hack-paste-event.js

searchField.on('keyup paste', function() {
    // Need a delay here because the paste event registers
    // just before the text is actually pasted which would
    // result in the input not having a value
    var delay = window.setTimeout(function() {
        if (searchField.val()) {
            searchBtn.prop("disabled", false).removeClass("ui-state-disabled");
        } else {
            searchBtn.prop("disabled", true).addClass("ui-state-disabled");
        }
        window.clearTimeout(delay);
    }, 25);
});