Angular 4 put a global constant available to zone.js

Question

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

Answer 1

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 () { 
   ...
});

so you can set the variable like this:

window['__Zone_disable_IE_check'] = true;

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