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Hey man, how are you?

You may try to call Date.now() on every tick within while loop and check against your target value like so:

var td = {
    "setTimeout": function (callback, ms) {
        var dt = new Date();
        var i = dt.getTime();
        var future = i + ms;
        while(Date.now() <= future) {
            //do nothing - blocking
        }
        return callback();
    }
};