to or edit the files in this directory then run `npm run docs` to build the site. The built files must be checked in and pushed to GitHub to appear on GitHub pages.

lit-element-starter-ts/docs-src/_data/api.11tydata.js

@@ -0,0 +1,16 @@
+/**
+ * @license
+ * Copyright 2021 Google LLC
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+const fs = require('fs');
+
+module.exports = () => {
+  const customElements = JSON.parse(
+    fs.readFileSync('custom-elements.json', 'utf-8')
+  );
+  return {
+    customElements,
+  };
+};

lit-element-starter-ts/docs-src/_includes/example.11ty.cjs

@@ -0,0 +1,43 @@
+const page = require('./page.11ty.cjs');
+const relative = require('./relative-path.cjs');
+
+/**
+ * This template extends the page template and adds an examples list.
+ */
+module.exports = function (data) {
+  return page({
+    ...data,
+    content: renderExample(data),
+  });
+};
+
+const renderExample = ({name, content, collections, page}) => {
+  return `
+    <h1>Example: ${name}</h1>
+    <section class="examples">
+      <nav class="collection">
+        <ul>
+          ${
+            collections.example === undefined
+              ? ''
+              : collections.example
+                  .map(
+                    (post) => `
+                  <li class=${post.url === page.url ? 'selected' : ''}>
+                    <a href="${relative(
+                      page.url,
+                      post.url
+                    )}">${post.data.description.replace('<', '&lt;')}</a>
+                  </li>
+                `
+                  )
+                  .join('')
+          }
+        </ul>
+      </nav>
+      <div>
+        ${content}
+      </div>
+    </section>
+  `;
+};

lit-element-starter-ts/docs-src/_includes/footer.11ty.cjs

@@ -0,0 +1,9 @@
+module.exports = function (data) {
+  return `
+<footer>
+  <p>
+    Made with
+    <a href="https://github.com/PolymerLabs/lit-starter-ts">lit-starter-ts</a>
+  </p>
+</footer>`;
+};

lit-element-starter-ts/docs-src/_includes/header.11ty.cjs

@@ -0,0 +1,7 @@
+module.exports = function (data) {
+  return `
+<header>
+  <h1>&lt;my-element></h1>
+  <h2>A web component just for me.</h2>
+</header>`;
+};

lit-element-starter-ts/docs-src/_includes/nav.11ty.cjs

@@ -0,0 +1,11 @@
+const relative = require('./relative-path.cjs');
+
+module.exports = function ({page}) {
+  return `
+<nav>
+  <a href="${relative(page.url, '/')}">Home</a>
+  <a href="${relative(page.url, '/examples/')}">Examples</a>
+  <a href="${relative(page.url, '/api/')}">API</a>
+  <a href="${relative(page.url, '/install/')}">Install</a>
+</nav>`;
+};

lit-element-starter-ts/docs-src/_includes/page.11ty.cjs

@@ -0,0 +1,37 @@
+const header = require('./header.11ty.cjs');
+const footer = require('./footer.11ty.cjs');
+const nav = require('./nav.11ty.cjs');
+const relative = require('./relative-path.cjs');
+
+module.exports = function (data) {
+  const {title, page, content} = data;
+  return `
+<!doctype html>
+
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>${title}</title>
+    <link rel="stylesheet" href="${relative(page.url, '/docs.css')}">
+    <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:300,400,600|Roboto+Mono">
+    <link href="${relative(page.url, '/prism-okaidia.css')}" rel="stylesheet" />
+    <script src="/node_modules/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script>
+    <script src="/node_modules/lit/polyfill-support.js"></script>
+    <script type="module" src="${relative(
+      page.url,
+      '/my-element.bundled.js'
+    )}"></script>
+  </head>
+  <body>
+    ${header()}
+    ${nav(data)}
+    <div id="main-wrapper">
+      <main>
+        ${content}
+      </main>
+    </div>
+    ${footer()}
+  </body>
+</html>`;
+};

lit-element-starter-ts/docs-src/_includes/relative-path.cjs

@@ -0,0 +1,9 @@
+const path = require('path').posix;
+
+module.exports = (base, p) => {
+  const relativePath = path.relative(base, p);
+  if (p.endsWith('/') && !relativePath.endsWith('/') && relativePath !== '') {
+    return relativePath + '/';
+  }
+  return relativePath;
+};

lit-element-starter-ts/docs-src/api.11ty.cjs

@@ -0,0 +1,90 @@
+/**
+ * This page generates its content from the custom-element.json file as read by
+ * the _data/api.11tydata.js script.
+ */
+module.exports = class Docs {
+  data() {
+    return {
+      layout: 'page.11ty.cjs',
+      title: '<my-element> ⌲ Docs',
+    };
+  }
+
+  render(data) {
+    const customElements = data.api['11tydata'].customElements;
+    const tags = customElements.tags;
+    return `
+      <h1>API</h1>
+      ${tags
+        .map(
+          (tag) => `
+        <h2>&lt;${tag.name}></h2>
+        <div>
+          ${tag.description}
+        </div>
+        ${renderTable(
+          'Attributes',
+          ['name', 'description', 'type', 'default'],
+          tag.attributes
+        )}
+        ${renderTable(
+          'Properties',
+          ['name', 'attribute', 'description', 'type', 'default'],
+          tag.properties
+        )}  
+        ${
+          /*
+           * Methods are not output by web-component-analyzer yet (a bug), so
+           * this is a placeholder so that at least _something_ will be output
+           * when that is fixed, and element maintainers will hopefully have a
+           * signal to update this file to add the neccessary columns.
+           */
+          renderTable('Methods', ['name', 'description'], tag.methods)
+        }
+        ${renderTable('Events', ['name', 'description'], tag.events)}    
+        ${renderTable('Slots', ['name', 'description'], tag.slots)}  
+        ${renderTable(
+          'CSS Shadow Parts',
+          ['name', 'description'],
+          tag.cssParts
+        )}
+        ${renderTable(
+          'CSS Custom Properties',
+          ['name', 'description'],
+          tag.cssProperties
+        )}
+        `
+        )
+        .join('')}
+    `;
+  }
+};
+
+/**
+ * Renders a table of data, plucking the given properties from each item in
+ * `data`.
+ */
+const renderTable = (name, properties, data) => {
+  if (data === undefined) {
+    return '';
+  }
+  return `
+    <h3>${name}</h3>
+    <table>
+      <tr>
+        ${properties.map((p) => `<th>${capitalize(p)}</th>`).join('')}
+      </tr>
+      ${data
+        .map(
+          (i) => `
+        <tr>
+          ${properties.map((p) => `<td>${i[p]}</td>`).join('')}
+        </tr>
+      `
+        )
+        .join('')}
+    </table>
+  `;
+};
+
+const capitalize = (s) => s[0].toUpperCase() + s.substring(1);

