JavaScript ECMAScript errors
JavaScript ECMAScript のエラーに関する言語リファレンス情報をまとめたカテゴリです。
error の一覧
AggregateError: No Promise in Promise.any was resolved
Error: Permission denied to access property "x"
InternalError: too much recursion
RangeError: argument is not a valid code point
RangeError: BigInt division by zero
RangeError: BigInt negative exponent
RangeError: form must be one of 'NFC', 'NFD', 'NFKC', or 'NFKD'
RangeError: invalid array length
RangeError: invalid date
RangeError: precision is out of range
RangeError: radix must be an integer
RangeError: repeat count must be less than infinity
RangeError: repeat count must be non-negative
RangeError: x can't be converted to BigInt because it isn't an integer
ReferenceError: "x" is not defined
ReferenceError: assignment to undeclared variable "x"
ReferenceError: can't access lexical declaration 'X' before initialization
ReferenceError: must call super constructor before using 'this' in derived class constructor
ReferenceError: super() called twice in derived class constructor
SyntaxError: "0"-prefixed octal literals are deprecated
SyntaxError: "use strict" not allowed in function with non-simple parameters
SyntaxError: "x" is a reserved identifier
SyntaxError: 'arguments'/'eval' can't be defined or assigned to in strict mode code
SyntaxError: \ at end of pattern
SyntaxError: a declaration in the head of a for-of loop can't have an initializer
SyntaxError: applying the 'delete' operator to an unqualified name is deprecated
SyntaxError: arguments is not valid in fields
SyntaxError: await is only valid in async functions, async generators and modules
SyntaxError: await/yield expression can't be used in parameter
SyntaxError: cannot use `??` unparenthesized within `||` and `&&` expressions
SyntaxError: character class escape cannot be used in class range in regular expression
SyntaxError: continue must be inside loop
SyntaxError: duplicate capture group name in regular expression
SyntaxError: duplicate formal argument x
SyntaxError: for-in loop head declarations may not have initializers
SyntaxError: function statement requires a name
SyntaxError: functions cannot be labelled
SyntaxError: getter and setter for private name #x should either be both static or non-static
SyntaxError: getter functions must have no arguments
SyntaxError: identifier starts immediately after numeric literal
SyntaxError: illegal character
SyntaxError: import declarations may only appear at top level of a module
SyntaxError: incomplete quantifier in regular expression
SyntaxError: invalid assignment left-hand side
SyntaxError: invalid BigInt syntax
SyntaxError: invalid capture group name in regular expression
SyntaxError: invalid character in class in regular expression
SyntaxError: invalid class set operation in regular expression
SyntaxError: invalid decimal escape in regular expression
SyntaxError: invalid identity escape in regular expression
SyntaxError: invalid named capture reference in regular expression
SyntaxError: invalid property name in regular expression
SyntaxError: invalid range in character class
SyntaxError: invalid regexp group
SyntaxError: invalid regular expression flag "x"
SyntaxError: invalid unicode escape in regular expression
SyntaxError: JSON.parse: bad parsing
SyntaxError: label not found
SyntaxError: missing ) after argument list
SyntaxError: missing ) after condition
SyntaxError: missing : after property id
SyntaxError: missing = in const declaration
SyntaxError: missing ] after element list
SyntaxError: missing formal parameter
SyntaxError: missing name after . operator
SyntaxError: missing variable name
SyntaxError: missing } after function body
SyntaxError: missing } after property list
SyntaxError: negated character class with strings in regular expression
SyntaxError: new keyword cannot be used with an optional chain
SyntaxError: nothing to repeat
SyntaxError: numbers out of order in {} quantifier.
SyntaxError: octal escape sequences can't be used in untagged template literals or in strict mode code
SyntaxError: parameter after rest parameter
SyntaxError: private fields can't be deleted
SyntaxError: property name __proto__ appears more than once in object literal
SyntaxError: raw bracket is not allowed in regular expression with unicode flag
SyntaxError: redeclaration of formal parameter "x"
SyntaxError: reference to undeclared private field or method #x
SyntaxError: rest parameter may not have a default
SyntaxError: return not in function
SyntaxError: setter functions must have one argument
SyntaxError: string literal contains an unescaped line break
SyntaxError: super() is only valid in derived class constructors
SyntaxError: tagged template cannot be used with optional chain
SyntaxError: Unexpected '#' used outside of class body
SyntaxError: Unexpected token
SyntaxError: unlabeled break must be inside loop or switch
SyntaxError: unparenthesized unary expression can't appear on the left-hand side of '**'
SyntaxError: use of super property/member accesses only valid within methods or eval code within methods
SyntaxError: Using //@ to indicate sourceURL pragmas is deprecated. Use //# instead
TypeError: "x" is (not) "y"
TypeError: "x" is not a constructor
TypeError: "x" is not a function
TypeError: "x" is not a non-null object
TypeError: "x" is read-only
TypeError: 'caller', 'callee', and 'arguments' properties may not be accessed
TypeError: 'x' is not iterable
TypeError: already executing generator
TypeError: BigInt value can't be serialized in JSON
TypeError: calling a builtin X constructor without new is forbidden
TypeError: can't access/set private field or method: object is not the right class
TypeError: can't assign to property "x" on "y": not an object
TypeError: can't convert BigInt to number
TypeError: can't convert x to BigInt
TypeError: can't define property "x": "obj" is not extensible
TypeError: can't delete non-configurable array element
TypeError: can't redefine non-configurable property "x"
TypeError: can't set prototype of this object
TypeError: can't set prototype: it would cause a prototype chain cycle
TypeError: cannot use 'in' operator to search for 'x' in 'y'
TypeError: class constructors must be invoked with 'new'
TypeError: cyclic object value
TypeError: derived class constructor returned invalid value x
TypeError: getting private setter-only property
TypeError: Initializing an object twice is an error with private fields/methods
TypeError: invalid 'instanceof' operand 'x'
TypeError: invalid Array.prototype.sort argument
TypeError: invalid assignment to const "x"
TypeError: Iterator/AsyncIterator constructor can't be used directly
TypeError: matchAll/replaceAll must be called with a global RegExp
TypeError: More arguments needed
TypeError: null/undefined has no properties
TypeError: property "x" is non-configurable and can't be deleted
TypeError: Reduce of empty array with no initial value
TypeError: setting getter-only property "x"
TypeError: WeakSet key/WeakMap value 'x' must be an object or an unregistered symbol
TypeError: X.prototype.y called on incompatible type
URIError: malformed URI sequence
Warning: -file- is being assigned a //# sourceMappingURL, but already has one
Warning: unreachable code after return statement