@babel/plugin-transform-reserved-words

NOTE: This plugin is included in @babel/preset-env

Some words were reserved in ES3 as potential future keywords but were not reserved in ES5 and later. This plugin, to be used when targeting ES3 environments, renames variables from that set of words.

Example

In

JavaScript

var abstract = 1;
var x = abstract + 1;

Out

JavaScript

var _abstract = 1;
var x = _abstract + 1;

Installation

npm

npm install --save-dev @babel/plugin-transform-reserved-words

Yarn

yarn add --dev @babel/plugin-transform-reserved-words

pnpm

pnpm add --save-dev @babel/plugin-transform-reserved-words

Usage

With a configuration file (Recommended)

babel.config.json

{
  "plugins": ["@babel/plugin-transform-reserved-words"]
}

Via CLI

Shell

babel --plugins @babel/plugin-transform-reserved-words script.js

Via Node API

JavaScript

require("@babel/core").transformSync("code", {
  plugins: ["@babel/plugin-transform-reserved-words"],
});

References

• ES3 Spec: Future Reserved Words