Synta圎rror: for-in loop head declarations may not have initializers.Synta圎rror: continue must be inside loop.Synta圎rror: cannot use `?` unparenthesized within `||` and `&` expressions.Synta圎rror: await is only valid in async functions, async generators and modules.Synta圎rror: applying the 'delete' operator to an unqualified name is deprecated.Synta圎rror: a declaration in the head of a for-of loop can't have an initializer.Synta圎rror: 'x' is a reserved identifier.Synta圎rror: 'use strict' not allowed in function with non-simple parameters.Synta圎rror: '0'-prefixed octal literals and octal escape seq.ReferenceError: reference to undefined property 'x'.ReferenceError: deprecated caller or arguments usage.ReferenceError: can't access lexical declaration 'X' before initialization.ReferenceError: assignment to undeclared variable 'x'.RangeError: x can't be converted to BigInt because it isn't an integer.

RangeError: repeat count must be non-negative.

RangeError: repeat count must be less than infinity.

RangeError: argument is not a valid code point.

Error: Permission denied to access property 'x'.

Enumerability and ownership of properties.

Javascript for loop