Справочный материал по теме JavaScript error reference в разделе JavaScript.
Назначение
Материал описывает назначение, синтаксис, параметры и типичные сценарии применения элемента или конструкции.
Пример
JavaScript error referenceНа что обратить внимание
Проверяйте контекст использования, поддержку в браузерах и влияние на доступность. Внешний вид страницы задаёт CSS, а поведение — JavaScript.
- JavaScript: TypeError: already executing generator
- JavaScript: Warning: -file- is being assigned a //# sourceMappingURL, but already has one
- JavaScript: SyntaxError: arguments is not valid in fields
- JavaScript: TypeError: invalid Array.prototype.sort argument
- JavaScript: SyntaxError: await/yield expression can't be used in parameter
- JavaScript: SyntaxError: await is only valid in async functions, async generators and modules
- JavaScript: SyntaxError: unlabeled break must be inside loop or switch
- JavaScript: SyntaxError: continue must be inside loop
- JavaScript: SyntaxError: new keyword cannot be used with an optional chain
- JavaScript: SyntaxError: tagged template cannot be used with optional chain
- JavaScript: RangeError: radix must be an integer
- JavaScript: SyntaxError: invalid regular expression flag "x"
- JavaScript: SyntaxError: return not in function
- JavaScript: SyntaxError: 'arguments'/'eval' can't be defined or assigned to in strict mode code
- JavaScript: SyntaxError: super() is only valid in derived class constructors
- JavaScript: SyntaxError: use of super property/member accesses only valid within methods or eval code within methods
- JavaScript: RangeError: BigInt division by zero
- JavaScript: RangeError: BigInt negative exponent
- JavaScript: TypeError: BigInt value can't be serialized in JSON
- JavaScript: TypeError: calling a builtin X constructor without new is forbidden
- JavaScript: TypeError: X.prototype.y called on incompatible type
- JavaScript: ReferenceError: can't access lexical declaration 'X' before initialization
- JavaScript: TypeError: can''t assign to property "x" on "y": not an object
- JavaScript: RangeError: x can't be converted to BigInt because it isn't an integer
- JavaScript: TypeError: can't convert BigInt to number
- JavaScript: TypeError: can't convert x to BigInt
- JavaScript: TypeError: can''t define property "x": "obj" is not extensible
- JavaScript: TypeError: property "x" is non-configurable and can''t be deleted
- JavaScript: SyntaxError: private fields can't be deleted
- JavaScript: TypeError: can''t redefine non-configurable property "x"
- JavaScript: TypeError: can't set prototype of this object
- JavaScript: SyntaxError: cannot use ?? unparenthesized within || and && expressions
- JavaScript: TypeError: class constructors must be invoked with 'new'
- JavaScript: TypeError: Iterator/AsyncIterator constructor can't be used directly
- JavaScript: TypeError: cyclic object value
- JavaScript: TypeError: can't set prototype: it would cause a prototype chain cycle
- JavaScript: SyntaxError: applying the 'delete' operator to an unqualified name is deprecated
- JavaScript: TypeError: 'caller', 'callee', and 'arguments' properties may not be accessed
- JavaScript: SyntaxError: octal escape sequences can't be used in untagged template literals or in strict mode code
- JavaScript: SyntaxError: "0"-prefixed octal literals are deprecated
- JavaScript: SyntaxError: Using //@ to indicate sourceURL pragmas is deprecated. Use //# instead
- JavaScript: SyntaxError: duplicate formal argument x
- JavaScript: SyntaxError: property name __proto__ appears more than once in object literal
- JavaScript: SyntaxError: getter and setter for private name #x should either be both static or non-static
- JavaScript: RangeError: form must be one of 'NFC', 'NFD', 'NFKC', or 'NFKD'
- JavaScript: SyntaxError: functions cannot be labelled
- JavaScript: TypeError: can't access/set private field or method: object is not the right class
- JavaScript: SyntaxError: getter functions must have no arguments
- JavaScript: TypeError: setting getter-only property "x"
- JavaScript: SyntaxError: Unexpected '#' used outside of class body
- JavaScript: SyntaxError: identifier starts immediately after numeric literal
- JavaScript: SyntaxError: illegal character
- JavaScript: SyntaxError: import declarations may only appear at top level of a module
- JavaScript: TypeError: cannot use 'in' operator to search for 'x' in 'y'
- JavaScript: RangeError: invalid array length
- JavaScript: SyntaxError: invalid assignment left-hand side
- JavaScript: SyntaxError: invalid BigInt syntax
- JavaScript: TypeError: invalid assignment to const "x"
- JavaScript: RangeError: invalid date
