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Groups > comp.lang.javascript > #24139

Re: intercept an alert

From Simon Lewis <simonlewis2001@gmail.com>
Newsgroups comp.lang.javascript
Subject Re: intercept an alert
Date 2014-05-12 12:29 +0200
Organization Lewis
Message-ID <8761lb47e7.fsf@gmail.com> (permalink)
References <862dneogqrcsze3OnZ2dnUVZ_gCdnZ2d@westnet.com.au> <raKdnSsnnK2Ow-3OnZ2dnUVZ_sadnZ2d@westnet.com.au> <3910370.hJEAF5dPUy@PointedEars.de>

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Thomas 'PointedEars' Lahn <PointedEars@web.de> writes:

> Andrew Poulos wrote:
>
>> if (!window._alert) {
>>    window._alert = window.alert;
>> }
>> 
>> window.alert = function(msg){
>>    if (msg.indexOf('is empty') != -1) {
>>      return false;
>>    } else {
>>      return window._alert.apply(this, arguments);
>>    }
>> };
>> 
>> Is this the way to go?
>
> Not quite.  You should not augment the host object referred to by “window” 
> with an “_alert” property (modifying its “alert” property is bad enough, but 
> I cannot see a better alternative here).  Use a variable or a property of 
> your own object instead.

Nonsense.

It's perfectly fine to do that.

People tag things on to "window" in each and every JS project.

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Thread

intercept an alert Andrew Poulos <ap_prog@hotmail.com> - 2014-05-12 14:38 +1000
  Re: intercept an alert Andrew Poulos <ap_prog@hotmail.com> - 2014-05-12 15:35 +1000
    Re: intercept an alert Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-05-12 11:32 +0200
      Re: intercept an alert Simon Lewis <simonlewis2001@gmail.com> - 2014-05-12 12:29 +0200
        Re: intercept an alert Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-05-12 13:30 +0200
        Re: intercept an alert "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2014-05-12 14:54 +0200
          Re: intercept an alert "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2014-05-12 15:36 +0200
            Re: intercept an alert Simon Lewis <simonlewis2001@gmail.com> - 2014-05-12 15:40 +0200
              Re: intercept an alert Simon Lewis <simonlewis2001@gmail.com> - 2014-05-12 15:43 +0200
                Re: intercept an alert "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2014-05-12 16:19 +0200
          Re: intercept an alert Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-05-12 19:35 +0200
    Re: intercept an alert garrett.smith@acxiom.com - 2014-05-14 09:57 -0700
  Re: intercept an alert Dr J R Stockton <reply1400@merlyn.demon.co.uk.invalid> - 2014-05-13 18:00 +0100
  Re: intercept an alert garrett.smith@acxiom.com - 2014-05-14 09:57 -0700

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