Tag: JavaScript performance issues

Uncaught Reference Error: selector is not defined – A variable used for selection is undefined.

Posted on April 3, 2025April 3, 2025 by Zubair Shaik

Introduction: Understanding the “Uncaught ReferenceError: selector is not defined” Error In JavaScript, the “Uncaught ReferenceError: selector is not defined” error typically occurs when a variable or identifier is referenced in….

jQuery

Uncaught Type Error: document.getElementById(…) is null – Element with the specified ID does not exist.

Posted on April 3, 2025April 3, 2025 by Zubair Shaik

Introduction: Understanding the “Uncaught TypeError: document.getElementById(…) is null” Error In JavaScript, document.getElementById() is a commonly used method to access elements in the DOM (Document Object Model) by their unique id….