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TrackJS

@trackjs.com

JavaScript Error Monitoring. The fastest and easiest way to make your website better. 👉 https://trackjs.com/

24 Posts29 Follower10 Folgt
TrackJS@trackjs.com · 5mo ago

SSL certificates are dropping to 47-day lifetimes. That annual renewal checklist isn't going to work anymore. We built CertKit to solve this for ourselves, and now it's open for everyone. trackjs.com/blog/introdu... #SSL #DevOps

Introducing CertKit: SSL Certificate Automation for the Rest of Us

SSL certificate lifetimes are dropping to 47 days, and your annual renewal checklist isn't going to cut it anymore. We built CertKit to solve this for ourselves, and today we're opening it up to every...

trackjs.com

TrackJS@trackjs.com · 6mo ago

Whatever autocomplete casino your team is using this week, the bug report still lands on your desk like you wrote it yourself. Here's how to debug code you didn't write (and didn't break). trackjs.com/blog/how-to-debug-code-you-didnt-write/ #JavaScript #debugging

How to Debug Code You Didn’t Write (your AI did)

AI-generated code looks great in the diff and breaks on the first edge case. Here’s how to debug JavaScript you didn’t write without reverse-engineering someone else’s bad assumptions.

trackjs.com

TrackJS@trackjs.com · 6mo ago

Vibe coding ships fast. Then prod finds the one weird browser + slow network combo and your “looks fine” code catches fire. You can’t code review vibes, you need production visibility. trackjs.com/blog/who-wat... #JavaScript #WebDev

Who Watches the Vibe Coder?

AI is shipping JavaScript faster than humans can review it. And a lot of it is “looks fine to me” code that explodes in production. You can’t code review vibes, so you need production visibility.

trackjs.com

TrackJS@trackjs.com · 7mo ago

Safari throwing “undefined is not an object (evaluating 'window.webkit.messageHandlers')”? It’s not random. It’s WKWebView doing WKWebView things. What it means, why it happens, and how to fix it: trackjs.com/javascript-e... #javascript #safari

How to fix `undefined is not an object (evaluating 'window.webkit.messageHandlers')`

Safari throws this when JavaScript tries to call the WKWebView native bridge, but the page is running in a normal browser context where `window.webkit.messageHandlers` doesn't exist. Fix it with featu...

trackjs.com

TrackJS@trackjs.com · 7mo ago

Unexpected end of input errors in production? Your code is fine. The server returned nothing when your JSON parser expected data. Empty responses, HTML error pages, truncated network calls. trackjs.com/javascript-e... #JavaScript #WebDev

How to fix `Unexpected end of input`

JavaScript parser error when code or JSON data is incomplete. Often caused by missing brackets, empty API responses, or truncated scripts. Quick fixes: check for unclosed braces, validate JSON before ...

trackjs.com

TrackJS@trackjs.com · 7mo ago

Firefox throws "undefined has no properties" when you destructure null or undefined. It's the least helpful error message of all browsers for this problem. What's happening and how to fix it: trackjs.com/javascript-e... #JavaScript #Firefox

How to fix `undefined has no properties`

Firefox's error when destructuring null or undefined values. Common with API responses, missing function arguments, or async data not yet loaded. Quick fixes: add fallback objects, use default paramet...

trackjs.com

TrackJS@trackjs.com · 8mo ago

Destructuring fails loud. That's actually good. Unlike dot notation that silently returns undefined, destructuring throws immediately when data is missing. Catches bugs faster. trackjs.com/javascript-e... #javascript #webdev

How to fix `Cannot destructure property 'x' of 'y' as it is undefined`

Chrome error when destructuring properties from undefined objects. Common with API responses, function parameters, and React hooks. Quick fixes: add default values, use optional chaining, validate dat...

trackjs.com

TrackJS@trackjs.com · 8mo ago

"Right side of assignment cannot be destructured" is Safari's way of saying you tried to destructure null or undefined. Chrome tells you which property failed. Safari makes you guess. trackjs.com/javascript-errors/right-side-of-assignment-cannot-be-destructured/ #javascript #webdev

How to fix `Right side of assignment cannot be destructured`

Safari's error message when destructuring null or undefined values. Common with API responses, missing function arguments, or async data not yet loaded. Quick fixes: add fallback objects, use optional...

trackjs.com

TrackJS@trackjs.com · 8mo ago

Seeing a sudden spike of 404 errors for ads.txt, security.txt, and /.well-known/ files? It's probably @httparchive.org Almanac scanning with WebPageTest Not a bug, just bot noise. trackjs.com/javascript-e... #javascript #webdev

