How to perform math on JSON stringify paramaters

Question

This is the outputted JSON data, I need to take values a and add it to b.

{
    protocol: null,
    slashes: null,
    auth: null,
    host: null,
    port: null,
    hostnat null,
    hash: null,
    search: "?t4&bt
    query: {
        a: "t,
        b: t2"
    },
    pathname: "/",
    path: "/?t=4tb=2",
    href: "/?t=4tb=2"
}

Thanks in advance! I know it's probably simple but I'm new to this.

Answer 1

Use JSON.parse. Note that all key names need to be quoted, and single quotes, ', are used on the outside so as not to interfere with the quotes inside the JSON string.

Also, remove the quotes from the numbers if you want them to be treated as numbers.

var urlParams = JSON.parse('{"protocol": null,"slashes": null,"auth": null,"host": null,"port": null,"hostname": null,"hash": null,"search": "?a=4&b=2","query": {"a": 4,"b": 2},"pathname": "/","path": "/?a=4&b=2","href": "/?a=4&b=2"}');

var sum = urlParams.query.a + urlParams.query.b;