Use Logpoints!

By  on  

There's sometimes a tribal attitude about how web developers should be debugging their code and solving problems. There's the console.log loyalists, then there's the debugger/breakpoint maximalists. I worked on the Firefox DevTools debugger for years and I can tell you my philosophy -- use whichever tool helps you get the job done!

I use console.log for very simple problems, other times when I want an audit trail I can analyze after a series of events to spot the problem and share with others. I use breakpoints when I want to halt execution to to see values and the visual state of the UI. One tool you can use to get the best of both worlds is logpoints, a breakpoint-like mechanism in the devtools debugger that logs instead of halts!

To add a logpoint:

  • open the devtools debugger
  • right-click a line number in a JavaScript file,
  • provide the log message accompanied by any variables you'd like in the log:

You have access to all variables in the current context, which you can add to the logpoint message.

You may be asking "why don't you just add a console.log to your source file manually? Oftentimes you need to debug third party scripts where manually editing the file isn't possible. Even if you do have access to the source file, you don't need to do a bunch of console.log cleanup!

Developer tools are always more popular than believe -- take full advantage of them!

Recent Features

  • By
    Write Simple, Elegant and Maintainable Media Queries with Sass

    I spent a few months experimenting with different approaches for writing simple, elegant and maintainable media queries with Sass. Each solution had something that I really liked, but I couldn't find one that covered everything I needed to do, so I ventured into creating my...

  • By
    Serving Fonts from CDN

    For maximum performance, we all know we must put our assets on CDN (another domain).  Along with those assets are custom web fonts.  Unfortunately custom web fonts via CDN (or any cross-domain font request) don't work in Firefox or Internet Explorer (correctly so, by spec) though...

Incredible Demos

  • By
    Animated AJAX Record Deletion Using Dojo

    I'm a huge fan of WordPress' method of individual article deletion. You click the delete link, the menu item animates red, and the item disappears. Here's how to achieve that functionality with Dojo JavaScript. The PHP - Content & Header The following snippet goes at the...

  • By
    MooTools Zebra Table Plugin

    I released my first MooTools class over a year ago. It was a really minimalistic approach to zebra tables and a great first class to write. I took some time to update and improve the class. The XHTML You may have as many tables as...

Discussion

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