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

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

Out

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

Installation​

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

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

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

Usage​

With a configuration file (Recommended)​

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

Via CLI​

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

Via Node API​

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

References​

• ES3 Spec: Future Reserved Words