移动端插件-zepto.js简单了解

zepto.js简介

zepto.js的api和jquery.js差不多。

• jquery.js 针对pc端
• zepto.js 针对移动端

1.事件不同 2.体积大小

注意: 在移动端页面中使用click事件会有300毫秒的延迟。所以使用touch.js

//     Zepto.js
//     (c) 2010-2016 Thomas Fuchs
//     Zepto.js may be freely distributed under the MIT license.
//  touch.js
//     Zepto.js
//     (c) 2010-2016 Thomas Fuchs
//     Zepto.js may be freely distributed under the MIT license.

;(function($){
  var touch = {},
    touchTimeout, tapTimeout, swipeTimeout, longTapTimeout,
    longTapDelay = 750,
    gesture,
    down, up, move,
    eventMap,
    initialized = false

  function swipeDirection(x1, x2, y1, y2) {
    return Math.abs(x1 - x2) >=
      Math.abs(y1 - y2) ? (x1 - x2 > 0 ? 'Left' : 'Right') : (y1 - y2 > 0 ? 'Up' : 'Down')
  }

  function longTap() {
    longTapTimeout = null
    if (touch.last) {
      touch.el.trigger('longTap')
      touch = {}
    }
  }

  function cancelLongTap() {
    if (longTapTimeout) clearTimeout(longTapTimeout)
    longTapTimeout = null
  }

  function cancelAll() {
    if (touchTimeout) clearTimeout(touchTimeout)
    if (tapTimeout) clearTimeout(tapTimeout)
    if (swipeTimeout) clearTimeout(swipeTimeout)
    if (longTapTimeout) clearTimeout(longTapTimeout)
    touchTimeout = tapTimeout = swipeTimeout = longTapTimeout = null
    touch = {}
  }

  function isPrimaryTouch(event){
    return (event.pointerType == 'touch' ||
      event.pointerType == event.MSPOINTER_TYPE_TOUCH)
      && event.isPrimary
  }

  function isPointerEventType(e, type){
    return (e.type == 'pointer'+type ||
      e.type.toLowerCase() == 'mspointer'+type)
  }

  // helper function for tests, so they check for different APIs
  function unregisterTouchEvents(){
    if (!initialized) return
    $(document).off(eventMap.down, down)
      .off(eventMap.up, up)
      .off(eventMap.move, move)
      .off(eventMap.cancel, cancelAll)
    $(window).off('scroll', cancelAll)
    cancelAll()
    initialized = false
  }

  function setup(__eventMap){
    var now, delta, deltaX = 0, deltaY = 0, firstTouch, _isPointerType

    unregisterTouchEvents()

    eventMap = (__eventMap && ('down' in __eventMap)) ? __eventMap :
      ('ontouchstart' in document ?
      { 'down': 'touchstart', 'up': 'touchend',
        'move': 'touchmove', 'cancel': 'touchcancel' } :
      'onpointerdown' in document ?
      { 'down': 'pointerdown', 'up': 'pointerup',
        'move': 'pointermove', 'cancel': 'pointercancel' } :
       'onmspointerdown' in document ?
      { 'down': 'MSPointerDown', 'up': 'MSPointerUp',
        'move': 'MSPointerMove', 'cancel': 'MSPointerCancel' } : false)

    // No API availables for touch events
    if (!eventMap) return

    if ('MSGesture' in window) {
      gesture = new MSGesture()
      gesture.target = document.body

      $(document)
        .bind('MSGestureEnd', function(e){
          var swipeDirectionFromVelocity =
            e.velocityX > 1 ? 'Right' : e.velocityX < -1 ? 'Left' : e.velocityY > 1 ? 'Down' : e.velocityY < -1 ? 'Up' : null
          if (swipeDirectionFromVelocity) {
            touch.el.trigger('swipe')
            touch.el.trigger('swipe'+ swipeDirectionFromVelocity)
          }
        })
    }

    down = function(e){
      if((_isPointerType = isPointerEventType(e, 'down')) &&
        !isPrimaryTouch(e)) return
      firstTouch = _isPointerType ? e : e.touches[0]
      if (e.touches && e.touches.length === 1 && touch.x2) {
        // Clear out touch movement data if we have it sticking around
        // This can occur if touchcancel doesn't fire due to preventDefault, etc.
        touch.x2 = undefined
        touch.y2 = undefined
      }
      now = Date.now()
      delta = now - (touch.last || now)
      touch.el = $('tagName' in firstTouch.target ?
        firstTouch.target : firstTouch.target.parentNode)
      touchTimeout && clearTimeout(touchTimeout)
      touch.x1 = firstTouch.pageX
      touch.y1 = firstTouch.pageY
      if (delta > 0 && delta <= 250) touch.isDoubleTap = true
      touch.last = now
      longTapTimeout = setTimeout(longTap, longTapDelay)
      // adds the current touch contact for IE gesture recognition
      if (gesture && _isPointerType) gesture.addPointer(e.pointerId)
    }

    move = function(e){
      if((_isPointerType = isPointerEventType(e, 'move')) &&
        !isPrimaryTouch(e)) return
      firstTouch = _isPointerType ? e : e.touches[0]
      cancelLongTap()
      touch.x2 = firstTouch.pageX
      touch.y2 = firstTouch.pageY

      deltaX += Math.abs(touch.x1 - touch.x2)
      deltaY += Math.abs(touch.y1 - touch.y2)
    }

    up = function(e){
      if((_isPointerType = isPointerEventType(e, 'up')) &&
        !isPrimaryTouch(e)) return
      cancelLongTap()

