no-extra-new.md

no-extra-new

The rule no-extra-new disallows unnecessary usages of the the new syntax.

The following built-in constructors can be called equally with or without new syntax:

• AggregateError (since ECMAScript 2021)
• Array
• Error
• EvalError
• Function
• Object
• RangeError
• ReferenceError
• RegExp
• SyntaxError
• TypeError
• URIError

Examples

Examples of incorrect code for this rule

/* eslint @origin-1/no-extra-new: "error" */

var array = new Array(42);
var fn = new Function;
var obj = new Object('foo');
var regExp = new RegExp('\\d', 'g');
throw new TypeError();

Examples of correct code for this rule

/* eslint @origin-1/no-extra-new: "error" */

var array = Array(42);
var fn = Function();
var obj = Object('foo');
var regExp = RegExp('\\d', 'g');
throw TypeError();

function throwNew(Error)
{
    throw new Error(); // New expressions with a variable as callee are allowed.
}

Superseded core ESLint rules

• no-new-object