Angular 4将全局常量提供给zone.js [英] Angular 4 put a global constant available to zone.js

问题描述

我正在将Angular(我认为是4)与Typescript和zone.js(0.8.4)配合使用.我通过"polyfills.ts"文件导入zone.js.当我查看zone.js的源代码时，有这样的代码:

i am using Angular (4 i think) with typescript and zone.js (0.8.4). I import zone.js via the "polyfills.ts" file. When I look inside the source code of zone.js, there is code like this:

var isDisableIECheck = _global['__Zone_disable_IE_check'] || false;

我的问题是，如何在_globals中设置此变量?

My question is, how can I set this variable in _globals ?

谢谢

推荐答案

global是浏览器中的window对象，如下所示:

global is window object in a browser as can be seen here:

(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? factory() :
    typeof define === 'function' && define.amd ? define(factory) :
    (factory());
}(this,    <------------ `this` points to `window` in global scope
 (function () { 
   ...
});

因此您可以像这样设置变量:

so you can set the variable like this:

window['__Zone_disable_IE_check'] = true;

但是您需要在 加载zone.js之前执行此操作.如果在index.html中加载zone.js，请添加以下内容:

But you need to do that before zone.js is loaded. If you load zone.js in index.html, add the following:

<script>
    window['__Zone_disable_IE_check'] = true;
</script>
<script src="node_modules/zone.js/dist/zone.js"></script>

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