第2行至第7是什么意思
(function(global, factory) {
factory(global);
}(typeof window !== "undefined" ? window : this, function(window, noGlobal) {
var jQuery = function( selector, context ) {
return new jQuery.fn.init( selector, context );
qq_陈祥芬_0
2017-10-10
2 回答
(function(global, factory) {
factory(global);
}(typeof window !== "undefined" ? window : this, function(window, noGlobal) {
var jQuery = function( selector, context ) {
return new jQuery.fn.init( selector, context );等价于(function(global) { var factory=function(global, undenfined) { var jQuery = function( selector, context ) { return new jQuery.fn.init( selector, context ); } }})(typeof window !== "undefined" ? window : this);
// 其实这一部分是用来判断jQ运行环境的，第一运行环境是node.js类似CommonJS和CommonJ，第二个环境是window，就是客户端，（浏览器）
里面说过：(function(global, factory) {
factory(global);
}(typeof window !== "undefined" ? window : this, function(window, noGlobal) {
var jQuery = function( selector, context ) {
return new jQuery.fn.init( selector, context );等价于
(function(global) {
var factory=function(global, undenfined) {
var jQuery = function( selector, context ) {
return new jQuery.fn.init( selector, context );
}
}
})(typeof window !== "undefined" ? window : this);
factory参数传入的是个function，就是后面括号里的function(window, noGlobal) window=global，noglobal可看作undenfined未定义
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