@babel/plugin-transform-named-capturing-groups-regex
NOTE: This plugin generates code that needs ES6 regular expressions functionalities. If you need to support older browsers, use either the
runtime: falseoption or import a proper polyfill (e.g.core-js).
Examples
In
var re = /(?<year>\d{4})-(?<month>\d{2})-(?<day>\d{2})/;
console.log(re.exec("1999-02-29").groups.year)
Out
var re = _wrapRegExp(/(\d{4})-(\d{2})-(\d{2})/, { year: 1, month: 2, day: 3 });
console.log(re.exec("1999-02-29").groups.year)
Installation
npm install --save-dev @babel/plugin-transform-named-capturing-groups-regex
Usage
With a configuration file (Recommended)
{
"plugins": ["@babel/plugin-transform-named-capturing-groups-regex"]
}
Via CLI
babel --plugins @babel/plugin-transform-named-capturing-groups-regex script.js
Via Node API
require("@babel/core").transform("code", {
plugins: ["@babel/plugin-transform-named-capturing-groups-regex"]
});
Options
runtime
boolean, defaults to true
When this option is disabled, Babel doesn't wrap RegExps with the _wrapRegExp helper.
The output only supports internal group references, and not runtime properties:
var stringRe = /(?<quote>"|').*?\k<quote>/;
stringRe.test("'foo'"); // "true", works
stringRe.exec("'foo'").groups.quote; // Error
You can read more about configuring plugin options here