is-es5

Check code is at most ES5 syntax

Installation

This is a Node.js module available through the npm registry. It can be installed using the npm or yarn command line tools.

npm install is-es5 --save

Usage

var isES5 = require('is-es5')
 
var es5code = 'var x = 1'
var es6code = 'const y = 2'
 
isES5(es5code) // => true
isES5(es6code) // => false

Tests

npm install
npm test

Dependencies

• acorn: ECMAScript parser

Dev Dependencies

• proclaim: A simple assertion library for server and client side JavaScript

License

MIT