Get QueryStrings from URL (default) or string

querystrings.js

function getQueryStrings(v) {
    const result = {};
    const rstripLeadingQuery = /^(:?\?|#)/;
    const queryString = (v ? String(v) : window.location.search).replace(
        rstripLeadingQuery,
        ''
    );
    const re = /([^&=]+)=([^&]*)/g;

    let m;

    // eslint-disable-next-line no-cond-assign
    while ((m = re.exec(queryString))) {
        result[decodeURIComponent(m[1])] = decodeURIComponent(m[2]);
    }

    return result;
}

// Usage:
// const queryStrings = getQueryStrings();
// const queryStrings = getQueryStrings('?Id=23829&lcid=1033&token=easterEgg');
// const queryStrings = getQueryStrings('Id=23829&lcid=1033&token=easterEgg'); // Missing the leading `?`
// const queryStrings = getQueryStrings('#here=nope'); // parses hashes