javascript - How to import jquery using ES6 syntax?

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javascript - How to import jquery using ES6 syntax?

posted Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

javascript - How to import jquery using ES6 syntax?

I'm writing a new app using (JavaScript) ES6 syntax through babel transpiler and the preset-es2015 plugins, as well as semantic-ui for the style.

index.js

import * as stylesheet from '../assets/styles/app.scss';
import * as jquery2 from '../dist/scripts/jquery.min';
import * as jquery3 from '../node_modules/jquery/dist/jquery.min';

console.log($('my-app'));

index.html

<!DOCTYPE html>
<html lang="fr">
<head>
<body>
<script src="dist/app.js"></script>
</body>
</html>

Project structure

.
├── app/
│   ├── index.js
├── assets/
├── dist/
│   ├── scripts/
│   │   ├── jquery.min.js
├── index.html
├── node_modules/
│   ├── jquery/
│   │   ├── dist/
│   │   │   ├── jquery.min.js
├── package.json
└── tests/

package.json

  …
  "scripts": {
    "build:app": "browserify -e ./app/index.js -o ./dist/app.js",
    "copy:jquery": "cpy 'node_modules/jquery/dist/jquery.min.js' ./dist/scripts/",
    …
  },
  "devDependencies": {
    "babel-core": "6.3.x",
    "babel-preset-es2015": "6.3.x",
    "babelify": "7.2.x",
    "cpy": "3.4.x",
    "npm-run-all": "1.4.x",
    "sassify": "0.9.x",
    "semantic-ui": "2.1.x",
    …
  },
  "browserify": {
    "transform": [
      [ "babelify", { "presets": [ "es2015"]}],
      [ "sassify", { "auto-inject": true}]
    ]
  }

Question

Using classic <script> tag to import jquery works fine, but I'm trying to use the ES6 syntax.

How do I import jquery to satisfy semantic-ui using ES6 import syntax?
Should I import from the node_modules/ directory or my dist/ (where I copy everything)?

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1 Reply

深蓝 · Answer 1 · 2021-10-16T22:11:48+0000

index.js

import {$,jQuery} from 'jquery';
// export for others scripts to use
window.$ = $;
window.jQuery = jQuery;

First, as @nem suggested in comment, the import should be done from node_modules/:

Well, importing from dist/ doesn't make sense since that is your distribution folder with production ready app. Building your app should take what's inside node_modules/ and add it to the dist/ folder, jQuery included.

Next, the glob –* as– is wrong as I know what object I'm importing (e.g. jQuery and $), so a straigforward import statement will work.

Last you need to expose it to other scripts using the window.$ = $.

Then, I import as both $ and jQuery to cover all usages, browserify remove import duplication, so no overhead here! ^o^y

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javascript - How to import jquery using ES6 syntax?

javascript - How to import jquery using ES6 syntax?

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index.html

Project structure

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