Override window.alert

By  on  

For years the only bit of feedback web developers could get was via alert("{str}") calls. These days we have the web console but, in rare cases, we don't have a console and alert calls are our only window into a value at a given time.

One problem: if an alert sneaks into production code, your site looks like it's been hacked. Your site looks like it's malware! To prevent any of those issues, you can add this snippet to your production build:

window.alert = console.log

This tiny line of JavaScript could save your site from catastrophe. There are many cases for overriding native functionality and this is a great example!

Recent Features

  • By
    How I Stopped WordPress Comment Spam

    I love almost every part of being a tech blogger:  learning, preaching, bantering, researching.  The one part about blogging that I absolutely loathe:  dealing with SPAM comments.  For the past two years, my blog has registered 8,000+ SPAM comments per day.  PER DAY.  Bloating my database...

  • By
    Being a Dev Dad

    I get asked loads of questions every day but I'm always surprised that they're rarely questions about code or even tech -- many of the questions I get are more about non-dev stuff like what my office is like, what software I use, and oftentimes...

Incredible Demos

  • By
    Printing MooTools Accordion Items

    Sometimes we're presented with unforeseen problems when it comes to our JavaScript effects. In this case, I'm talking about printing jQuery and MooTools accordions. Each "closed" accordion content element has its height set to 0 which means it will be hidden when the...

  • By
    Retrieve Your Gmail Emails Using PHP and IMAP

    Grabbing emails from your Gmail account using PHP is probably easier than you think. Armed with PHP and its IMAP extension, you can retrieve emails from your Gmail account in no time! Just for fun, I'll be using the MooTools Fx.Accordion plugin...

Discussion

  1. jonathan santos

    it’s an interesting idea, and I’m not saying the world is perfect, but if instead of using this to avoid pushing debug code onto production, how would I go about testing for stuff like alerts and other weird edge cases

  2. Mr P

    In older IE browsers the browser will crash if console.log is called when the debug window is closed. Will this work then?

  3. dev

    override window.alert in IE for logggint using $.ajax to call WebService or REST API ?

Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!