Of Stack

Wap image scrolling effects without css3 elements pure js script

  • 2020-03-30 03:43:54
  • OfStack

Problem 1: when you add a link to an image, it always jumps to another page when you drag it

The root cause of the problem is that you can't decide whether to click or drag. The normal order of mobile phone events is touchstart- mousedown- mousemove- mousemove- mouseup- touchend- click, which may be different depending on the phone. Touch screen mobile phone events generally use touchstart, touchmove - "touchend -" click, click event is the last, when we have touchstart, touchmove, touchend after the treatment, if not for the return or cancel the default will trigger the click event, this page jump away, solution is to record the coordinates of points and touchmove touchstart the coordinates of the point, according to two coordinates counted out contact ever move, Notable among them is the Event parameter of the Event, touch screen is generally event.touches, event.targettouches, event.changedtouches. I discoverer in test of three parameters the value of the same, but it is worth noting that the touchend events will not be contact coordinates (also may be equipment problem), when the mobile touchmove constantly, sometimes touchmove will not trigger, which is bringing the function to contact (or mouse) from the selected elements, such as time to hold down the menu, there will be (PC images will generate a thumbnail can drag). Event.preventdefault () before touchstart (mousedown); Cancel the default.

Problem 2: the scroll bar on the page cannot scroll while dragging pictures

Believe that have a will meet the problem as long as the production, mainly in mobile (touchmove, mousemove) cancel the default event event. The preventDefault (), we need to do is here, whether mobile for contact and start contacts are consistent, if agreement is returned directly, also calculate is moving the x axis more or y axis move more, so that we can do about sliding cancel the default, when not in school canceled;

Problem 3: and not compatible with dragging on PC machines

This is because when binding an event, you cannot fully consider whether the event name is' touchstart 'or' mousedown 


this.eventName={
touchstart:'touchstart',
touchmove:'touchmove',
touchend:'touchend',
}
 In the judgment 
if(!device){
this.eventName.touchstart='mousedown';
this.eventName.touchmove='mousemove';
this.eventName.touchend='mouseup';
}
dom.addEventListener(this.eventName.touchstart,handleEvent,false);

This is roughly what it means, binding different events to different devices

In fact, there are still a lot of problems, not clear

Don't say more, directly put the code posted, if there is something not too good, also please include and put forward comments 


<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" name="viewport" />
<meta content="yes" name="apple-mobile-web-app-capable" />
<meta content="black" name="apple-mobile-web-app-status-bar-style" />
<meta content="telephone=no" name="format-detection" />
<title></title>
<style type="text/css">

html,body,*{ margin: 0; padding: 0; border: 0;}
#wapListImage1, #wapListImage{width: 100%; overflow: hidden; height: auto; cursor: move; zoom:1; position: relative;}
#wapListImage1 ul,
#wapListImage1 ul li,
#wapListImage1 ul,
#wapListImage ul li{ list-style: none;}
#wapListImage1 ul, #wapListImage ul{width: 99999px;}
#wapListImage1 ul li, #wapListImage ul li{ float: left;}
#wapListImage ul li a img:focus,
#wapListImage ul li a img:checked,
#wapListImage ul li a img,
#wapListImage ul li a img:active,
#wapListImage ul li a,#wapListImage ul li a:active{cursor: move;}
#wapListImage dl{ position: absolute; bottom: 10px; right: 0;}
#wapListImage dl span{overflow: hidden;width: 10px; height: 10px; background-color: #900; display: inline-block;}
#wapListImage dl span.selected{ background-color: #000;}
</style>
</head>
<body>
<div id="k">
<div id="wapListImage">
<ul>
<li><a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" hrefto="ddd" target="_black"><img src="http://file25.mafengwo.net/M00/37/74/wKgB4lM9Hb-ARjpJAAOsX46Kq9w39.gonglve.w690.jpeg"></a></li>
<li><a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" hrefto="ddd"><img src="http://file25.mafengwo.net/M00/F2/06/wKgB4lNaHHCASXmDAAFtZsUxuwQ66.gonglve.w690.jpeg"></a></li>
<li><a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" hrefto="ddd"><img src="http://file25.mafengwo.net/M00/2B/EE/wKgB4lNwdpeAbvZiAAWcFRXe2Po83.gonglve.w690.jpeg"></a></li>
<!-- <li><a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" hrefto="ddd" target="_black"><img src="http://file25.mafengwo.net/M00/37/74/wKgB4lM9Hb-ARjpJAAOsX46Kq9w39.gonglve.w690.jpeg"></a></li>
<li><a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" hrefto="ddd"><img src="http://file25.mafengwo.net/M00/F2/06/wKgB4lNaHHCASXmDAAFtZsUxuwQ66.gonglve.w690.jpeg"></a></li>
<li><a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" hrefto="ddd"><img src="http://file25.mafengwo.net/M00/2B/EE/wKgB4lNwdpeAbvZiAAWcFRXe2Po83.gonglve.w690.jpeg"></a></li> -->
</ul>
<dl>
<span class="selected">1</span>
<span>2</span>
<span>3</span>
<!-- <span>4</span>
<span>5</span>
<span>6</span> -->

