Function clmod

copyparty/web/util.js:523–552

(el, cls, add)

function clmod(el, cls, add) {
    if (!el)
        return false;

    if (el.classList) {
        var have = el.classList.contains(cls);
        if (add == 't')
            add = !have;

        if (!add == !have)
            return false;

        el.classList[add ? 'add' : 'remove'](cls);
        return true;
    }

    var re = new RegExp('\\s*\\b' + cls + '\\s*\\b', 'g'),
        n1 = el.className;

    if (add == 't')
        add = !re.test(n1);

    var n2 = n1.replace(re, ' ') + (add ? ' ' + cls : '');

    if (n1 == n2)
        return false;

    el.className = n2;
    return true;
}


function clgot(el, cls) {