      // swipe
      if ((touch.x2 && Math.abs(touch.x1 - touch.x2) > 30) ||
          (touch.y2 && Math.abs(touch.y1 - touch.y2) > 30))

        swipeTimeout = setTimeout(function() {
          if (touch.el){
            touch.el.trigger('swipe')
            touch.el.trigger('swipe' + (swipeDirection(touch.x1, touch.x2, touch.y1, touch.y2)))
          }
          touch = {}
        }, 0)

      // normal tap
      else if ('last' in touch)
        // don't fire tap when delta position changed by more than 30 pixels,
        // for instance when moving to a point and back to origin
        if (deltaX < 30 && deltaY < 30) {
          // delay by one tick so we can cancel the 'tap' event if 'scroll' fires
          // ('tap' fires before 'scroll')
          tapTimeout = setTimeout(function() {

            // trigger universal 'tap' with the option to cancelTouch()
            // (cancelTouch cancels processing of single vs double taps for faster 'tap' response)
            var event = $.Event('tap')
            event.cancelTouch = cancelAll
            // [by paper] fix -> "TypeError: 'undefined' is not an object (evaluating 'touch.el.trigger'), when double tap
            if (touch.el) touch.el.trigger(event)

            // trigger double tap immediately
            if (touch.isDoubleTap) {
              if (touch.el) touch.el.trigger('doubleTap')
              touch = {}
            }

            // trigger single tap after 250ms of inactivity
            else {
              touchTimeout = setTimeout(function(){
                touchTimeout = null
                if (touch.el) touch.el.trigger('singleTap')
                touch = {}
              }, 250)
            }
          }, 0)
        } else {
          touch = {}
        }
        deltaX = deltaY = 0
    }

    $(document).on(eventMap.up, up)
      .on(eventMap.down, down)
      .on(eventMap.move, move)

    // when the browser window loses focus,
    // for example when a modal dialog is shown,
    // cancel all ongoing events
    $(document).on(eventMap.cancel, cancelAll)

    // scrolling the window indicates intention of the user
    // to scroll, not tap or swipe, so cancel all ongoing events
    $(window).on('scroll', cancelAll)

    initialized = true
  }

  ;['swipe', 'swipeLeft', 'swipeRight', 'swipeUp', 'swipeDown',
    'doubleTap', 'tap', 'singleTap', 'longTap'].forEach(function(eventName){
    $.fn[eventName] = function(callback){ return this.on(eventName, callback) }
  })

  $.touch = { setup: setup }

  $(document).ready(setup)
})(Zepto)

### touch.js

• click====>tap 触摸事件
• swipeLeft 向左滑动
• swipeRight 向右滑动
• swipeUp 向上滑动
• swipeDown 向下滑动

zepto.js案例

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <style>
    *{
      margin: 0;
      padding:0;
    }
    .container{
      width:100vw;
      height:100vh;
      overflow: hidden;
    }
    ul{
      transition:  all 1s;
    }
    ul li{
      float: left;
      overflow:hidden;
       width:100vw;
       height:100vh;
    }
    ul li img{
      width:100vw;
      height:100vh;
      
    }
  </style>
  <script src="./zepto.min.js"></script>
  <!-- 触摸事件模块 -->
   <script src="./touch.js"></script>
   <!-- 动画模块 -->
   <script src="./fx.js"></script>
  
  <script>
    $(function(){
      var width=$('li').first().width();
      var liLen=$('li').length;
      $('ul').width(width*liLen);
      var index=0;
      // 往左滑
      $('ul').on('swipeLeft',function(){
        // console.log(11)
        index++;
        if(index>=liLen){
          index=0;
        }
        $(this).animate({
          transform:'translateX(-'+index*width+'px)'
        })
      })
      // 往右滑动
      $('ul').on('swipeRight',function(){
      // console.log(11)
      index--;
      if(index<0){
      index=liLen-1;
      }
      $(this).animate({
      transform:'translateX(-'+index*width+'px)'
      })
      })
    })
  </script>
</head>
<body>
  <div class="container">
    <ul>
      <li><img src="./img/1.jpg" alt=""></li>
      <li><img src="./img/2.jpg" alt=""></li>
      <li><img src="./img/3.jpg" alt=""></li>
    </ul>
  </div>
  