</dl>
</div>
</div>
<div style="height:200px;"></div>
<div id="wapListImage1">
<ul>
<li><a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" hrefto="ddd" target="_black"><img src="http://file25.mafengwo.net/M00/37/74/wKgB4lM9Hb-ARjpJAAOsX46Kq9w39.gonglve.w690.jpeg"></a></li>
<li><a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" hrefto="ddd"><img src="http://file25.mafengwo.net/M00/F2/06/wKgB4lNaHHCASXmDAAFtZsUxuwQ66.gonglve.w690.jpeg"></a></li>
<li><a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" hrefto="ddd"><img src="http://file25.mafengwo.net/M00/2B/EE/wKgB4lNwdpeAbvZiAAWcFRXe2Po83.gonglve.w690.jpeg"></a></li>
</ul>
</div>
<script type="text/javascript">
;(function(w,d){
var device = (/android|webos|iphone|ipad|ipod|blackberry|iemobile|opera mini/i.test(navigator.userAgent.toLowerCase()));
function WapImage(){
this.options={
dom: null,
speed:200,
isupdate:true,
time:3000,
leftOrright:'left',
isfor:false,
callBack:function(){}
},
this.eventName={
touchstart:'touchstart',
touchmove:'touchmove',
touchend:'touchend',
},
this.point={
x:5,
y:5,
pageX1:0,
pageX2:0,
pageY1:0,
pageY2:0
},
this.page={
bodyWidth:320,
domUL:null,
liList:null,
index: 0,
flag:false,
sTime:0,
eTime:0,
isDown:false,
mleft:0,
back:30,
moveId:[],
nextId:null,
prevId:null,
isdom:false
},
this.Event={
handleEvent: function(event,lib){
event = event ? event : window.event;
// console.log(event.type)
switch(event.type){

case "touchstart":
var touch = event.touches[0];
case "mousedown":
if(lib.page.isDown) return;
lib.page.isDown=true;
lib.page.sTime=lib.page.eTime=new Date().getTime();
lib.Event.stop(lib,lib);
if(event.type=="mousedown"){
touch = event;
event.preventDefault();
}
lib.point.pageX1 = lib.point.pageX2 = touch.pageX;
lib.point.pageY1 = lib.point.pageY2 = touch.pageY;
lib.page.mleft = parseFloat(lib.page.domUL.style.marginLeft);
lib.page.mleft = lib.page.mleft ? lib.page.mleft : 0;
break;
case "touchmove":
var touch = event.touches[0];
case "mousemove":
if(!lib.page.isDown) return;

if(event.type=="mousemove"){
touch = event;
}
lib.point.pageX2 = touch.pageX;
lib.point.pageY2 = touch.pageY;


