Disallow Symbol Constructor (no-new-symbol)

禁止 Symbolnew 操作符和 new 一起使用 (no-new-symbol)

The "extends": "eslint:recommended" property in a configuration file enables this rule.

配置文件中的 "extends": "eslint:recommended" 属性启用了此规则。

Symbol is not intended to be used with the new operator, but to be called as a function.

Symbol 不和 new 操作符一起使用，而是作为函数调用。

var foo = new Symbol("foo");

This throws a TypeError exception.

这会抛出 TypeError 异常。

Rule Details

This rule is aimed at preventing the accidental calling of Symbol with the new operator.

该规则旨在阻止使用 new 操作符调用 Symbol。

Examples

Examples of incorrect code for this rule:

错误 代码示例：

/*eslint no-new-symbol: "error"*/
/*eslint-env es6*/

var foo = new Symbol('foo');

Examples of correct code for this rule:

正确 代码示例：

/*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.

该规则不应在 ES3/5 环境中使用。

Further Reading

Version

This rule was introduced in ESLint 2.0.0-beta.1.

该规则在 ESLint 2.0.0-beta.1 中被引入。

Resources