Function to convert URL hash parameters into object (key value pairs)

You can use this function:

function parseParms(str) {
    var pieces = str.split("&"), data = {}, i, parts;
    // process each query pair
    for (i = 0; i < pieces.length; i++) {
        parts = pieces[i].split("=");
        if (parts.length < 2) {
            parts.push("");
        }
        data[decodeURIComponent(parts[0])] = decodeURIComponent(parts[1]);
    }
    return data;
}

This is taken from the .parseParms() method of a larger set of functionality on github I wrote for parsing a URL into all its pieces.

Input is a string in the form of:

"aaa=1&bbb=99&name=Bob"

and it will return an object like this:

{aaa: 1, bbb: 99, name: "Bob"}

So, if you have other things in the string besides just the parameters above, then you would need to remove those first before calling this function.

Working demo:

function parseParms(str) {
    var pieces = str.split("&"), data = {}, i, parts;
    // process each query pair
    for (i = 0; i < pieces.length; i++) {
        parts = pieces[i].split("=");
        if (parts.length < 2) {
            parts.push("");
        }
        data[decodeURIComponent(parts[0])] = decodeURIComponent(parts[1]);
    }
    return data;
}

console.log(parseParms("aaa=1&bbb=99&name=Bob"));

the foreEach method on arrays makes it even shorter:

const result = {};
hash.split('&').forEach(item => {
    result[item.split('=')[0]] = decodeURIComponent(item.split('=')[1]);
});