Why querySelector Returns null in JavaScript
Debug querySelector returning null in JavaScript by checking selector syntax, DOM timing, missing elements, search scope, and querySelectorAll differences.
Articles
Front‑end Development, page 24 of 24
Front‑end development is where product intent becomes the interface people actually use. My writing approaches it as engineering rather than surface decoration, with attention to browser behaviour and code that remains accessible, fast, and safe for a team to change.
Why querySelector Returns null in JavaScript. Why
How to Check an Element Exists with and Without jQuery. How to Check an Element Exists with and Without jQuery
Check whether an element exists with jQuery or vanilla JavaScript before running DOM code, avoiding null errors and fragile client‑side behaviour.
A Simple Popup Window Using jQuery. A Simple Popup Window Using jQuery
Opening a new browser window programmatically on‑click is very simple to achieve with jQuery, and no more complex to achieve with vanilla JavaScript too!
Setting CSS Blur Filter to Zero on a Retina Screen. Setting CSS Blur Filter to Zero on a Retina Screen
A bug in the WebKit engine that only affects website Retina screen devices means that setting a zero‑blur filter in CSS isn't as easy as it should be.
