Frequently asked questions about MDN Plus, MDN Web Docs , static , this , this .() / . constructor this.constructor.() / this.constructor. . More than 1 year has passed since last update. By following users and tags, you can catch up information on technical fields that you are interested in as a whole, By "stocking" the articles you like, you can search right away. SyntaxError: test for equality (==) mistyped as assignment (=)? Visit Mozilla Corporations not-for-profit parent, the Mozilla Foundation.Portions of this content are 19982022 by individual mozilla.org contributors. Last modified: 202149, by MDN contributors. static /new, utility() (^o^), staticstatic, you can read useful information later efficiently. Why not register and get more from Qiita? TypeError: setting getter-only property "x", SyntaxError: Unexpected '#' used outside of class body, SyntaxError: identifier starts immediately after numeric literal, TypeError: cannot use 'in' operator to search for 'x' in 'y', SyntaxError: invalid assignment left-hand side, TypeError: invalid assignment to const "x", SyntaxError: for-in loop head declarations may not have initializers, SyntaxError: a declaration in the head of a for-of loop can't have an initializer, TypeError: invalid 'instanceof' operand 'x', SyntaxError: missing ] after element list, SyntaxError: missing } after function body, SyntaxError: missing } after property list, SyntaxError: missing = in const declaration, SyntaxError: missing name after . Content available under a Creative Commons license. BCD tables only load in the browser with JavaScript enabled. Help us understand the problem. Use //# instead, Warning: String.x is deprecated; use String.prototype.x instead, Warning: Date.prototype.toLocaleFormat is deprecated. What are the problem? , `eslint-plugin-vue`Vue SFC(.vue), checksum(MD5)MEMO, Ruby on RailsMEMO, . , , () , , , , , , , TypeScript 10TypeScript, , Licensed under CC BY-SA 4.0 and MIT(partially). // 'Static method and static property has been called', // 'Static method and static property has been called from another static method', Warning: -file- is being assigned a //# sourceMappingURL, but already has one, TypeError: invalid Array.prototype.sort argument, Warning: 08/09 is not a legal ECMA-262 octal constant, SyntaxError: invalid regular expression flag "x", TypeError: X.prototype.y called on incompatible type, ReferenceError: can't access lexical declaration 'X' before initialization, TypeError: can't assign to property "x" on "y": not an object, RangeError: x can't be converted to BigInt because it isn't an integer, TypeError: can't convert BigInt to number, TypeError: can't define property "x": "obj" is not extensible, TypeError: property "x" is non-configurable and can't be deleted, TypeError: can't redefine non-configurable property "x", SyntaxError: applying the 'delete' operator to an unqualified name is deprecated, ReferenceError: deprecated caller or arguments usage, Warning: expression closures are deprecated, SyntaxError: "0"-prefixed octal literals and octal escape seq. operator, SyntaxError: missing ) after argument list, RangeError: repeat count must be non-negative, TypeError: can't delete non-configurable array element, RangeError: argument is not a valid code point, Error: Permission denied to access property "x", SyntaxError: redeclaration of formal parameter "x", TypeError: Reduce of empty array with no initial value, SyntaxError: "x" is a reserved identifier, RangeError: repeat count must be less than infinity, Warning: unreachable code after return statement, SyntaxError: "use strict" not allowed in function with non-simple parameters, ReferenceError: assignment to undeclared variable "x", ReferenceError: reference to undefined property "x", SyntaxError: function statement requires a name. are deprecated, SyntaxError: Using //@ to indicate sourceURL pragmas is deprecated. Enable JavaScript to view data. 'I square the triple of any number you provide', // 81 (not affected by parent's instantiation), // 'I square the triple of any number you provide'. // This throws because calculate() is a static member, not an instance member.