Syntax errors

Browse documented syntax errors across products, tools, and platforms.

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SyntaxError: missing ) after argument list

JavaScript call or expression is missing a closing parenthesisJavaScript

SyntaxError: missing = in const declaration

JavaScript const declaration is missing an initializerJavaScript

SyntaxError: duplicate formal argument

JavaScript function declared the same parameter twiceJavaScript

SyntaxError: Unexpected token

JavaScript parser hit an unexpected tokenJavaScript

SyntaxError: return not in function

JavaScript return statement is outside a functionJavaScript

SyntaxError: string literal contains an unescaped line break

JavaScript string literal contains an unescaped line breakJavaScript

SyntaxError: invalid assignment left-hand side

JavaScript tried to assign to something that is not assignableJavaScript

SyntaxError: await is only valid in async functions, async generators and modules

JavaScript used await outside a valid async contextJavaScript

Syntax Errors | Error Atlas