lit-element-starter-ts/docs-src/docs.css

@@ -0,0 +1,162 @@
+* {
+  box-sizing: border-box;
+}
+
+body {
+  margin: 0;
+  color: #333;
+  font-family: 'Open Sans', arial, sans-serif;
+  min-width: min-content;
+  min-height: 100vh;
+  font-size: 18px;
+  display: flex;
+  flex-direction: column;
+  align-items: stretch;
+}
+
+#main-wrapper {
+  flex-grow: 1;
+}
+
+main {
+  max-width: 1024px;
+  margin: 0 auto;
+}
+
+a:visited {
+  color: inherit;
+}
+
+header {
+  width: 100%;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  height: 360px;
+  margin: 0;
+  background: linear-gradient(0deg, rgba(9,9,121,1) 0%, rgba(0,212,255,1) 100%);
+  color: white;
+}
+
+footer {
+  width: 100%;
+  min-height: 120px;
+  background: gray;
+  color: white;
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+  padding: 12px;
+  margin-top: 64px;
+}
+
+h1 {
+  font-size: 2.5em;
+  font-weight: 400;
+}
+
+h2 {
+  font-size: 1.6em;
+  font-weight: 300;
+  margin: 64px 0 12px;
+}
+
+h3 {
+  font-weight: 300;
+}
+
+header h1 {
+  width: auto;
+  font-size: 2.8em;
+  margin: 0;
+}
+
+header h2 {
+  width: auto;
+  margin: 0;
+}
+
+nav {
+  display: grid;
+  width: 100%;
+  max-width: 100%;
+  grid-template-columns: repeat(auto-fit, 240px);
+  justify-content: center;
+  border-bottom: 1px solid #efefef;
+}
+
+nav > a {
+  color: #444;
+  display: block;
+  flex: 1;
+  font-size: 18px;
+  padding: 20px 0;
+  text-align: center;
+  text-decoration: none;
+}
+
+nav > a:hover {
+  text-decoration: underline;
+}
+
+nav.collection {
+  border: none;
+}
+
+nav.collection > ul {
+  padding: 0;
+  list-style: none;
+}
+
+nav.collection > ul > li {
+  padding: 4px 0;
+}
+
+nav.collection > ul > li.selected {
+  font-weight: 600;
+}
+
+nav.collection a {
+  text-decoration: none;
+}
+
+nav.collection a:hover {
+  text-decoration: underline;
+}
+
+section.columns {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(400px, 488px));
+  grid-gap: 48px;
+  justify-content: center;
+}
+
+section.columns > div {
+  flex: 1;
+}
+
+section.examples {
+  display: grid;
+  grid-template-columns: 240px minmax(400px, 784px);
+  grid-gap: 48px;
+  justify-content: center;
+}
+
+section.examples h2:first-of-type {
+  margin-top: 0;
+}
+
+table {
+  width: 100%;
+  border-collapse: collapse;
+}
+th {
+  font-weight: 600;
+}
+
+td, th {
+  border: solid 1px #aaa;
+  padding: 4px;
+  text-align: left;
+}

lit-element-starter-ts/docs-src/examples/index.md

@@ -0,0 +1,34 @@
+---
+layout: example.11ty.cjs
+title: <my-element> ⌲ Examples ⌲ Basic
+tags: example
+name: Basic
+description: A basic example
+---
+
+<style>
+  my-element p {
+    border: solid 1px blue;
+    padding: 8px;
+  }
+</style>
+<my-element>
+  <p>This is child content</p>
+</my-element>
+
+<h3>CSS</h3>
+
+```css
+p {
+  border: solid 1px blue;
+  padding: 8px;
+}
+```
+
+<h3>HTML</h3>
+
+```html
+<my-element>
+  <p>This is child content</p>
+</my-element>
+```

lit-element-starter-ts/docs-src/examples/name-property.md

@@ -0,0 +1,15 @@
+---
+layout: example.11ty.cjs
+title: <my-element> ⌲ Examples ⌲ Name Property
+tags: example
+name: Name Property
+description: Setting the name property
+---
+
+<my-element name="Earth"></my-element>
+
+<h3>HTML</h3>
+
+```html
+<my-element name="Earth"></my-element>
+```

lit-element-starter-ts/docs-src/index.md

@@ -0,0 +1,76 @@
+---
+layout: page.11ty.cjs
+title: <my-element> ⌲ Home
+---
+
+# &lt;my-element>
+
+`<my-element>` is an awesome element. It's a great introduction to building web components with LitElement, with nice documentation site as well.
+
+## As easy as HTML
+
+<section class="columns">
+  <div>
+
+`<my-element>` is just an HTML element. You can it anywhere you can use HTML!
+
+```html
+<my-element></my-element>
+```
+
+  </div>
+  <div>
+
+<my-element></my-element>
+
+  </div>
+</section>
+
+## Configure with attributes
+
+<section class="columns">
+  <div>
+
+`<my-element>` can be configured with attributed in plain HTML.
+
+```html
+<my-element name="HTML"></my-element>
+```
+
+  </div>
+  <div>
+
+<my-element name="HTML"></my-element>
+
+  </div>
+</section>
+
+## Declarative rendering
+
+<section class="columns">
+  <div>
+
+`<my-element>` can be used with declarative rendering libraries like Angular, React, Vue, and lit-html
+
+```js
+import {html, render} from 'lit-html';
+
+const name = 'lit-html';
+
+render(
+  html`
+    <h2>This is a &lt;my-element&gt;</h2>
+    <my-element .name=${name}></my-element>
+  `,
+  document.body
+);
+```
+
+  </div>
+  <div>
+
+<h2>This is a &lt;my-element&gt;</h2>
+<my-element name="lit-html"></my-element>
+
+  </div>
+</section>

