Side-by-side comparison of RangeError and TypeError — understand the differences, causes, and fixes.
AkousaRangeErrorA value is not within the expected range, such as an invalid array length or exceeding the call stack size.
A numeric value or other parameter is outside the set of allowed values. This includes passing negative numbers where positive is required, exceeding recursion limits, or using values outside precision bounds.
Validate inputs before passing them to functions. Add bounds checking for numeric values. If caused by recursion, add a base case or convert to iteration.
TypeErrorA value is not of the expected type. This is the most common JavaScript error, occurring when an operation encounters a value of the wrong type.
You attempted to use a value in a way that is incompatible with its type. Common examples include calling a non-function, accessing properties of null/undefined, or passing the wrong argument type to a built-in method.
Check the variable's actual type using typeof or console.log before the failing operation. Add null/undefined checks. Use optional chaining (?.) for potentially null values. Verify function arguments match expected types.