Variable scope leakage in loops (e.g., var in for loops)
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….
Tag: JavaScript debugging
Uncaught Type Error: Cannot read property ‘x’ of undefined
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)….
Uncaught Syntax Error: Identifier ‘[x]’ has already been declared
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….
Uncaught Syntax Error: await is only valid in async functions
Understanding “Uncaught SyntaxError: await is only valid in async functions” in JavaScript The error “Uncaught SyntaxError: await is only valid in async functions” occurs when JavaScript encounters the await keyword….
Missing ) after argument list
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,….
Unexpected end of input
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….
Uncaught Reference Error: [variable] is not defined
The “Uncaught ReferenceError: [variable] is not defined” error in JavaScript occurs when you try to access a variable that has not been declared in the current scope. This is one….
Cannot access ‘[variable]’ before initialization
Understanding “Cannot access ‘[variable]’ before initialization” in JavaScript The “Cannot access ‘[variable]’ before initialization” error occurs in JavaScript when you attempt to use a variable before it has been initialized…..
Invalid assignment to const variable
Understanding “Invalid assignment to const variable” in JavaScript The “Invalid assignment to const variable” error occurs when you attempt to reassign a variable declared with const. In JavaScript, variables declared….
Unexpected token
The “Unexpected token” error in JavaScript occurs when the JavaScript engine encounters a character or symbol it does not expect in a given syntax context. This is a syntax error,….