lit-element-starter-ts/docs-src/install.md

@@ -0,0 +1,32 @@
+---
+layout: page.11ty.cjs
+title: <my-element> ⌲ Install
+---
+
+# Install
+
+`<my-element>` is distributed on npm, so you can install it locally or use it via npm CDNs like unpkg.com.
+
+## Local Installation
+
+```bash
+npm i my-element
+```
+
+## CDN
+
+npm CDNs like [unpkg.com]() can directly serve files that have been published to npm. This works great for standard JavaScript modules that the browser can load natively.
+
+For this element to work from unpkg.com specifically, you need to include the `?module` query parameter, which tells unpkg.com to rewrite "bare" module specifiers to full URLs.
+
+### HTML
+
+```html
+<script type="module" src="https://unpkg.com/my-element?module"></script>
+```
+
+### JavaScript
+
+```html
+import {MyElement} from 'https://unpkg.com/my-element?module';
+```

lit-element-starter-ts/docs-src/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "commonjs"
+}

lit-element-starter-ts/docs/api/index.html

@@ -0,0 +1,139 @@
+
+<!doctype html>
+
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title><my-element> ⌲ Docs</title>
+    <link rel="stylesheet" href="../docs.css">
+    <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:300,400,600|Roboto+Mono">
+    <link href="../prism-okaidia.css" rel="stylesheet" />
+    <script src="/node_modules/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script>
+    <script src="/node_modules/lit/polyfill-support.js"></script>
+    <script type="module" src="../my-element.bundled.js"></script>
+  </head>
+  <body>
+    
+<header>
+  <h1>&lt;my-element></h1>
+  <h2>A web component just for me.</h2>
+</header>
+    
+<nav>
+  <a href="../">Home</a>
+  <a href="../examples/">Examples</a>
+  <a href="">API</a>
+  <a href="../install/">Install</a>
+</nav>
+    <div id="main-wrapper">
+      <main>
+        
+      <h1>API</h1>
+      
+        <h2>&lt;my-element></h2>
+        <div>
+          An example element.
+        </div>
+        
+    <h3>Attributes</h3>
+    <table>
+      <tr>
+        <th>Name</th><th>Description</th><th>Type</th><th>Default</th>
+      </tr>
+      
+        <tr>
+          <td>name</td><td>The name to say "Hello" to.</td><td>string</td><td>"World"</td>
+        </tr>
+      
+        <tr>
+          <td>count</td><td>The number of times the button has been clicked.</td><td>number</td><td>0</td>
+        </tr>
+      
+    </table>
+  
+        
+    <h3>Properties</h3>
+    <table>
+      <tr>
+        <th>Name</th><th>Attribute</th><th>Description</th><th>Type</th><th>Default</th>
+      </tr>
+      
+        <tr>
+          <td>name</td><td>name</td><td>The name to say "Hello" to.</td><td>string</td><td>"World"</td>
+        </tr>
+      
+        <tr>
+          <td>count</td><td>count</td><td>The number of times the button has been clicked.</td><td>number</td><td>0</td>
+        </tr>
+      
+        <tr>
+          <td>renderRoot</td><td>undefined</td><td>Node or ShadowRoot into which element DOM should be rendered. Defaults
+to an open shadowRoot.</td><td>HTMLElement | ShadowRoot</td><td>undefined</td>
+        </tr>
+      
+        <tr>
+          <td>isUpdatePending</td><td>undefined</td><td>undefined</td><td>boolean</td><td>undefined</td>
+        </tr>
+      
+        <tr>
+          <td>hasUpdated</td><td>undefined</td><td>undefined</td><td>boolean</td><td>undefined</td>
+        </tr>
+      
+        <tr>
+          <td>updateComplete</td><td>undefined</td><td>Returns a Promise that resolves when the element has completed updating.
+The Promise value is a boolean that is `true` if the element completed the
+update without triggering another update. The Promise result is `false` if
+a property was set inside `updated()`. If the Promise is rejected, an
+exception was thrown during the update.
+
+To await additional asynchronous work, override the `getUpdateComplete`
+method. For example, it is sometimes useful to await a rendered element
+before fulfilling this Promise. To do this, first await
+`super.getUpdateComplete()`, then any subsequent state.</td><td>Promise<boolean></td><td>undefined</td>
+        </tr>
+      
+    </table>
+    
+        
+            
+        
+    <h3>Slots</h3>
+    <table>
+      <tr>
+        <th>Name</th><th>Description</th>
+      </tr>
+      
+        <tr>
+          <td></td><td>This element has a slot</td>
+        </tr>
+      
+    </table>
+    
+        
+    <h3>CSS Shadow Parts</h3>
+    <table>
+      <tr>
+        <th>Name</th><th>Description</th>
+      </tr>
+      
+        <tr>
+          <td>button</td><td>The button</td>
+        </tr>
+      
+    </table>
+  
+        
+        
+    
+      </main>
+    </div>
+    
+<footer>
+  <p>
+    Made with
+    <a href="https://github.com/PolymerLabs/lit-starter-ts">lit-starter-ts</a>
+  </p>
+</footer>
+  </body>
+</html>

