JSFiddle - React, Tailwind, and code Playground

by ZenMaster

HTML

<script src="//cdnjs.cloudflare.com/ajax/libs/knockout.mapping/2.4.1/knockout.mapping.js"></script>

JavaScript

var data = {
    a: {
        c: 10,
        d: 20
    },
    b: {
        c: 30,
        d: 40
    }
};

var viewModel = ko.mapping.fromJS(data, {
    ignore: ['c']
});

console.log(viewModel);
console.log(JSON.stringify(ko.mapping.toJS(viewModel), null, 4));