As a front developer, we should keep in mind what browsers are used by our customers. We say only modern browsers and IE 11 are supported, at least users won’t get an error on IE 11. Our config is : ['last 2 versions', 'ie >= 11'] and here’s detailed browsers: last 2 versions. If you find your config is different from this one, please ensure your config is a superset of the above list.
