Eval security risks and performance issues
Understanding eval() Security Risks and Performance Issues in JavaScript 1. Introduction to eval() The eval() function in JavaScript takes a string as an argument and executes it as JavaScript code…..
Category: Java Script
With statement causing scope confusion
with Statement Causing Scope Confusion in JavaScript The with statement in JavaScript is considered problematic because it can lead to scope confusion and unpredictable behavior. Due to these issues, it….
Proto deprecation in favor of Object.getPrototypeOf
__proto__ Deprecation in Favor of Object.getPrototypeOf() In JavaScript, the __proto__ property was historically used to access or modify the prototype of an object. However, this approach is now deprecated due….
Uncaught Reference Error: process is not defined (Browser)
Uncaught ReferenceError: process is not defined (Browser) This error occurs when JavaScript code running in a browser environment tries to access process, which is a global object available in Node.js….
XMLHttp Request deprecated in favor of fetch
XMLHttpRequest Deprecated in Favor of Fetch: A Detailed Explanation Introduction XMLHttpRequest (XHR) has been a core part of web development for decades, allowing developers to send and receive data from….
File Reader failing to read large files
FileReader Failing to Read Large Files in JavaScript When working with file uploads in JavaScript, the FileReader API allows reading file contents asynchronously as ArrayBuffer, BinaryString, DataURL, or Text. However,….
Blob URLs not revoked, causing memory leaks
Blob URLs Not Revoked, Causing Memory Leaks Introduction In JavaScript, Blob URLs (also known as object URLs) are temporary URLs created by the browser to reference Blob or File objects…..
Performance.now() discrepancies in workers
performance.now() Discrepancies in Workers – A Detailed Explanation Introduction The performance.now() method provides high-resolution timestamps with better precision than Date.now(). However, when used in Web Workers, discrepancies may arise due….
new URL() throwing errors for invalid URLs
new URL() Throwing Errors for Invalid URLs: A Detailed Guide Overview The new URL() constructor in JavaScript is used to create a new URL object. However, if an invalid URL….
Uncaught TypeError: Illegal constructor (e.g., new Image)
Uncaught TypeError: Illegal constructor (e.g., new Image) in JavaScript In JavaScript, encountering the error “Uncaught TypeError: Illegal constructor” can be frustrating, especially when trying to instantiate certain objects or classes….