angular源码剖析之模块加载器

angular1.5.8源码分析

setupModuleLoader方法

模仿setupModuleLoader方法看看如何angular是如何构造angular.module的

function setupModuleLoader(window) {

//函数内部声明函数
function ensure(obj, name, factory) {
  return obj[name] || (obj[name] = factory());
}

//定义全局angular变量
var angular = ensure(window, 'angular', Object);

//返回angular.module变量
return ensure(angular, 'module', function() {

    var modules = {};

    return function module(name, requires, configFn) {

          return ensure(modules, name, function() {

               var moduleInstance = {
                  hello : 'hello angular'
               };

               return moduleInstance;
          });
    };

})
}

var window = {};

angularModule = setupModuleLoader(window);

angularModule('ng', ['ngLocale'], ['$provide', function ngModule($provide) {}]);

//已经存在ng这个module
console.log(window.angular.module('ng').hello)

控制台输出hello angular