project setup done.

src/_bootstrap.scss

@@ -0,0 +1,83 @@
+//---------------------------------------------
+//
+//  Partially loading Bootstrap's components
+//
+//    1. Functions
+//    2. Variables
+//    3. Mixins
+//    4. Root + Reboot
+//    5. Type
+//    6. Components
+//    7. Helpers & Mixins for Breakpoints + Print
+//
+//---------------------------------------------
+
+//---------------------------------------------
+// 1. Functions
+//---------------------------------------------
+
+@import "~bootstrap/scss/functions";
+
+//---------------------------------------------
+// 2. Variables
+//---------------------------------------------
+
+@import "~bootstrap/scss/variables";
+
+//---------------------------------------------
+// 3. Mixins
+//---------------------------------------------
+
+@import "~bootstrap/scss/mixins";
+@import "~bootstrap/scss/utilities";
+
+//---------------------------------------------
+// 4. Root + Reboot
+//---------------------------------------------
+
+@import "~bootstrap/scss/root";
+@import "~bootstrap/scss/reboot";
+
+//---------------------------------------------
+// 5. Type
+//---------------------------------------------
+
+@import "~bootstrap/scss/type";
+
+//---------------------------------------------
+// 6. Components
+//---------------------------------------------
+
+@import "~bootstrap/scss/images";
+@import "~bootstrap/scss/containers";
+@import "~bootstrap/scss/grid";
+@import "~bootstrap/scss/tables";
+@import "~bootstrap/scss/forms";
+@import "~bootstrap/scss/buttons";
+@import "~bootstrap/scss/transitions";
+@import "~bootstrap/scss/dropdown";
+@import "~bootstrap/scss/button-group";
+@import "~bootstrap/scss/nav";
+@import "~bootstrap/scss/navbar";
+@import "~bootstrap/scss/card";
+@import "~bootstrap/scss/accordion";
+@import "~bootstrap/scss/breadcrumb";
+@import "~bootstrap/scss/pagination";
+@import "~bootstrap/scss/badge";
+@import "~bootstrap/scss/alert";
+@import "~bootstrap/scss/progress";
+@import "~bootstrap/scss/list-group";
+@import "~bootstrap/scss/close";
+@import "~bootstrap/scss/toasts";
+@import "~bootstrap/scss/modal";
+@import "~bootstrap/scss/tooltip";
+@import "~bootstrap/scss/popover";
+@import "~bootstrap/scss/carousel";
+@import "~bootstrap/scss/spinners";
+
+//---------------------------------------------
+// 7. Helpers & Mixins for Breakpoints + Print
+//---------------------------------------------
+
+@import "~bootstrap/scss/helpers";
+@import "~bootstrap/scss/utilities/api";

src/_variables.scss

@@ -0,0 +1,53 @@
+//---------------------------------------------
+//
+//  Variables
+//
+//    1. Bootstrap Fonts
+//    2. Bootstrap Globals
+//    3. Bootstrap Colors
+//    4. Bootstrap Container Width
+//
+//---------------------------------------------
+
+//---------------------------------------------
+// 1. Bootstrap Fonts
+//---------------------------------------------
+
+$font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
+	"Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji",
+	"Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
+
+//---------------------------------------------
+// 2. Bootstrap Globals
+//---------------------------------------------
+
+$enable-rounded: true;
+$enable-shadows: false;
+$enable-gradients: false;
+
+//---------------------------------------------
+// 3. Bootstrap Colors
+//---------------------------------------------
+
+$body-color: #212121; // The default text color
+
+$primary: #303f9f;
+$secondary: #6c757d;
+$success: #198754;
+$info: #0dcaf0;
+$warning: #ffc107;
+$danger: #dc3545;
+$light: #f8f9fa;
+$dark: #212529;
+
+//---------------------------------------------
+// 4. Bootstrap Container Width
+//---------------------------------------------
+
+$container-max-widths: (
+	sm: 540px,
+	md: 720px,
+	lg: 960px,
+	xl: 1140px,
+	xxl: 1320px,
+);

src/index.js

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+import { bootstrap } from "bootstrap";
+import { popper } from "@popperjs/core";
+import "./index.scss";
+
+console.log("Hello World!");

src/index.scss

@@ -0,0 +1,3 @@
+@import "variables";
+@import "bootstrap";
+//@import "fonts";