Suggest using named capture group in regular expression (prefer-named-capture-group)

建议在正则表达式中使用命名捕获组 (prefer-named-capture-group)

With the landing of ECMAScript 2018, named capture groups can be used in regular expressions, which can improve their readability.

随着 ECMAScript 2018 的发布,命名捕获组可以用于正则表达式中,这可以提高正则表达式的可读性。

const regex = /(?<year>[0-9]{4})/;

Rule Details

This rule is aimed at using named capture groups instead of numbered capture groups in regular expressions.


Examples of incorrect code for this rule:

错误 代码示例:

/*eslint prefer-named-capture-group: "error"*/

const foo = /(ba[rz])/;
const bar = new RegExp('(ba[rz])');
const baz = RegExp('(ba[rz])');

foo.exec('bar')[1]; // Retrieve the group result.

Examples of correct code for this rule:

正确 代码示例:

/*eslint prefer-named-capture-group: "error"*/

const foo = /(?<id>ba[rz])/;
const bar = new RegExp('(?<id>ba[rz])');
const baz = RegExp('(?<id>ba[rz])');

foo.exec('bar'); // Retrieve the group result.

When Not To Use It

If you are targeting ECMAScript 2017 and/or older environments, you can disable this rule, because this ECMAScript feature is only supported in ECMAScript 2018 and/or newer environments.

如果您的目标是 ECMAScript 2017 和/或 更旧的环境,你可以禁用这个规则,因为这个 ECMAScript 特性只在ECMAScript 2018 和/或 更新的环境中受支持。


This rule was introduced in ESLint 5.15.0.

该规则在 ESLint 5.15.0 中被引入。