lit-element-starter-ts/docs/docs.css

@@ -0,0 +1,162 @@
+* {
+  box-sizing: border-box;
+}
+
+body {
+  margin: 0;
+  color: #333;
+  font-family: 'Open Sans', arial, sans-serif;
+  min-width: min-content;
+  min-height: 100vh;
+  font-size: 18px;
+  display: flex;
+  flex-direction: column;
+  align-items: stretch;
+}
+
+#main-wrapper {
+  flex-grow: 1;
+}
+
+main {
+  max-width: 1024px;
+  margin: 0 auto;
+}
+
+a:visited {
+  color: inherit;
+}
+
+header {
+  width: 100%;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  height: 360px;
+  margin: 0;
+  background: linear-gradient(0deg, rgba(9,9,121,1) 0%, rgba(0,212,255,1) 100%);
+  color: white;
+}
+
+footer {
+  width: 100%;
+  min-height: 120px;
+  background: gray;
+  color: white;
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+  padding: 12px;
+  margin-top: 64px;
+}
+
+h1 {
+  font-size: 2.5em;
+  font-weight: 400;
+}
+
+h2 {
+  font-size: 1.6em;
+  font-weight: 300;
+  margin: 64px 0 12px;
+}
+
+h3 {
+  font-weight: 300;
+}
+
+header h1 {
+  width: auto;
+  font-size: 2.8em;
+  margin: 0;
+}
+
+header h2 {
+  width: auto;
+  margin: 0;
+}
+
+nav {
+  display: grid;
+  width: 100%;
+  max-width: 100%;
+  grid-template-columns: repeat(auto-fit, 240px);
+  justify-content: center;
+  border-bottom: 1px solid #efefef;
+}
+
+nav > a {
+  color: #444;
+  display: block;
+  flex: 1;
+  font-size: 18px;
+  padding: 20px 0;
+  text-align: center;
+  text-decoration: none;
+}
+
+nav > a:hover {
+  text-decoration: underline;
+}
+
+nav.collection {
+  border: none;
+}
+
+nav.collection > ul {
+  padding: 0;
+  list-style: none;
+}
+
+nav.collection > ul > li {
+  padding: 4px 0;
+}
+
+nav.collection > ul > li.selected {
+  font-weight: 600;
+}
+
+nav.collection a {
+  text-decoration: none;
+}
+
+nav.collection a:hover {
+  text-decoration: underline;
+}
+
+section.columns {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(400px, 488px));
+  grid-gap: 48px;
+  justify-content: center;
+}
+
+section.columns > div {
+  flex: 1;
+}
+
+section.examples {
+  display: grid;
+  grid-template-columns: 240px minmax(400px, 784px);
+  grid-gap: 48px;
+  justify-content: center;
+}
+
+section.examples h2:first-of-type {
+  margin-top: 0;
+}
+
+table {
+  width: 100%;
+  border-collapse: collapse;
+}
+th {
+  font-weight: 600;
+}
+
+td, th {
+  border: solid 1px #aaa;
+  padding: 4px;
+  text-align: left;
+}

lit-element-starter-ts/docs/examples/index.html

@@ -0,0 +1,75 @@
+
+<!doctype html>
+
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title><my-element> ⌲ Examples ⌲ Basic</title>
+    <link rel="stylesheet" href="../docs.css">
+    <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:300,400,600|Roboto+Mono">
+    <link href="../prism-okaidia.css" rel="stylesheet" />
+    <script src="/node_modules/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script>
+    <script src="/node_modules/lit/polyfill-support.js"></script>
+    <script type="module" src="../my-element.bundled.js"></script>
+  </head>
+  <body>
+    
+<header>
+  <h1>&lt;my-element></h1>
+  <h2>A web component just for me.</h2>
+</header>
+    
+<nav>
+  <a href="../">Home</a>
+  <a href="">Examples</a>
+  <a href="../api/">API</a>
+  <a href="../install/">Install</a>
+</nav>
+    <div id="main-wrapper">
+      <main>
+        
+    <h1>Example: Basic</h1>
+    <section class="examples">
+      <nav class="collection">
+        <ul>
+          
+                  <li class=>
+                    <a href="name-property/">Setting the name property</a>
+                  </li>
+                
+                  <li class=selected>
+                    <a href="">A basic example</a>
+                  </li>
+                
+        </ul>
+      </nav>
+      <div>
+        <style>
+  my-element p {
+    border: solid 1px blue;
+    padding: 8px;
+  }
+</style>
+<my-element>
+  <p>This is child content</p>
+</my-element>
+<h3>CSS</h3>
+<pre class="language-css"><code class="language-css"><span class="token selector">p</span> <span class="token punctuation">{</span><br>  <span class="token property">border</span><span class="token punctuation">:</span> solid 1px blue<span class="token punctuation">;</span><br>  <span class="token property">padding</span><span class="token punctuation">:</span> 8px<span class="token punctuation">;</span><br><span class="token punctuation">}</span></code></pre>
+<h3>HTML</h3>
+<pre class="language-html"><code class="language-html"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>my-element</span><span class="token punctuation">></span></span><br>  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>p</span><span class="token punctuation">></span></span>This is child content<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>p</span><span class="token punctuation">></span></span><br><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>my-element</span><span class="token punctuation">></span></span></code></pre>
+
+      </div>
+    </section>
+  
+      </main>
+    </div>
+    
+<footer>
+  <p>
+    Made with
+    <a href="https://github.com/PolymerLabs/lit-starter-ts">lit-starter-ts</a>
+  </p>
+</footer>
+  </body>
+</html>

