The TrackJS Blog
Debugging Articles
The State of Client-Side JavaScript Errors
As JavaScript has grown more prevalent on the web, so have JavaScript errors. Here are the top JavaScript errors from across the web, aggregated by browser, framework, and issue.
Debugging: "Failed to construct 'Request': Invalid Argument." in Edge
Nothing changed in your code. All of a sudden, a tidal wave of errors start happening for Microsoft Edge users. What the heck happened? On August 28th, 2019, many TrackJS customers saw a sudden su...
Debugging: Slow Network Requests and "Cannot read property 'id' of undefined"
We understand the value of JavaScript error monitoring here at TrackJS. Consequently, we run TrackJS on all of our own web properties to log our JS errors. We’re dilligent about fixing errors as th...
Debugged: Debugging Empty String
Empty String. An infuriatingly vague error message that leaves few clues about what’s going wrong. A customer recently experienced a lot of these, and asked for our help debugging it. This is that ...
Common Redux Bugs
Redux is an amazing JavaScript library that has become mainstream because of its simplicity, tiny 2kb size, and excellent documentation. Redux assists developers to manage state in JavaScript appli...
Internet Explorer 11 Crash on JSON.stringify
Internet Explorer 11 crashes when JSON.stringify is called on an HTMLFormElement that contains duplicate named inputs. This is particularly concerning because radio inputs will certainly have dupli...
Debugging JavaScript in Production
The web is a hostile place and our JavaScript apps will inevitably break. Browser changes, invasive plugins, unstable networks, or just plain bugs—something is going to go wrong. When it does, we n...
Debugged: "nsresult: 0x805e0006" on Firefox
In Mozilla Firefox, a request to load an external origin was attempted and externally blocked. The request could have been canceled by a browser extension, such as an adblocker or antivirus, or bec...
Debugged: "Attempted to assign to readonly property." iOS 8 TypeError
A webkit bug that shipped in iOS 8 beta 5 and appears to have been partially included in the launch of iOS 8 and 8.1 is affecting many of our customers. It does not seem to impact all iOS8 uniforml...
