Formally introduced in ES6,
Unfortunately, support cannot be retrofitted to older browsers with a polyfill, supported by IE11+, Edge 12+, Firefox 36+, Chrome 21+, Safari 5.1+. If you still need to support older browsers or devices you may want to stick with
NOTE: some initial implementations may have thrown different exceptions on reassignment, were not limited in scope, or treated
const like ‘
Name may start with letter, underscore or $ character.