Category: Java Script

Understanding Hoisting Leading to Unexpected Values in JavaScript Step 1: What is Hoisting? Hoisting is a JavaScript behavior where variable and function declarations are moved (“hoisted”) to the top of….

Understanding Global Variable Pollution in JavaScript Step 1: What is Global Variable Pollution? Global variable pollution occurs when too many variables are declared in the global scope, leading to: Example….

Understanding “this Context Lost in Callbacks” in JavaScript Step 1: Understanding this in JavaScript In JavaScript, this refers to the context in which a function is executed. The value of….

Understanding “Closure Capturing the Wrong Value in Loops” in JavaScript Step 1: What is a Closure? A closure in JavaScript is a function that remembers the variables from its parent….

Understanding Variable Scope Leakage in Loops (var in for Loops) in JavaScript In JavaScript, variable scope leakage in loops occurs when a variable declared inside a loop with var is….

Understanding “Uncaught TypeError: Cannot read property ‘x’ of undefined” in JavaScript The error “Uncaught TypeError: Cannot read property ‘x’ of undefined” occurs when JavaScript tries to access a property (x)….

Understanding “Uncaught SyntaxError: Identifier ‘[x]’ has already been declared” in JavaScript The error “Uncaught SyntaxError: Identifier ‘[x]’ has already been declared” occurs when JavaScript tries to declare a variable with….

Understanding “Missing ) After Argument List” in JavaScript The “Missing ) after argument list” error in JavaScript is a SyntaxError that occurs when JavaScript encounters an issue with function calls,….

Understanding “Unexpected end of input” in JavaScript The “Unexpected end of input” error occurs in JavaScript when the interpreter reaches the end of a script or code block unexpectedly, meaning….