lit-element-starter-ts/docs/examples/name-property/index.html

@@ -0,0 +1,65 @@
+
+<!doctype html>
+
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title><my-element> ⌲ Examples ⌲ Name Property</title>
+    <link rel="stylesheet" href="../../docs.css">
+    <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:300,400,600|Roboto+Mono">
+    <link href="../../prism-okaidia.css" rel="stylesheet" />
+    <script src="/node_modules/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script>
+    <script src="/node_modules/lit/polyfill-support.js"></script>
+    <script type="module" src="../../my-element.bundled.js"></script>
+  </head>
+  <body>
+    
+<header>
+  <h1>&lt;my-element></h1>
+  <h2>A web component just for me.</h2>
+</header>
+    
+<nav>
+  <a href="../../">Home</a>
+  <a href="../">Examples</a>
+  <a href="../../api/">API</a>
+  <a href="../../install/">Install</a>
+</nav>
+    <div id="main-wrapper">
+      <main>
+        
+    <h1>Example: Name Property</h1>
+    <section class="examples">
+      <nav class="collection">
+        <ul>
+          
+                  <li class=selected>
+                    <a href="">Setting the name property</a>
+                  </li>
+                
+                  <li class=>
+                    <a href="../">A basic example</a>
+                  </li>
+                
+        </ul>
+      </nav>
+      <div>
+        <p><my-element name="Earth"></my-element></p>
+<h3>HTML</h3>
+<pre class="language-html"><code class="language-html"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>my-element</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>Earth<span class="token punctuation">"</span></span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>my-element</span><span class="token punctuation">></span></span></code></pre>
+
+      </div>
+    </section>
+  
+      </main>
+    </div>
+    
+<footer>
+  <p>
+    Made with
+    <a href="https://github.com/PolymerLabs/lit-starter-ts">lit-starter-ts</a>
+  </p>
+</footer>
+  </body>
+</html>

lit-element-starter-ts/docs/index.html

@@ -0,0 +1,75 @@
+
+<!doctype html>
+
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title><my-element> ⌲ Home</title>
+    <link rel="stylesheet" href="docs.css">
+    <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:300,400,600|Roboto+Mono">
+    <link href="prism-okaidia.css" rel="stylesheet" />
+    <script src="/node_modules/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script>
+    <script src="/node_modules/lit/polyfill-support.js"></script>
+    <script type="module" src="my-element.bundled.js"></script>
+  </head>
+  <body>
+    
+<header>
+  <h1>&lt;my-element></h1>
+  <h2>A web component just for me.</h2>
+</header>
+    
+<nav>
+  <a href="">Home</a>
+  <a href="examples/">Examples</a>
+  <a href="api/">API</a>
+  <a href="install/">Install</a>
+</nav>
+    <div id="main-wrapper">
+      <main>
+        <h1>&lt;my-element&gt;</h1>
+<p><code>&lt;my-element&gt;</code> is an awesome element. It's a great introduction to building web components with LitElement, with nice documentation site as well.</p>
+<h2>As easy as HTML</h2>
+<section class="columns">
+  <div>
+<p><code>&lt;my-element&gt;</code> is just an HTML element. You can it anywhere you can use HTML!</p>
+<pre class="language-html"><code class="language-html"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>my-element</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>my-element</span><span class="token punctuation">></span></span></code></pre>
+  </div>
+  <div>
+<p><my-element></my-element></p>
+  </div>
+</section>
+<h2>Configure with attributes</h2>
+<section class="columns">
+  <div>
+<p><code>&lt;my-element&gt;</code> can be configured with attributed in plain HTML.</p>
+<pre class="language-html"><code class="language-html"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>my-element</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>HTML<span class="token punctuation">"</span></span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>my-element</span><span class="token punctuation">></span></span></code></pre>
+  </div>
+  <div>
+<p><my-element name="HTML"></my-element></p>
+  </div>
+</section>
+<h2>Declarative rendering</h2>
+<section class="columns">
+  <div>
+<p><code>&lt;my-element&gt;</code> can be used with declarative rendering libraries like Angular, React, Vue, and lit-html</p>
+<pre class="language-js"><code class="language-js"><span class="token keyword">import</span> <span class="token punctuation">{</span>html<span class="token punctuation">,</span> render<span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'lit-html'</span><span class="token punctuation">;</span><br><br><span class="token keyword">const</span> name <span class="token operator">=</span> <span class="token string">'lit-html'</span><span class="token punctuation">;</span><br><br><span class="token function">render</span><span class="token punctuation">(</span><br>  html<span class="token template-string"><span class="token template-punctuation string">`</span><span class="token string"><br>    &lt;h2>This is a &amp;lt;my-element&amp;gt;&lt;/h2><br>    &lt;my-element .name=</span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span>name<span class="token interpolation-punctuation punctuation">}</span></span><span class="token string">>&lt;/my-element><br>  </span><span class="token template-punctuation string">`</span></span><span class="token punctuation">,</span><br>  document<span class="token punctuation">.</span>body<br><span class="token punctuation">)</span><span class="token punctuation">;</span></code></pre>
+  </div>
+  <div>
+<h2>This is a &lt;my-element&gt;</h2>
+<my-element name="lit-html"></my-element>
+  </div>
+</section>
+
+      </main>
+    </div>
+    
+<footer>
+  <p>
+    Made with
+    <a href="https://github.com/PolymerLabs/lit-starter-ts">lit-starter-ts</a>
+  </p>
+</footer>
+  </body>
+</html>

lit-element-starter-ts/docs/install/index.html

@@ -0,0 +1,53 @@
+
+<!doctype html>
+
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title><my-element> ⌲ Install</title>
+    <link rel="stylesheet" href="../docs.css">
+    <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:300,400,600|Roboto+Mono">
+    <link href="../prism-okaidia.css" rel="stylesheet" />
+    <script src="/node_modules/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script>
+    <script src="/node_modules/lit/polyfill-support.js"></script>
+    <script type="module" src="../my-element.bundled.js"></script>
+  </head>
+  <body>
+    
+<header>
+  <h1>&lt;my-element></h1>
+  <h2>A web component just for me.</h2>
+</header>
+    
+<nav>
+  <a href="../">Home</a>
+  <a href="../examples/">Examples</a>
+  <a href="../api/">API</a>
+  <a href="">Install</a>
+</nav>
+    <div id="main-wrapper">
+      <main>
+        <h1>Install</h1>
+<p><code>&lt;my-element&gt;</code> is distributed on npm, so you can install it locally or use it via npm CDNs like unpkg.com.</p>
+<h2>Local Installation</h2>
+<pre class="language-bash"><code class="language-bash"><span class="token function">npm</span> i my-element</code></pre>
+<h2>CDN</h2>
+<p>npm CDNs like <a href="">unpkg.com</a> can directly serve files that have been published to npm. This works great for standard JavaScript modules that the browser can load natively.</p>
+<p>For this element to work from unpkg.com specifically, you need to include the <code>?module</code> query parameter, which tells unpkg.com to rewrite &quot;bare&quot; module specificers to full URLs.</p>
+<h3>HTML</h3>
+<pre class="language-html"><code class="language-html"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>module<span class="token punctuation">"</span></span> <span class="token attr-name">src</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>https://unpkg.com/my-element?module<span class="token punctuation">"</span></span><span class="token punctuation">></span></span><span class="token script"></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">></span></span></code></pre>
+<h3>JavaScript</h3>
+<pre class="language-html"><code class="language-html">import {MyElement} from 'https://unpkg.com/my-element?module';</code></pre>
+
+      </main>
+    </div>
+    
+<footer>
+  <p>
+    Made with
+    <a href="https://github.com/PolymerLabs/lit-starter-ts">lit-starter-ts</a>
+  </p>
+</footer>
+  </body>
+</html>

