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68 lines
2.0 KiB
Markdown
68 lines
2.0 KiB
Markdown
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# jQuery
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> jQuery is a fast, small, and feature-rich JavaScript library.
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For information on how to get started and how to use jQuery, please see [jQuery's documentation](http://api.jquery.com/).
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For source files and issues, please visit the [jQuery repo](https://github.com/jquery/jquery).
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If upgrading, please see the [blog post for 3.4.1](https://blog.jquery.com/2019/05/01/jquery-3-4-1-triggering-focus-events-in-ie-and-finding-root-elements-in-ios-10/). This includes notable differences from the previous version and a more readable changelog.
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## Including jQuery
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Below are some of the most common ways to include jQuery.
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### Browser
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#### Script tag
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```html
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<script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
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```
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#### Babel
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[Babel](http://babeljs.io/) is a next generation JavaScript compiler. One of the features is the ability to use ES6/ES2015 modules now, even though browsers do not yet support this feature natively.
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```js
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import $ from "jquery";
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```
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#### Browserify/Webpack
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There are several ways to use [Browserify](http://browserify.org/) and [Webpack](https://webpack.github.io/). For more information on using these tools, please refer to the corresponding project's documention. In the script, including jQuery will usually look like this...
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```js
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var $ = require("jquery");
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```
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#### AMD (Asynchronous Module Definition)
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AMD is a module format built for the browser. For more information, we recommend [require.js' documentation](http://requirejs.org/docs/whyamd.html).
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```js
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define(["jquery"], function($) {
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});
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```
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### Node
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To include jQuery in [Node](nodejs.org), first install with npm.
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```sh
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npm install jquery
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```
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For jQuery to work in Node, a window with a document is required. Since no such window exists natively in Node, one can be mocked by tools such as [jsdom](https://github.com/tmpvar/jsdom). This can be useful for testing purposes.
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```js
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require("jsdom").env("", function(err, window) {
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if (err) {
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console.error(err);
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return;
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}
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var $ = require("jquery")(window);
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});
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```
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