How to fix 404 Errors from WebPageTest.org Bot

404 errors from WebPageTest.org bot checking for well-known configuration files like ads.txt, security.txt, and sellers.json. Appears in JavaScript error monitoring because WebPageTest uses real Chrom...

trackjs.com

TrackJS@trackjs.com · 9mo ago

"Cannot read properties of null (reading 'length')" is everywhere. That null tells you something: an API returned "not found." Here's how to track it down and fix it. trackjs.com/javascript-errors/cannot-read-properties-of-null-reading-length/ #javascript #webdev

How to fix `Cannot read properties of null (reading 'length')`

Common JavaScript error when accessing length on null values. Usually caused by DOM APIs like getElementById or querySelector returning null when elements don't exist, or localStorage returning null f...

trackjs.com

TrackJS@trackjs.com · 9mo ago

The worst JavaScript errors are the ones you can't see. "Invalid or unexpected token" usually means invisible characters snuck into your code. Smart quotes from Slack, zero-width spaces, BOM markers. trackjs.com/javascript-e... #javascript #webdev

How to fix `Invalid or unexpected token`

JavaScript parser error when it encounters unrecognizable characters. Usually caused by invisible Unicode characters, smart quotes from copy-paste, or BOM markers. Different from "Unexpected token X" ...

trackjs.com

TrackJS@trackjs.com · 9mo ago

Safari's "string did not match the expected pattern" is infuriating. One vague message for five different problems. CSS selectors, JSON parsing, DOM values, all the same unhelpful text. trackjs.com/javascript-e... #JavaScript #Safari

How to fix "The string did not match the expected pattern."

Safari's generic error when DOM APIs receive invalid string arguments. Triggers include invalid CSS selectors, JSON parsing failures, contentEditable with bad values, and Performance.measure() issues....

trackjs.com

TrackJS@trackjs.com · 9mo ago

Your JavaScript tried to use localStorage in a sandboxed iframe and now the browser is yelling at you. "The operation is insecure" is rarely a real bug, it's just browsers being paranoid about security contexts. trackjs.com/javascript-errors/the-operation-is-insecure/ #JavaScript #WebDev

How to fix `The operation is insecure`

Browser security error when JavaScript attempts restricted operations in non-secure contexts. Common with localStorage in iframes, geolocation on HTTP, or cross-origin operations. Quick fixes: use HTT...

trackjs.com

TrackJS@trackjs.com · 10mo ago

Your monitoring dashboard flooded with Facebook Privacy Sandbox errors? They're not bugs. They're privacy tools doing their job. Stop wasting time fixing user privacy choices. trackjs.com/javascript-e... #JavaScript #WebDev

How to fix `Failed to fetch: Facebook Privacy Sandbox`

Network error when Facebook's Topics API registration fails. Common with ad blockers and privacy extensions. Topics is Facebook's implementation of Privacy Sandbox interest-based advertising. No user ...

trackjs.com

TrackJS@trackjs.com · 10mo ago

MetaMask throwing connection errors in your logs? You're not alone. These extension errors pollute your monitoring with noise that isn't even your fault. We show you how to filter them out automatically. Read more: trackjs.com/javascript-e... #JavaScript #WebDev

How to fix `Failed to connect to MetaMask`

Browser extension error from visitors using MetaMask cryptocurrency wallet. Extension attempts to inject Web3 functionality into all pages, causing errors unrelated to your site. Safe to ignore via er...

trackjs.com

Todd H. Gardner@toddhgardner.com · 11mo ago

I have no idea if this works, but I did my very first Press Release today! I'm not really sure what to expect with it -- probably nothing lol. But I think we're doing something really interesting with @certkit.io . www.einpresswire.com/article/8583...

CA Alternative Launches Free Beta for 47-Day Certificate Lifetime Reduction

Platform enables Let's Encrypt free certificates at scale, replacing expensive enterprise tools and error-prone scripts ahead of certificate lifespan reductions

einpresswire.com

Request Metrics@requestmetrics.com · last yr.

That moment when your Lighthouse score is 💯 but users are still complaining about slow pages... Stop guessing, start measuring what they actually experience. https://requestmetrics.com/web-performance/you-need-rum-to-understand-web-perf/ #WebDev #Performance

Why You Need Real User Monitoring to Really Understand Your Web Performance

Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...

requestmetrics.com