if(lib.point.pageX1==lib.point.pageX2){
event.preventDefault(); 
return false;
}
var changeX = lib.point.pageX1 - lib.point.pageX2;
var changeY = lib.point.pageY1 - lib.point.pageY2;
if(Math.abs(changeX)>Math.abs(changeY)) {//About the event
event.preventDefault(); 
lib.page.domUL.style.marginLeft=lib.page.mleft-changeX+'px';
if(parseFloat(lib.page.domUL.style.marginLeft)<= -(lib.page.liList.length-1)*lib.page.bodyWidth){
lib.page.domUL.style.marginLeft= -(lib.page.liList.length-1)*lib.page.bodyWidth+'px';
lib.page.mleft=-(lib.page.liList.length-1)*lib.page.bodyWidth;
}
if(parseFloat(lib.page.domUL.style.marginLeft)>0){
lib.page.domUL.style.marginLeft='0px';
lib.page.mleft=0;
}


}else if(Math.abs(changeY)>Math.abs(changeX)){//Up and down events

}else{//Long press or click

}
break;
case "mouseup":
case "touchend":
if(!lib.page.isDown) return;
lib.page.eTime=new Date().getTime();
lib.page.mleft = parseFloat(lib.page.domUL.style.marginLeft);
lib.page.mleft = lib.page.mleft ? lib.page.mleft : 0;

var changeX = lib.point.pageX1 - lib.point.pageX2;
var changeY = lib.point.pageY1 - lib.point.pageY2;
if(Math.abs(changeX)>Math.abs(changeY)) {//About the event

event.preventDefault();
lib.Event.move.call(this,lib);

}else if(Math.abs(changeY)>Math.abs(changeX)){//Up and down events
lib.Event.move.call(this,lib);
}else{//Long press or click
if((lib.page.eTime - lib.page.sTime) > 300) {// Long press 
}else{// Click on the 
if(event.button==0 || event.type=='touchend'){
var a = lib.page.liList[lib.page.index].getElementsByTagName('a')[0];
if(typeof a.getAttribute('target')=='object'){
w.location=a.getAttribute('hrefto')
}else{
w.open(a.getAttribute('hrefto'));
}
}

}
}
lib.page.isDown=false;
break;
default:
break;
}
},
position: function(lib,index){
// if(index==undefined){
// lib.page.domUL.style.marginLeft= -(lib.page.index*lib.page.bodyWidth) +'px';
// }else{
// lib.page.domUL.style.marginLeft= -(index*lib.page.bodyWidth) +'px';
// lib.page.index=index;
// }



