Syntax errors
Browse documented syntax errors across products, tools, and platforms.
SyntaxError: missing ) after argument list
JavaScript call or expression is missing a closing parenthesisJavaScript
SyntaxError: missing = in const declarationJavaScript const declaration is missing an initializerJavaScript
SyntaxError: duplicate formal argumentJavaScript function declared the same parameter twiceJavaScript
SyntaxError: Unexpected tokenJavaScript parser hit an unexpected tokenJavaScript
SyntaxError: return not in functionJavaScript return statement is outside a functionJavaScript
SyntaxError: string literal contains an unescaped line breakJavaScript string literal contains an unescaped line breakJavaScript
SyntaxError: invalid assignment left-hand sideJavaScript tried to assign to something that is not assignableJavaScript
SyntaxError: await is only valid in async functions, async generators and modulesJavaScript used await outside a valid async contextJavaScript