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From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups: comp.lang.javascript
Subject: Re: Overriding function and adding a bit
Date: Wed, 10 May 2017 19:13:12 +0200
Organization: PointedEars Software (PES)
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Xref: csiph.com comp.lang.javascript:33261

Andrew Poulos wrote:

> function ObjLayerMoveTo(x, y) {
>    /* 100+ lines of spaghetti code */
> }
> 
> […]
> var myObjLayerMoveTo = window.ObjLayerMoveTo;
> 
> window.ObjLayerMoveTo = function(x, y) {
>    if (this.id == "foo") return;
>    myObjLayerMoveTo(x, y);
> };
> 
> 
> Is this the way to approach this?

No, it should be

  var myObjLayerMoveTo = ObjLayerMoveTo;

  ObjLayerMoveTo = function (x, y) {
     if (this.id == "foo") return;
     myObjLayerMoveTo(x, y);
  };

Do not confuse the “window” object with the ECMAScript global object.

-- 
PointedEars

Twitter: @PointedEars2
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