Disallow Symbol Constructor (no-new-symbol)
The "extends": "eslint:recommended"
property in a configuration file enables this rule.
Symbol
is not intended to be used with the new
operator, but to be called as a function.
var foo = new Symbol("foo");
This throws a TypeError
exception.
Rule Details
This rule is aimed at preventing the accidental calling of Symbol
with the new
operator.
Examples
Examples of incorrect code for this rule:
/*eslint no-new-symbol: "error"*/
/*eslint-env es6*/
var foo = new Symbol('foo');
Examples of correct code for this rule:
/*eslint no-new-symbol: "error"*/
/*eslint-env es6*/
var foo = Symbol('foo');
// Ignores shadowed Symbol.
function bar(Symbol) {
const baz = new Symbol("baz");
}
When Not To Use It
This rule should not be used in ES3/5 environments.
Further Reading
Version
This rule was introduced in ESLint 2.0.0-beta.1.