ES2015 Destructuring Assignment Example -- Basic array destructuring assignment with default value

arrays-defaults-basic.js

/* ES5 equivalent (ignoring assignment of intended falsy values)
   var arr = [];
   var one = arr[0] || 1;
   var two = arr[1];
 */
let arr = [];
let [one = 1, two] = arr;
console.log({one, two}); // output: { one: 1, two: undefined }