- JavaScript: TypeError: derived class constructor returned invalid value x
- JavaScript: SyntaxError: for-in loop head declarations may not have initializers
- JavaScript: SyntaxError: a declaration in the head of a for-of loop can't have an initializer
- JavaScript: TypeError: invalid 'instanceof' operand 'x'
- JavaScript: TypeError: 'x' is not iterable
- JavaScript: SyntaxError: JSON.parse: bad parsing
- JavaScript: TypeError: WeakSet key/WeakMap value 'x' must be an object or an unregistered symbol
- JavaScript: SyntaxError: label not found
- JavaScript: URIError: malformed URI sequence
- JavaScript: SyntaxError: missing ] after element list
- JavaScript: SyntaxError: missing : after property id
- JavaScript: SyntaxError: missing } after function body
- JavaScript: SyntaxError: missing } after property list
- JavaScript: SyntaxError: missing formal parameter
- JavaScript: SyntaxError: missing = in const declaration
- JavaScript: SyntaxError: missing name after . operator
- JavaScript: SyntaxError: missing ) after argument list
- JavaScript: SyntaxError: missing ) after condition
- JavaScript: TypeError: More arguments needed
- JavaScript: RangeError: repeat count must be non-negative
- JavaScript: TypeError: "x" is not a non-null object
- JavaScript: TypeError: null/undefined has no properties
- JavaScript: SyntaxError: missing variable name
- JavaScript: TypeError: can't delete non-configurable array element
- JavaScript: TypeError: "x" is not a constructor
- JavaScript: TypeError: "x" is not a function
- JavaScript: RangeError: argument is not a valid code point
- JavaScript: ReferenceError: "x" is not defined
- JavaScript: SyntaxError: parameter after rest parameter
- JavaScript: RangeError: precision is out of range
- JavaScript: TypeError: Initializing an object twice is an error with private fields/methods
- JavaScript: TypeError: getting private setter-only property
- JavaScript: AggregateError: No Promise in Promise.any was resolved
- JavaScript: Error: Permission denied to access property "x"
- JavaScript: TypeError: "x" is read-only
- JavaScript: SyntaxError: redeclaration of formal parameter "x"
- JavaScript: TypeError: Reduce of empty array with no initial value
- JavaScript: SyntaxError: \\ at end of pattern
- JavaScript: SyntaxError: character class escape cannot be used in class range in regular expression
- JavaScript: SyntaxError: duplicate capture group name in regular expression
- JavaScript: SyntaxError: incomplete quantifier in regular expression
- JavaScript: SyntaxError: invalid capture group name in regular expression
- JavaScript: SyntaxError: invalid character in class in regular expression
- JavaScript: SyntaxError: invalid class set operation in regular expression
- JavaScript: SyntaxError: invalid decimal escape in regular expression
- JavaScript: SyntaxError: invalid regexp group
- JavaScript: SyntaxError: invalid identity escape in regular expression
- JavaScript: SyntaxError: invalid named capture reference in regular expression
- JavaScript: SyntaxError: invalid property name in regular expression
- JavaScript: SyntaxError: invalid range in character class
- JavaScript: SyntaxError: invalid unicode escape in regular expression
- JavaScript: SyntaxError: negated character class with strings in regular expression
- JavaScript: SyntaxError: nothing to repeat
- JavaScript: SyntaxError: numbers out of order in {} quantifier.
- JavaScript: SyntaxError: raw bracket is not allowed in regular expression with unicode flag
- JavaScript: TypeError: matchAll/replaceAll must be called with a global RegExp
- JavaScript: SyntaxError: "x" is a reserved identifier
- JavaScript: SyntaxError: rest parameter may not have a default
- JavaScript: RangeError: repeat count must be less than infinity
- JavaScript: SyntaxError: setter functions must have one argument
- JavaScript: Warning: unreachable code after return statement
- JavaScript: SyntaxError: "use strict" not allowed in function with non-simple parameters
- JavaScript: SyntaxError: string literal contains an unescaped line break
- JavaScript: ReferenceError: super() called twice in derived class constructor
- JavaScript: ReferenceError: must call super constructor before using 'this' in derived class constructor
- JavaScript: InternalError: too much recursion
- JavaScript: SyntaxError: reference to undeclared private field or method #x
- JavaScript: ReferenceError: assignment to undeclared variable "x"
- JavaScript: SyntaxError: Unexpected token
- JavaScript: TypeError: "x" is (not) "y"
- JavaScript: SyntaxError: function statement requires a name
- JavaScript: SyntaxError: unparenthesized unary expression can't appear on the left-hand side of '**'