moo-repeat.js

/**
 * VueJS 2 version
 * Use v-moo-repeat="functionName" and on click this will be called repeatedly
 */

Vue.directive('moo-repeat', {
    /**
     * Bind - this adds a mouse down and mouse up to the element
     */
    moo : function() {

    },

    bind: function (el, binding, vnode) {
        const INITIAL_TIMEOUT = 500;
        var timeout = null,
            repeatTimeout = 0,
            repeatTimeoutSubtract = 0;
        /**
         * Callback function that gets faster and faster the longer it's held
         */
        var timeoutCallback = function() {
            if (timeout) clearTimeout(timeout);
            timeout = setTimeout(function() {
                if (el.disabled) return;
                doAction();
                if (repeatTimeout > 30) {
                    repeatTimeout -= repeatTimeoutSubtract;
                    repeatTimeoutSubtract = Math.round(repeatTimeoutSubtract / 1.5);
                    if (repeatTimeoutSubtract < 10) repeatTimeoutSubtract = 10;
                }
                timeoutCallback();
            }, repeatTimeout);
        };

        var stop = function(e) {
            clearTimeout(timeout);
            e.preventDefault();
        };

        var doAction = function() {
            binding.value();
        };

        var start = function(e) {
            // initial click
            doAction();

            // clear anything that might exist
            repeatTimeout = INITIAL_TIMEOUT;
            repeatTimeoutSubtract = 100;
            timeoutCallback();

            // don't do standard behaviour
            e.preventDefault();
        };

        el.addEventListener('mousedown', function(e) {start(e);}, false);
        el.addEventListener('mouseout', function(e) {stop(e);}, false);
        el.addEventListener('touchstart', function(e) {start(e);}, false);
        el.addEventListener('mouseup', function(e) {stop(e);}, false);
        el.addEventListener('touchend', function(e) {stop(e);}, false);

    },

    /**
     * Unbind the events as required
     */
    unbind: function (el, binding, vnode) {
        el.removeEventListener('mousedown', ?, false);
        el.removeEventListener('mouseout', ?, false);
        el.removeEventListener('touchstart', ?, false);
        el.removeEventListener('mouseup', ?, false);
        el.removeEventListener('touchend', ?, false);
    }
});

Ta