</body>
</html>

//     Zepto.js
//     (c) 2010-2016 Thomas Fuchs
//     Zepto.js may be freely distributed under the MIT license.
//动画模块fx.js
;
(function ($, undefined) {
  var prefix = '',
    eventPrefix,
    vendors = {
      Webkit: 'webkit',
      Moz: '',
      O: 'o'
    },
    testEl = document.createElement('div'),
    supportedTransforms = /^((translate|rotate|scale)(X|Y|Z|3d)?|matrix(3d)?|perspective|skew(X|Y)?)$/i,
    transform,
    transitionProperty, transitionDuration, transitionTiming, transitionDelay,
    animationName, animationDuration, animationTiming, animationDelay,
    cssReset = {}

  function dasherize(str) {
    return str.replace(/([A-Z])/g, '-$1').toLowerCase()
  }

  function normalizeEvent(name) {
    return eventPrefix ? eventPrefix + name : name.toLowerCase()
  }

  if (testEl.style.transform === undefined) $.each(vendors, function (vendor, event) {
    if (testEl.style[vendor + 'TransitionProperty'] !== undefined) {
      prefix = '-' + vendor.toLowerCase() + '-'
      eventPrefix = event
      return false
    }
  })

  transform = prefix + 'transform'
  cssReset[transitionProperty = prefix + 'transition-property'] =
    cssReset[transitionDuration = prefix + 'transition-duration'] =
    cssReset[transitionDelay = prefix + 'transition-delay'] =
    cssReset[transitionTiming = prefix + 'transition-timing-function'] =
    cssReset[animationName = prefix + 'animation-name'] =
    cssReset[animationDuration = prefix + 'animation-duration'] =
    cssReset[animationDelay = prefix + 'animation-delay'] =
    cssReset[animationTiming = prefix + 'animation-timing-function'] = ''

  $.fx = {
    off: (eventPrefix === undefined && testEl.style.transitionProperty === undefined),
    speeds: {
      _default: 400,
      fast: 200,
      slow: 600
    },
    cssPrefix: prefix,
    transitionEnd: normalizeEvent('TransitionEnd'),
    animationEnd: normalizeEvent('AnimationEnd')
  }

  $.fn.animate = function (properties, duration, ease, callback, delay) {
    if ($.isFunction(duration))
      callback = duration, ease = undefined, duration = undefined
    if ($.isFunction(ease))
      callback = ease, ease = undefined
    if ($.isPlainObject(duration))
      ease = duration.easing, callback = duration.complete, delay = duration.delay, duration = duration.duration
    if (duration) duration = (typeof duration == 'number' ? duration :
      ($.fx.speeds[duration] || $.fx.speeds._default)) / 1000
    if (delay) delay = parseFloat(delay) / 1000
    return this.anim(properties, duration, ease, callback, delay)
  }

  $.fn.anim = function (properties, duration, ease, callback, delay) {
    var key, cssValues = {},
      cssProperties, transforms = '',
      that = this,
      wrappedCallback, endEvent = $.fx.transitionEnd,
      fired = false

    if (duration === undefined) duration = $.fx.speeds._default / 1000
    if (delay === undefined) delay = 0
    if ($.fx.off) duration = 0

    if (typeof properties == 'string') {
      // keyframe animation
      cssValues[animationName] = properties
      cssValues[animationDuration] = duration + 's'
      cssValues[animationDelay] = delay + 's'
      cssValues[animationTiming] = (ease || 'linear')
      endEvent = $.fx.animationEnd
    } else {
      cssProperties = []
      // CSS transitions
      for (key in properties)
        if (supportedTransforms.test(key)) transforms += key + '(' + properties[key] + ') '
      else cssValues[key] = properties[key], cssProperties.push(dasherize(key))

      if (transforms) cssValues[transform] = transforms, cssProperties.push(transform)
      if (duration > 0 && typeof properties === 'object') {
        cssValues[transitionProperty] = cssProperties.join(', ')
        cssValues[transitionDuration] = duration + 's'
        cssValues[transitionDelay] = delay + 's'
        cssValues[transitionTiming] = (ease || 'linear')
      }
    }

    wrappedCallback = function (event) {
      if (typeof event !== 'undefined') {
        if (event.target !== event.currentTarget) return // makes sure the event didn't bubble from "below"
        $(event.target).unbind(endEvent, wrappedCallback)
      } else
        $(this).unbind(endEvent, wrappedCallback) // triggered by setTimeout

      fired = true
      $(this).css(cssReset)
      callback && callback.call(this)
    }
    if (duration > 0) {
      this.bind(endEvent, wrappedCallback)
      // transitionEnd is not always firing on older Android phones
      // so make sure it gets fired
      setTimeout(function () {
        if (fired) return
        wrappedCallback.call(that)
      }, ((duration + delay) * 1000) + 25)
    }

    // trigger page reflow so new elements can animate
    this.size() && this.get(0).clientLeft

    this.css(cssValues)

    if (duration <= 0) setTimeout(function () {
      that.each(function () {
        wrappedCallback.call(this)
      })
    }, 0)

    return this
  }

  testEl = null
})(Zepto)