还有什么人在尚未进阶到4096时依然沉迷于玩2048吗？

function KeyboardInputManager() { this.events = {}; if (window.navigator.msPointerEnabled) { //Internet Explorer 10 style this.eventTouchstart = "MSPointerDown"; this.eventTouchmove = "MSPointerMove"; this.eventTouchend = "MSPointerUp"; } else { this.eventTouchstart = "touchstart"; this.eventTouchmove = "touchmove"; this.eventTouchend = "touchend"; } this.listen(); } KeyboardInputManager.prototype.on = function (event, callback) { if (!this.events[event]) { this.events[event] = []; } this.events[event].push(callback); }; KeyboardInputManager.prototype.emit = function (event, data) { var callbacks = this.events[event]; if (callbacks) { callbacks.forEach(function (callback) { callback(data); }); } }; KeyboardInputManager.prototype.listen = function () { var self = this; var map = { 38: 0, // Up 39: 1, // Right 40: 2, // Down 37: 3, // Left 75: 0, // Vim up 76: 1, // Vim right 74: 2, // Vim down 72: 3, // Vim left 87: 0, // W 68: 1, // D 83: 2, // S 65: 3 // A }; // Respond to direction keys document.addEventListener("keydown", function (event) { var modifiers = event.altKey || event.ctrlKey || event.metaKey || event.shiftKey; var mapped = map[event.which]; // Ignore the event if it's happening in a text field if (self.targetIsInput(event)) return; if (!modifiers) { if (mapped !== undefined) { event.preventDefault(); self.emit("move", mapped); } } // R key restarts the game if (!modifiers && event.which === 82) { self.restart.call(self, event); } }); // Respond to button presses this.bindButtonPress(".retry-button", this.restart); this.bindButtonPress(".restart-button", this.restart); this.bindButtonPress(".keep-playing-button", this.keepPlaying); // Respond to swipe events var touchStartClientX, touchStartClientY; var gameContainer = document.getElementsByClassName("game-container")[0]; gameContainer.addEventListener(this.eventTouchstart, function (event) { if ((!window.navigator.msPointerEnabled && event.touches.length > 1) || event.targetTouches > 1 || self.targetIsInput(event)) { return; // Ignore if touching with more than 1 finger or touching input } if (window.navigator.msPointerEnabled) { touchStartClientX = event.pageX; touchStartClientY = event.pageY; } else { touchStartClientX = event.touches[0].clientX; touchStartClientY = event.touches[0].clientY; } event.preventDefault(); }); gameContainer.addEventListener(this.eventTouchmove, function (event) { event.preventDefault(); });