directory adjust: delete entry index.js

packages/swipe/utils.js

@@ -0,0 +1,77 @@
+import Vue from 'vue';
+
+var extend = Object.assign.bind(Object);
+
+function EventEmitter() {
+  this.__events = {};
+}
+EventEmitter.prototype = {
+  on: function(name, cb) {
+    this.__events[name] || (this.__events[name] = []);
+    this.__events[name].push(cb);
+    return this;
+  },
+  emit: function(name) {
+    var arr = this.__events[name];
+    var argus = Array.prototype.slice.call(arguments, 1);
+    var self = this;
+    if (arr) {
+      arr.forEach(function(cb) {
+        cb.apply(self, argus);
+      });
+    }
+  },
+  removeListener: function(name, fn) {
+    if (!this.__events[name]) {
+      return;
+    }
+    let index;
+    if (fn) {
+      index = this.__events[name].indexOf(fn);
+      if (index > 0) {
+        this.__events[name].splice(index, 1);
+      }
+    } else {
+      delete this.__events[name];
+    }
+  }
+};
+
+const isSupportRequestAnimationFrame = !Vue.prototype.$isServer &&
+  (window.requestAnimationFrame ||
+  window.mozRequestAnimationFrame ||
+  window.webkitRequestAnimationFrame ||
+  window.msRequestAnimationFrame);
+const isSupportCancelAnimationFrame = !Vue.prototype.$isServer &&
+  (window.cancelAnimationFrame ||
+  window.mozCancelAnimationFrame ||
+  window.webkitCancelAnimationFrame ||
+  window.msCancelAnimationFrame);
+
+const requestAnimationFrame = isSupportRequestAnimationFrame || function(callback, element) {
+  return window.setTimeout(callback, 1000 / 60);
+};
+
+const cancelAnimationFrame = isSupportCancelAnimationFrame || function(id) {
+  clearTimeout(id);
+};
+
+const bindEvents = (elem, eventNames, fn) => {
+  eventNames = eventNames.split(/\s+/);
+  eventNames.forEach(eventName => elem.addEventListener(eventName, fn));
+};
+
+const removeEvents = (elem, eventNames, fn) => {
+  eventNames = eventNames.split(/\s+/);
+  eventNames.forEach(eventName => elem.removeEventListener(eventName, fn));
+};
+
+export {
+  extend,
+  EventEmitter,
+  requestAnimationFrame,
+  cancelAnimationFrame,
+  bindEvents,
+  removeEvents
+};
+