lit-element-starter-ts/docs/prism-okaidia.css

@@ -0,0 +1,123 @@
+/**
+ * okaidia theme for JavaScript, CSS and HTML
+ * Loosely based on Monokai textmate theme by http://www.monokai.nl/
+ * @author ocodia
+ */
+
+code[class*="language-"],
+pre[class*="language-"] {
+	color: #f8f8f2;
+	background: none;
+	text-shadow: 0 1px rgba(0, 0, 0, 0.3);
+	font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
+	font-size: 1em;
+	text-align: left;
+	white-space: pre;
+	word-spacing: normal;
+	word-break: normal;
+	word-wrap: normal;
+	line-height: 1.5;
+
+	-moz-tab-size: 4;
+	-o-tab-size: 4;
+	tab-size: 4;
+
+	-webkit-hyphens: none;
+	-moz-hyphens: none;
+	-ms-hyphens: none;
+	hyphens: none;
+}
+
+/* Code blocks */
+pre[class*="language-"] {
+	padding: 1em;
+	margin: .5em 0;
+	overflow: auto;
+	border-radius: 0.3em;
+}
+
+:not(pre) > code[class*="language-"],
+pre[class*="language-"] {
+	background: #272822;
+}
+
+/* Inline code */
+:not(pre) > code[class*="language-"] {
+	padding: .1em;
+	border-radius: .3em;
+	white-space: normal;
+}
+
+.token.comment,
+.token.prolog,
+.token.doctype,
+.token.cdata {
+	color: #8292a2;
+}
+
+.token.punctuation {
+	color: #f8f8f2;
+}
+
+.token.namespace {
+	opacity: .7;
+}
+
+.token.property,
+.token.tag,
+.token.constant,
+.token.symbol,
+.token.deleted {
+	color: #f92672;
+}
+
+.token.boolean,
+.token.number {
+	color: #ae81ff;
+}
+
+.token.selector,
+.token.attr-name,
+.token.string,
+.token.char,
+.token.builtin,
+.token.inserted {
+	color: #a6e22e;
+}
+
+.token.operator,
+.token.entity,
+.token.url,
+.language-css .token.string,
+.style .token.string,
+.token.variable {
+	color: #f8f8f2;
+}
+
+.token.atrule,
+.token.attr-value,
+.token.function,
+.token.class-name {
+	color: #e6db74;
+}
+
+.token.keyword {
+	color: #66d9ef;
+}
+
+.token.regex,
+.token.important {
+	color: #fd971f;
+}
+
+.token.important,
+.token.bold {
+	font-weight: bold;
+}
+.token.italic {
+	font-style: italic;
+}
+
+.token.entity {
+	cursor: help;
+}

lit-element-starter-ts/package.json

@@ -0,0 +1,71 @@
+{
+  "name": "@lit/lit-starter-ts",
+  "private": true,
+  "version": "0.0.0",
+  "description": "A simple web component",
+  "main": "my-element.js",
+  "module": "my-element.js",
+  "type": "module",
+  "scripts": {
+    "build": "tsc",
+    "build:watch": "tsc --watch",
+    "clean": "rimraf my-element.{d.ts,d.ts.map,js,js.map} test/my-element.{d.ts,d.ts.map,js,js.map} test/my-element_test.{d.ts,d.ts.map,js,js.map}",
+    "lint": "npm run lint:lit-analyzer && npm run lint:eslint",
+    "lint:eslint": "eslint 'src/**/*.ts'",
+    "lint:lit-analyzer": "lit-analyzer",
+    "format": "prettier \"**/*.{cjs,html,js,json,md,ts}\" --ignore-path ./.eslintignore --write",
+    "docs": "npm run docs:clean && npm run build && npm run analyze && npm run docs:build && npm run docs:assets && npm run docs:gen",
+    "docs:clean": "rimraf docs",
+    "docs:gen": "eleventy --config=.eleventy.cjs",
+    "docs:gen:watch": "eleventy --config=.eleventy.cjs --watch",
+    "docs:build": "rollup -c --file docs/my-element.bundled.js",
+    "docs:assets": "cp node_modules/prismjs/themes/prism-okaidia.css docs/",
+    "docs:serve": "wds --root-dir=docs --node-resolve --watch",
+    "analyze": "wca analyze \"src/**/*.ts\" --outFile custom-elements.json",
+    "serve": "wds --watch",
+    "test": "wtr",
+    "test:watch": "npm run test -- --watch",
+    "checksize": "rollup -c ; cat my-element.bundled.js | gzip -9 | wc -c ; rm my-element.bundled.js"
+  },
+  "keywords": [
+    "web-components",
+    "lit-element",
+    "typescript",
+    "lit"
+  ],
+  "author": "Google LLC",
+  "license": "BSD-3-Clause",
+  "dependencies": {
+    "lit": "^2.0.0-rc.1"
+  },
+  "devDependencies": {
+    "@11ty/eleventy": "^0.12.1",
+    "@11ty/eleventy-plugin-syntaxhighlight": "^3.0.1",
+    "@esm-bundle/chai": "^4.1.5",
+    "@open-wc/testing": "^2.5.32",
+    "@open-wc/testing-karma": "^4.0.9",
+    "@rollup/plugin-node-resolve": "^9.0.0",
+    "@rollup/plugin-replace": "^2.3.3",
+    "@types/mocha": "^7.0.2",
+    "@typescript-eslint/eslint-plugin": "^2.27.0",
+    "@typescript-eslint/parser": "^2.27.0",
+    "@web/dev-server": "0.0.29",
+    "@web/dev-server-legacy": "^0.1.4",
+    "@web/dev-server-rollup": "^0.2.7",
+    "@web/test-runner": "^0.12.15",
+    "@web/test-runner-mocha": "^0.3.5",
+    "@web/test-runner-playwright": "^0.8.4",
+    "@webcomponents/webcomponentsjs": "^2.5.0",
+    "deepmerge": "^4.2.2",
+    "eslint": "^6.8.0",
+    "lit-analyzer": "^1.1.10",
+    "mocha": "^7.1.1",
+    "prettier": "^2.0.4",
+    "rimraf": "^3.0.2",
+    "rollup": "^2.28.2",
+    "rollup-plugin-summary": "^1.2.3",
+    "rollup-plugin-terser": "^7.0.2",
+    "typescript": "^3.8.3",
+    "web-component-analyzer": "^1.0.3"
+  }
+}

