ES6 array differenceBy

by Julien Roche

HTML

<pre></pre>

Babel + JSX

let a = new Set([{ 'x': 2 }, { 'x': 1 }]);
let b = new Set([{ 'x': 1 }]);
let differenceBy = [...a].filter(item => b.has(x));

document.querySelector('pre').innerHTML = JSON.stringify(differenceBy, null, 3);