new Function() Unexpected Closures – A Detailed Guide The new Function() constructor in JavaScript dynamically creates functions at runtime. However, unlike regular function expressions or arrow functions, it has some….
Understanding IndexedDB Transaction Auto-Commit Timing Out in JavaScript When working with IndexedDB in JavaScript, it’s crucial to handle transactions carefully to avoid common issues such as auto-commit timeouts. Auto-commit refers….
🚨 Using with Statement in Strict Mode in JavaScript 🚨 📌 Introduction The with statement in JavaScript allows access to an object’s properties without repeating the object name. However, it….
Understanding “Duplicated Parameter Names” in JavaScript 📌 Introduction In JavaScript, function parameters must have unique names. If you define a function with duplicate parameter names, it can lead to unexpected….
Understanding “Assignment to Read-Only Global (e.g., undefined = 5)” in JavaScript 📌 Introduction In JavaScript, some global variables such as undefined, NaN, and Infinity are read-only, meaning they cannot be….
Understanding for…in Iterating Over Prototype Properties in JavaScript 📌 Introduction JavaScript provides multiple ways to iterate over object properties, one of which is the for…in loop. However, a common mistake….
Using == to Compare Objects/Arrays in JavaScript: A Comprehensive Guide 📌 Introduction JavaScript provides two main comparison operators: When dealing with objects and arrays, many developers mistakenly use == (or….
array.map() Not Returning Expected Results in JavaScript: A Comprehensive Guide 📌 Introduction The array.map() method is a powerful tool in JavaScript used for transforming arrays by applying a function to….
Shallow Copies Causing Unintended Mutations in JavaScript: A Complete Guide 📌 Introduction In JavaScript, when working with objects and arrays, making a shallow copy instead of a deep copy can….
Understanding CORS Errors in API Requests (Cross-Origin Resource Sharing) Introduction CORS (Cross-Origin Resource Sharing) is a security feature implemented in web browsers to prevent malicious scripts from making unauthorized requests….
