Lodash method for reversing key: values in object
invert works fine for flat objects, if you want it to be nested, you need something like this:
var deepInvert = function(obj) { return _.transform(obj, function(res, val, key) { if(_.isPlainObject(val)) { res[key] = deepInvert(val); } else { res[val] = key; } });};//var a = { x: 1, y: 2, nested: { a: 8, b: 9 }};var b = deepInvert(a);document.write('<pre>'+JSON.stringify(b,0,3));<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.2.0/lodash.min.js"></script>