if(!lib.options.isfor){
if(index==undefined){
lib.page.domUL.style.marginLeft= -(lib.page.index*lib.page.bodyWidth) +'px';
}else{
lib.page.domUL.style.marginLeft= -((index-1)*lib.page.bodyWidth) +'px';
lib.page.index=index-1;
}
lib.options.callBack({"index":parseInt(lib.page.liList[lib.page.index].getAttribute('index'))+1});
}else{
if(index==undefined){
lib.page.domUL.style.marginLeft= -lib.page.bodyWidth +'px';
}else{
lib.page.domUL.style.marginLeft= -lib.page.bodyWidth +'px';
while(true){
if(parseInt(index)==parseInt(lib.page.liList[1].getAttribute('index'))+1){
break;
}
lib.page.domUL.insertBefore(lib.page.liList[lib.page.liList.length-1],lib.page.liList[0]);
}
}
lib.options.callBack({"index":parseInt(lib.page.liList[1].getAttribute('index'))+1});
}
},
stop:function(lib){
for(var i =0;i<lib.page.moveId.length;i++){
clearInterval(lib.page.moveId[i]);
}
lib.page.moveId=[];
},
start:function(lib){
if(lib.options.isupdate){
lib.page.moveId[lib.page.moveId.length] = setInterval(function(){
if(lib.options.leftOrright=='left'){
lib.Event.next(lib,lib);
}else{
lib.Event.prev(lib,lib);
}
},lib.options.time);
}
},
next:function(lib){
// console.log(lib.page.prevId.length+"nextId")
// for (var n=0;n<lib.page.prevId.length;n++) {
// // clearInterval(lib.page.prevId[n]);
// };
// lib.page.prevId=[];
clearInterval(lib.page.prevId);
lib.page.prevId=null;
// var left = (lib.page.bodyWidth-Math.abs(lib.point.pageX1-lib.point.pageX2))/lib.options.speed;
var yu = Math.abs(parseInt(lib.page.domUL.style.marginLeft));
while(true){
if(yu==0){
yu=lib.page.bodyWidth;
break;
}else if(yu<0){
yu= Math.abs(yu);
break;
}
yu=yu-lib.page.bodyWidth
}
// var left = (lib.page.bodyWidth-Math.abs(parseFloat(lib.page.domUL.style.marginLeft)%lib.page.bodyWidth))/lib.options.speed;
var left = yu/lib.options.speed;
var c = 0;
if(lib.page.index==lib.page.liList.length-1){
lib.page.flag=false;
return;
}
clearInterval(lib.page.nextId);
lib.page.nextId = window.setInterval(function(){
// lib.Event.stop(lib,lib);
// if(lib.page.moveId==null){
// clearInterval(id);
// }
c=c+5;
lib.page.domUL.style.marginLeft= (parseFloat(lib.page.domUL.style.marginLeft)-left*5)+'px';
// console.log("next"+lib.page.domUL.style.marginLeft);
if(c>=lib.options.speed || parseFloat(lib.page.domUL.style.marginLeft)<= -(lib.page.liList.length-1)*lib.page.bodyWidth ){
if(parseFloat(lib.page.domUL.style.marginLeft)<= -(lib.page.liList.length-1)*lib.page.bodyWidth){
lib.page.domUL.style.marginLeft= -(lib.page.liList.length-1)*lib.page.bodyWidth+'px';
}
clearInterval(lib.page.nextId);
// for(var n=0;n=lib.page.nextId.length;n++){
// clearInterval(lib.page.nextId[0]);
// }
// lib.page.nextId=[];
lib.page.index++;
lib.page.flag=false;
lib.Event.domUpdate.call(this,lib,'r');
if(lib.page.moveId.length==0){
lib.Event.start(lib,lib);
}

}
},5);
},
prev:function(lib){
// console.log(lib.page.nextId.length+"nextId")
// for(var n=0;n=lib.page.nextId.length;n++){
// // clearInterval(lib.page.nextId[0]);
// }
clearInterval(lib.page.nextId);
lib.page.nextId=null;
// lib.page.nextId=[];
// var left = (lib.page.bodyWidth-Math.abs(lib.point.pageX1-lib.point.pageX2))/lib.options.speed;
// var left = (lib.page.bodyWidth-Math.abs(parseFloat(lib.page.domUL.style.marginLeft)%lib.page.bodyWidth))/lib.options.speed;
var yu = Math.abs(parseInt(lib.page.domUL.style.marginLeft));
// console.log(yu+"----"+lib.page.domUL.style.marginLeft)
while(true){
if(yu==0){
yu=lib.page.bodyWidth;
break;
}else if(yu<0){
yu= lib.page.bodyWidth-Math.abs(yu);
break;
}
yu=yu-lib.page.bodyWidth
}
// var left = (lib.page.bodyWidth-yu)/lib.options.speed;
var left = yu/lib.options.speed;
var c = 0,id;
if(lib.page.index==0){
lib.page.flag=false;
return;
} 
var ml = parseFloat(lib.page.domUL.style.marginLeft);
clearInterval(lib.page.prevId);
lib.page.prevId = window.setInterval(function(){
c=c+5;
lib.page.domUL.style.marginLeft= (parseFloat(lib.page.domUL.style.marginLeft)+left*5)+'px';
// console.log(lib.page.domUL.style.marginLeft);
if(c>=lib.options.speed || parseFloat(lib.page.domUL.style.marginLeft)>=0){
if(parseFloat(lib.page.domUL.style.marginLeft)>=0){
lib.page.domUL.style.marginLeft='0px';
}

