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Detailed explanation of the difference between webpack require.ensure and require AMD_javascript skills
Detailed explanation of the difference between webpack require.ensure and require AMD_javascript skills
This article mainly introduces the detailed explanationwebpack The difference between require.ensure and require AMD. The editor thinks it is quite good and will also be used as a reference for everyone. If you are interested in webpack, you can follow the editor to take a look.
Introduction
The difference between require-ensure and require-amd:
require-amd
Description: Same as the require function of AMD specification. When used, a module array and callback function are passed. The callback function is executed only after the modules have been downloaded and executed.
Syntax: require(dependencies: String[], [callback: function(...)])
Parameters
dependencies: module dependency array
- ##callback: callback function
require-ensure
- dependencies: Array of dependent modules
- callback: callback function, a require parameter will be passed when the function is called
- chunkName: module name, used for building When generating files, use
Example
require-amd
Source codewebpack.config.amd .jsvar path = require("path");
module.exports = {
entry: "./example.amd.js",
output: {
path: path.join(__dirname, "amd"),
filename: "[name].bundle.js",
chunkFilename: "[id].chunk.js"
}
};require(["./module1"], function(module1) {
console.log("aaa");
var module2 = require("./module2");
console.log("bbb");
});console.log("module1");
module.exports = 1;
console.log("module2");
module.exports = 2;Build result
Run webpack in the command line --config webpack.config.amd.js- main.bundle. js
- example.amd.js
- 1.chunk.js
- module1.js
- module2.js
Run result
Run amd/index.html in the browser, the console output:module1 aaa module2 bbb
require-ensure
Source codewebpack.config.ensure.jsvar path = require("path");
module.exports = {
entry: "./example.ensure.js",
output: {
path: path.join(__dirname, "ensure"),
filename: "[name].bundle.js",
chunkFilename: "[name].chunk.js"
}
};require.ensure(["./module1"], function(require) {
console.log("aaa");
var module2 = require("./module2");
console.log("bbb");
require("./module1");
}, 'test');
##module1.js
module2.js
Run webpack in the command line --config webpack.config.ensure.js
- main.bundle.js- example. amd.js
- 1.chunk.js
- module1.js
- module2.js
Run in browser ensure/index.html, console output:
aaa
module2bbb
module1
##require-ensure-chunk
Source code
webpack.config.ensure.chunk.js##
var path = require("path");
module.exports = {
entry: "./example.ensur.chunk.js",
output: {
path: path.join(__dirname, "ensure-chunk"),
filename: "[name].bundle.js",
chunkFilename: "[name].chunk.js"
}
};require.ensure(["./module1"], function(require) {
console.log("aaa");
require("./module1");
console.log("bbb");
}, 'common');
require.ensure(["./module2"], function(require) {
console.log("ccc");
require("./module2");
console.log("ddd");
}, 'common');Same as above
Same as above
Build results
Run webpack in the command line --config webpack.config.ensure.js - main.bundle.js - example.amd.js
- 1.chunk.js- module1.js
- module2.js
Running result
Browser Run ensure/index.html in, the console output: aaa
module1bbb
ccc1module2
ddd
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