lit-element-starter-ts/rollup.config.js

@@ -0,0 +1,38 @@
+/**
+ * @license
+ * Copyright 2018 Google LLC
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+import summary from 'rollup-plugin-summary';
+import {terser} from 'rollup-plugin-terser';
+import resolve from '@rollup/plugin-node-resolve';
+import replace from '@rollup/plugin-replace';
+
+export default {
+  input: 'my-element.js',
+  output: {
+    file: 'my-element.bundled.js',
+    format: 'esm',
+  },
+  onwarn(warning) {
+    if (warning.code !== 'THIS_IS_UNDEFINED') {
+      console.error(`(!) ${warning.message}`);
+    }
+  },
+  plugins: [
+    replace({'Reflect.decorate': 'undefined'}),
+    resolve(),
+    terser({
+      ecma: 2017,
+      module: true,
+      warnings: true,
+      mangle: {
+        properties: {
+          regex: /^__/,
+        },
+      },
+    }),
+    summary(),
+  ],
+};

lit-element-starter-ts/src/my-element.ts

@@ -0,0 +1,62 @@
+/**
+ * @license
+ * Copyright 2019 Google LLC
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+import {LitElement, html, css} from 'lit';
+import {customElement, property} from 'lit/decorators.js';
+
+/**
+ * An example element.
+ *
+ * @slot - This element has a slot
+ * @csspart button - The button
+ */
+@customElement('my-element')
+export class MyElement extends LitElement {
+  static styles = css`
+    :host {
+      display: block;
+      border: solid 1px gray;
+      padding: 16px;
+      max-width: 800px;
+    }
+  `;
+
+  /**
+   * The name to say "Hello" to.
+   */
+  @property()
+  name = 'World';
+
+  /**
+   * The number of times the button has been clicked.
+   */
+  @property({type: Number})
+  count = 0;
+
+  render() {
+    return html`
+      <h1>Hello, ${this.name}!</h1>
+      <button @click=${this._onClick} part="button">
+        Click Count: ${this.count}
+      </button>
+      <slot></slot>
+    `;
+  }
+
+  private _onClick() {
+    this.count++;
+  }
+
+  foo(): string {
+    return 'foo';
+  }
+}
+
+declare global {
+  interface HTMLElementTagNameMap {
+    'my-element': MyElement;
+  }
+}

lit-element-starter-ts/src/test/my-element_test.ts

@@ -0,0 +1,63 @@
+/**
+ * @license
+ * Copyright 2021 Google LLC
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+import {MyElement} from '../my-element.js';
+
+import {fixture, html} from '@open-wc/testing';
+
+const assert = chai.assert;
+
+suite('my-element', () => {
+  test('is defined', () => {
+    const el = document.createElement('my-element');
+    assert.instanceOf(el, MyElement);
+  });
+
+  test('renders with default values', async () => {
+    const el = await fixture(html`<my-element></my-element>`);
+    assert.shadowDom.equal(
+      el,
+      `
+      <h1>Hello, World!</h1>
+      <button part="button">Click Count: 0</button>
+      <slot></slot>
+    `
+    );
+  });
+
+  test('renders with a set name', async () => {
+    const el = await fixture(html`<my-element name="Test"></my-element>`);
+    assert.shadowDom.equal(
+      el,
+      `
+      <h1>Hello, Test!</h1>
+      <button part="button">Click Count: 0</button>
+      <slot></slot>
+    `
+    );
+  });
+
+  test('handles a click', async () => {
+    const el = (await fixture(html`<my-element></my-element>`)) as MyElement;
+    const button = el.shadowRoot!.querySelector('button')!;
+    button.click();
+    await el.updateComplete;
+    assert.shadowDom.equal(
+      el,
+      `
+      <h1>Hello, World!</h1>
+      <button part="button">Click Count: 1</button>
+      <slot></slot>
+    `
+    );
+  });
+
+  test('styling applied', async () => {
+    const el = (await fixture(html`<my-element></my-element>`)) as MyElement;
+    await el.updateComplete;
+    assert.equal(getComputedStyle(el).paddingTop, '16px');
+  });
+});

lit-element-starter-ts/tsconfig.json

@@ -0,0 +1,32 @@
+{
+  "compilerOptions": {
+    "target": "es2019",
+    "module": "es2020",
+    "lib": ["es2020", "DOM", "DOM.Iterable"],
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true,
+    "inlineSources": true,
+    "outDir": "./",
+    "rootDir": "./src",
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true,
+    "noImplicitAny": true,
+    "noImplicitThis": true,
+    "moduleResolution": "node",
+    "allowSyntheticDefaultImports": true,
+    "experimentalDecorators": true,
+    "forceConsistentCasingInFileNames": true,
+    "plugins": [
+      {
+        "name": "ts-lit-plugin",
+        "strict": true
+      }
+    ]
+  },
+  "include": ["src/**/*.ts"],
+  "exclude": []
+}

