babel/packages/babel-plugin-transform-strict-mode/README.md

babel-plugin-transform-strict-mode

Add the "use strict"; directive to the top of your files if it is not there already.

This plugin may be enabled via babel-plugin-transform-es2015-modules-commonjs. If you wish to disable it you can either turn strict off or pass strictMode: false as an option to the commonjs transform.

Installation

$ npm install babel-plugin-transform-strict-mode

Usage

Via .babelrc (Recommended)

.babelrc

// without options
{
  "plugins": ["transform-strict-mode"]
}

// with options
{
  "plugins": [
    ["transform-strict-mode", {
      "strict": true
    }]
  ]
}

Via CLI

$ babel --plugins transform-strict-mode script.js

Via Node API

require("babel-core").transform("code", {
  plugins: ["transform-strict-mode"]
});