Not really SuiteScript, but JS question: overriding another objects methods

Apr 23, 2008 1:44AM

It isn't really overriding because the two objects are in the same hierarchy, it's more "hijacking".

What I want to do is have one object ("Mgr") hijack a method on an instance of another object ("Widget")

My real code is way complex and messy, but I banged out a very simple example that illustrates what I want. I'm sure this will show my js-rookie-ness but I'm stuck!

Basically, if you save the below code in a text file (with html extension) you should be good to go.

 &amp;lt;html&amp;gt;  &amp;lt;head&amp;gt;  &amp;lt;title&amp;gt;javascript tester&amp;lt;/title&amp;gt;  &amp;lt;script&amp;gt;  var m = new Mgr();  var w = new Widget();    function Widget()  {      this.setLabel = function()      {          alert('this is the Widget method');      }  }    function Mgr()  {      this._oldWidgetMethod = null;            this.OverrideWidgetMethod = function()      {          this._oldWidgetMethod = w.setLabel;                var self = this;          w.setLabel = function()          {              self.setLabelOverride;          };      }        this.setLabelOverride = function()      {          this._oldWidgetMethod.apply(this, arguments);          alert('this is the Mgr method');      }  }    &amp;lt;/script&amp;gt;  &amp;lt;/head&amp;gt;  &amp;lt;body&amp;gt;  &amp;lt;input type=button value='Hijack Widget Method' onclick="m.OverrideWidgetMethod();"&amp;gt;  &amp;lt;input type=button value='Invoke Widget Method' onclick="w.setLabel();"&amp;gt;  &amp;lt;/body&amp;gt;  &amp;lt;/html&amp;gt;

Not really SuiteScript, but JS question: overriding another objects methods

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