js 模块化基本原理

模块定义工具

---

file–[./mo.js]

module.exports = (function() {
    const modules = {};
    
    function define(name, deps, impl) {
        for(let index = 0, l = (deps || []).length; index < l; index++) {
            deps[index] = modules[deps[index]];
        }
        modules[name] = impl.apply(impl, deps);
    }
    
    function get(name) {
        return modules[name];
    }
    
    return {
        define,
        get,
    };
})();

使用方法

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file–[./demo.js]

const mo = require('./mo.js');

mo.define('m1', null, function() {
    function hello(name) {
        return `hello ${name}`;
    }
    
    return {
        hello
    };
});

mo.define('m2', ['m1'], function(tool) {
    function iam(name) {
        return `${tool.hello('Tom')}, I am ${name}.`;
    }
    
    return {
        iam
    };
});