$ npm install --save symbol-keymirror
object: symbolKeyMirror([String]) Takes an array of string and returns an object with the string as key, and Symbol(key) as the value
const symbolKeyMirror = require('symbol-keymirror');
const keys = [
'ADD_ITEM',
'REMOVE_ITEM'
];
const symbols = symbolKeyMirror(keys);
symbols.ADD_ITEM; //Symbol('ADD_ITEM')