'use strict'; // async/await support came with the below specified versions for Chrome, // Firefox and Edge. Async/await is is the newest ES6 feature we are not // transpiling. Safari's template literal support is a little problematic during // v12 in that it has a GC bug for tagged template literals. We don't currently // rely on this functionality so the bug wouldn't effect us, but in order to use // browser versions as a measure for ES6 features we need to specify Safari 13 // for native, non-transpiled template literals. In reality template literals // came in Safari 9.1. Safari's async/await support came in Safari 10, so thats // the earliest Safari we cover in reality here. module.exports = { browsers: ['Chrome 55', 'Firefox 53', 'Safari 13', 'Edge 15'], };