43 lines
948 B
Markdown
43 lines
948 B
Markdown
# AJAX
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```javascript
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let request = new XMLHttpRequest();
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request.open("GET", "http://www.example.com/");
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request.onreadystatechange = function () {
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if (this.readyState === 4 && request.status === 200) {
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let result = JSON.parse(request.responseText);
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}
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};
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request.send();
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```
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- open()
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- setRequestHeader()
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- responseType
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- attaybuffer
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- blob
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- document
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- json
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- text
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- timeout
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- onreadystatechange
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- UNSENT : 0
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- OPENED : 1
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- HEADERS_RECEIVED : 2
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- LOADING : 3
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- DONE : 4
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- status, statusText
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- send()
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- response, responseText, responseURL, responseXML
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```javascript
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let request = new XMLHttpRequest();
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request.open("POST", "http://www.example.com/");
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request.responseType = "json";
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request.onreadystatechange = function () {
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if (this.readyState === DONE && request.status === 200) {
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let result = request.response;
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}
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};
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request.send(JSON.stringify({message : "Hello"}));
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``` |