Several commonly used functions and configurations in seajs

This article mainly introduces the 7 most commonly used functions and configurations in seajs, and briefly analyzes the commonly used project configuration, module loading, definition, acquisition and other operating techniques in seajs in the form of examples. Friends in need can refer to the following. I hope Can help everyone.

1. seajs.config

seajs.config({
 // 设置路径，方便跨项目调用
 paths: {
  'path1': '....',
  'path2': '....'
 },
 // 设置别名，方便调用
 alias: {
  'class1': '...',
  'class2': '...'
 }
});

2. seajs.use

Used to load one or more modules in the page

// 加载一个模块
seajs.use('./a');
// 加载一个模块，在加载完成时，执行回调
seajs.use('./a', function(a) {
 a.doSomething();
});
// 加载多个模块，在加载完成时，执行回调
seajs.use(['./a', './b'], function(a, b) {
 a.doSomething();
 b.doSomething();
});

3. define

is used to define modules.

define(function(require, exports, module) {
 // 模块代码
});

4. require

The interface used to obtain the specified module

define(function(require) {
 // 获取模块a的接口
 var a = require('./a');
 // 调用模块a的方法
 a.doSomething();
});

5. require.async

is used to load one or more modules asynchronously inside the module

define(function(require) {
 // 异步加载一个模块，在加载完成时执行回调
 require.async('./b', function(b) {
  b.doSomething();
 });
 // 异步加载多个模块，在加载完成时执行回调
 require.async(['./c', './d'], function(c, d) {
  c.doSomething();
  d.doSomething();
 });
});

6. exports

is used to load one or more modules asynchronously inside the module Providing interfaces internally to the outside world

define(function(require, exports) {
 // 对外提供foo属性
 exports.foo = 'bar';
 // 对外提供doSomething方法
 exports.doSomething = function() {};
});

7. module.exports

is used to provide interfaces internally to the outside world

define(function(require, exports, module) {
 // 对外提供接口
 module.exports = {
  name: 'a',
  doSomething: function() {};
 };
});

Related recommendations:

JavaScript modular development library SeaJS

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