clearInterval(lib.page.prevId);
// for (var n=0;n<lib.page.prevId.length;n++) {
// clearInterval(lib.page.prevId[n]);
// };
// lib.page.prevId=[];

lib.page.index--;
lib.page.flag=false;
lib.Event.domUpdate.call(this,lib,'l');
if(lib.page.moveId.length==0){
lib.Event.start(lib,lib);
}
}
},5);
},
move:function(lib){
if(lib.page.flag) return;
lib.page.flag=true;
if(Math.abs(lib.point.pageX1-lib.point.pageX2)<lib.page.back){
var h = Math.abs(Math.abs(parseFloat(lib.page.domUL.style.marginLeft))-Math.abs(lib.page.bodyWidth*lib.page.index))
h = h/70;

var hi = 0;
var hid;
hid = window.setInterval(function(){

if(lib.point.pageX2>lib.point.pageX1){
lib.page.domUL.style.marginLeft = (parseFloat(lib.page.domUL.style.marginLeft) - h*5) +'px';
}else{

lib.page.domUL.style.marginLeft = (parseFloat(lib.page.domUL.style.marginLeft) + h*5) + 'px';
}
hi=hi+5;
if(hi>=70){
clearInterval(hid);
lib.page.domUL.style.marginLeft= -(lib.page.index*lib.page.bodyWidth) +'px';
lib.page.flag=false;
}
},5);
return;
}


if(lib.point.pageX1-lib.point.pageX2>0){
lib.Event.next.call(this,lib);
}else if(lib.point.pageX2-lib.point.pageX1>0){
// console.log("===")
lib.Event.prev.call(this,lib);
}
},
domUpdate: function(lib,type){
if(lib.page.isdom) return;
lib.page.isdom=true;

if(!lib.options.isfor){
var index = lib.page.liList[lib.page.index].getAttribute('index');
lib.options.callBack({"index":parseInt(index)+1});
lib.page.isdom=false;
return;
}
if(type=='l'){
lib.page.domUL.insertBefore(lib.page.liList[lib.page.liList.length-1],lib.page.liList[0]);
lib.page.domUL.style.marginLeft=-lib.page.bodyWidth+'px';//(parseFloat(lib.page.domUL.style.marginLeft)-lib.page.bodyWidth)+'px';
//lib.page.index++;
}else if(type=='r'){
lib.page.domUL.appendChild(lib.page.liList[0]);
lib.page.domUL.style.marginLeft=-lib.page.bodyWidth+'px';//(parseFloat(lib.page.domUL.style.marginLeft)+lib.page.bodyWidth)+'px';
//lib.page.index--;
}
lib.page.index=1;
// console.log(lib.page.index)
var index = lib.page.liList[lib.page.index].getAttribute('index');
lib.options.callBack({"index":parseInt(index)+1});
lib.page.isdom=false;
}
};
};
WapImage.prototype = {
setoption: function(arg){
for(var i in this.options){
this.options[i]= arg[i] !== undefined ? arg[i] : this.options[i];
}
if(!device){
this.eventName.touchstart='mousedown';
this.eventName.touchmove='mousemove';
this.eventName.touchend='mouseup';
}
//return temp;
},
bindEvent: function(){
var lib = this;
this.page.domUL.addEventListener(this.eventName.touchstart,function(event){lib.Event.handleEvent.call(lib,event,lib);},false);
w.addEventListener(this.eventName.touchmove,function(event){lib.Event.handleEvent.call(lib,event,lib);},false);
w.addEventListener(this.eventName.touchend,function(event){lib.Event.handleEvent.call(lib,event,lib);},false);
w.addEventListener('resize',function(){lib.init();},false);
},
init:function(){
this.page.bodyWidth=document.body.clientWidth;
this.page.liList= this.options.dom.getElementsByTagName('li');
this.page.domUL = this.options.dom.getElementsByTagName('ul')[0];
this.options.dom.style.width=this.page.bodyWidth+'px';