lit-element-starter-ts/web-dev-server.config.js

@@ -0,0 +1,20 @@
+/**
+ * @license
+ * Copyright 2021 Google LLC
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+import {legacyPlugin} from '@web/dev-server-legacy';
+
+export default {
+  nodeResolve: true,
+  preserveSymlinks: true,
+  plugins: [
+    legacyPlugin({
+      polyfills: {
+        // Manually imported in index.html file
+        webcomponents: false,
+      },
+    }),
+  ],
+};

lit-element-starter-ts/web-test-runner.config.js

@@ -0,0 +1,119 @@
+/**
+ * @license
+ * Copyright 2021 Google LLC
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+import {legacyPlugin} from '@web/dev-server-legacy';
+import {playwrightLauncher} from '@web/test-runner-playwright';
+
+// Uncomment for testing on Sauce Labs
+// Must run `npm i --save-dev @web/test-runner-saucelabs` and set
+// SAUCE_USERNAME and SAUCE_USERNAME environment variables
+// ===========
+// import {createSauceLabsLauncher} from '@web/test-runner-saucelabs';
+// const sauceLabsLauncher = createSauceLabsLauncher(
+//   {
+//     user: process.env.SAUCE_USERNAME,
+//     key: process.env.SAUCE_USERNAME,
+//   },
+//   {
+//     'sauce:options': {
+//       name: 'unit tests',
+//       build: `${process.env.GITHUB_REF ?? 'local'} build ${
+//         process.env.GITHUB_RUN_NUMBER ?? ''
+//       }`,
+//     },
+//   }
+// );
+
+// Uncomment for testing on BrowserStack
+// Must run `npm i --save-dev @web/test-runner-browserstack` and set
+// BROWSER_STACK_USERNAME and BROWSER_STACK_ACCESS_KEY environment variables
+// ===========
+// import {browserstackLauncher as createBrowserstackLauncher} from '@web/test-runner-browserstack';
+// const browserstackLauncher = (config) => createBrowserstackLauncher({
+//   capabilities: {
+//     'browserstack.user': process.env.BROWSER_STACK_USERNAME,
+//     'browserstack.key': process.env.BROWSER_STACK_ACCESS_KEY,
+//     project: 'my-element',
+//     name: 'unit tests',
+//     build: `${process.env.GITHUB_REF ?? 'local'} build ${
+//       process.env.GITHUB_RUN_NUMBER ?? ''
+//     }`,
+//     ...config,
+//   }
+// });
+
+const browsers = {
+  // Local browser testing via playwright
+  // ===========
+  chromium: playwrightLauncher({product: 'chromium'}),
+  firefox: playwrightLauncher({product: 'firefox'}),
+  webkit: playwrightLauncher({product: 'webkit'}),
+
+  // Uncomment example launchers for running on Sauce Labs
+  // ===========
+  // chromium: sauceLabsLauncher({browserName: 'chrome', browserVersion: 'latest', platformName: 'Windows 10'}),
+  // firefox: sauceLabsLauncher({browserName: 'firefox', browserVersion: 'latest', platformName: 'Windows 10'}),
+  // edge: sauceLabsLauncher({browserName: 'MicrosoftEdge', browserVersion: 'latest', platformName: 'Windows 10'}),
+  // ie11: sauceLabsLauncher({browserName: 'internet explorer', browserVersion: '11.0', platformName: 'Windows 10'}),
+  // safari: sauceLabsLauncher({browserName: 'safari', browserVersion: 'latest', platformName: 'macOS 10.15'}),
+
+  // Uncomment example launchers for running on Sauce Labs
+  // ===========
+  // chromium: browserstackLauncher({browserName: 'Chrome', os: 'Windows', os_version: '10'}),
+  // firefox: browserstackLauncher({browserName: 'Firefox', os: 'Windows', os_version: '10'}),
+  // edge: browserstackLauncher({browserName: 'MicrosoftEdge', os: 'Windows', os_version: '10'}),
+  // ie11: browserstackLauncher({browserName: 'IE', browser_version: '11.0', os: 'Windows', os_version: '10'}),
+  // safari: browserstackLauncher({browserName: 'Safari', browser_version: '14.0', os: 'OS X', os_version: 'Big Sur'}),
+};
+
+// Prepend BROWSERS=x,y to `npm run test` to run a subset of browsers
+// e.g. `BROWSERS=chromium,firefox npm run test`
+const noBrowser = (b) => {
+  throw new Error(`No browser configured named '${b}'; using defaults`);
+};
+let commandLineBrowsers;
+try {
+  commandLineBrowsers = process.env.BROWSERS?.split(',').map(
+    (b) => browsers[b] ?? noBrowser(b)
+  );
+} catch (e) {
+  console.warn(e);
+}
+
+// https://modern-web.dev/docs/test-runner/cli-and-configuration/
+export default {
+  rootDir: '.',
+  files: ['./test/**/*_test.js'],
+  nodeResolve: true,
+  preserveSymlinks: true,
+  browsers: commandLineBrowsers ?? Object.values(browsers),
+  testFramework: {
+    // https://mochajs.org/api/mocha
+    config: {
+      ui: 'tdd',
+    },
+  },
+  plugins: [
+    // Detect browsers without modules (e.g. IE11) and transform to SystemJS
+    // (https://modern-web.dev/docs/dev-server/plugins/legacy/).
+    legacyPlugin({
+      polyfills: {
+        webcomponents: true,
+        // Inject lit's polyfill-support module into test files, which is required
+        // for interfacing with the webcomponents polyfills
+        custom: [
+          {
+            name: 'lit-polyfill-support',
+            path: 'node_modules/lit/polyfill-support.js',
+            test:
+              "!('attachShadow' in Element.prototype) || !('getRootNode' in Element.prototype) || window.ShadyDOM && window.ShadyDOM.force",
+            module: false,
+          },
+        ],
+      },
+    }),
+  ],
+};