AngularJS:window.angular变量 [英] AngularJS : window.angular variable

问题描述

我正在寻找有关window.angular变量的信息，但没有发现期望

I was looking for informations to window.angular variable and i found nothing expect this post. In this post we have the following code :

(function(angular, undefined){
    'use script';
    var djng_forms_module = angular.module('ng.django.forms', []);
    funtion hasCode(s){
        return .....
    }
    var foo = .....
}(window.angular));

有人解释说，当我们使用此代码段时，它确保在填充变量 window.angular 之后执行该代码段.我不明白为什么使用此语法时不可能无法定义 window.angular ，您能向我解释为什么吗?

And a person explains that when we use this code fragment it ensures that it is executed after the population of the variable window.angular. I don't understand why it could not be possible that window.angular could be undefined when use this syntax, could you explain to me why please ?

先谢谢您了:)

推荐答案

与确保此处的角度无关.据我所知，该语法可以执行3件事:

It has nothing to do with ensuring angular is here. It's the syntax that, as I know, does 3 things:

1. 允许Minifier更改局部作用域变量的名称
2. 减少变量的访问时间，因为它是本地作用域的
3. 如果有人会创建局部范围内的角度"变量，则可以确保通过显式使用window变量来使用全局变量

但是，由于IIFE被立即调用，根据其定义，它不能以任何方式确保window.angular的显示.

But since the IIFE is invoked immediately, according to it's definition, it doesn't ensure in any way that window.angular is presented.

这篇关于AngularJS:window.angular变量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！