for(var i=0;i<this.page.liList.length;i++){
var item = this.page.liList[i];
var img = item.getElementsByTagName('img')[0];
item.setAttribute('index',i);
item.style.width=this.page.bodyWidth+'px';
img.style.width = this.page.bodyWidth+'px';
}
if(this.page.liList.length<3){
var length = this.page.liList.length;
if(length==1){
this.page.domUL.appendChild(this.page.liList[0].cloneNode(true));
this.page.domUL.appendChild(this.page.liList[0].cloneNode(true));
}else{
for(var i=0;i<length;i++){
this.page.domUL.appendChild(this.page.liList[i].cloneNode(true));
}
}

this.page.liList= this.options.dom.getElementsByTagName('li'); 
}
},
position:function(index){
this.Event.position.call(this,this,index);
},
next:function(){
this.Event.next.call(this,this);
},
prev:function(){
this.Event.prev.call(this,this);
},
start: function(arg){
this.setoption(arg);
this.init();
this.position();
this.bindEvent();
this.Event.domUpdate(this,'l');
this.Event.start(this);

}
};
var loaded=function(){
w.WapImage=new WapImage();
w.WapImages=new WapImage();
};
(function(){
if(d.body){
loaded();
}else{
if(d.addEventListener){
d.addEventListener( 'DOMContentLoaded', function(){
d.removeEventListener( 'DOMContentLoaded', arguments.callee, false );
loaded();
}, false );
}else if(d.attachEvent){
d.attachEvent( 'onreadystatechange', function(){
if( d.readyState === 'complete' ){
d.detachEvent( 'onreadystatechange', arguments.callee );
loaded();
}
});
}
}
})();
})(window,document,undefined);

window.onload = function(){
var obj = {
dom:document.getElementById('wapListImage'),
isupdate:true,
time:3000,
isfor:true,
leftOrright:'left',
callBack:function(obj){
var span = document.getElementById('wapListImage').getElementsByTagName('dl')[0].getElementsByTagName('span');
for(var k = 0;k<span.length;k++){
span[k].className='';
}
span[obj.index-1].className='selected'
// console.log(obj.index)
}
};
WapImage.start(obj);
WapImage.position(2)
var obj2 = {
dom:document.getElementById('wapListImage1'),
callBack:function(obj){
// console.log(obj.index)
}
};
WapImages.start(obj2);
// var img = new w.WapImage();
// img.start(obj);
}
</script>
</body>
</html>

Usage:

After the page loads 


var obj = {
dom:document.getElementById('wapListImage'),//Dom elements
isupdate:true,//Whether to switch automatically
time:3000,//The time of automatic switching is milliseconds
isfor:true, //Whether to loop, that is, whether to go to the last card directly to the first card, or to the first card directly to the last card
leftOrright:'left',//Auto switch like left or auto switch like right
callBack:function(obj){//After successful switching the callback function actually has the index parameter for the current picture

//Take care of
var span = document.getElementById('wapListImage').getElementsByTagName('dl')[0].getElementsByTagName('span');
for(var k = 0;k<span.length;k++){
span[k].className='';
}
span[obj.index-1].className='selected'
// console.log(obj.index)
}
};
WapImage.start(obj);
WapImage.position(2)

Var loaded=function() var loaded=function()

Define the number of images you need to switch, and specify the name

Such as

W.W apImage = new WapImage ();
W.W apImages = new WapImage ();

It can be called directly after the page loads

WapImage. Start () and WapImages. Start ()

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