js realizes upper and lower layer movement compatible with IE and FF
- 2020-06-03 05:51:09
- OfStack
Here is a small requirement from the project that was very simple but took a long time to get FF compatibility right.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title> imitation 265 The movement of the upper and lower layers ( Move up , Move down ) support IE , FF</title>
<style type="text/css">
/*<![CDATA[*/
ul{
width:400px
}
li{
border:1px solid gray;
list-style:none
}
.txt{
padding:4px;
background-color:#ffffff
}
/*]]>*/
</style>
<script language="javascript" type="text/javascript">
//<![CDATA
window.onload=function(){
ggGroup(document.getElementById('test'),5);
};
function ggGroup(ele,margin){
margin=margin||0;
var bgcolors='#b3d580,#99c9b1,#b4a1d8,#f7c480,#d5d588,#eea2bb'.split(',');
var txtUp=' Move up write ',txtDown=' Down left ';
var panels=children(ele);
for(var i=0,h=0;i<panels.length;i++){
var p=panels[i];
p.style.position='absolute';
p.style.width='100%';
var b=document.createElement('div');
with(b.style){
fontSize='12px';
padding='4px';
backgroundColor=bgcolors[i%bgcolors.length];
textAlign='right';
}
b.innerHTML='<span>'+txtUp+'</span><span>'+txtDown+'</span>';
b.firstChild.onclick=moveup;
b.firstChild.style.cursor='pointer';
b.lastChild.onclick=movedown;
b.lastChild.style.cursor='pointer';
p.insertBefore(b,p.firstChild);
p.style.top=h+'px';
p.index=i;
h+=p.offsetHeight+margin;
}
ele.style.height=h+'px';
ele.style.position='relative';
check(0,i-1);
function check(){
for(var i=0;i<arguments.length;i++){
var x=arguments[i];
var c=panels[x].firstChild.childNodes;
c[0].style.visibility=x==0?'hidden':'visible';
c[1].style.visibility=x==panels.length-1?'hidden':'visible';
panels[x].index=x;
}
}
function moveup(evt){
var p=evt?evt.target:event.srcElement;
p=p.parentNode.parentNode;
swap(p,panels[p.index-1]);
}
function movedown(evt){
var p=evt?evt.target:event.srcElement;
p=p.parentNode.parentNode;
swap(p,panels[p.index+1]);
}
function swap(p1,p2){
var N=10;
var INTV=200;
var arr1,arr2;
var t1=parseInt(p1.style.top),t2=parseInt(p2.style.top);
var h1=p1.offsetHeight+margin,h2=p2.offsetHeight+margin;
arr1=makeArr(t1,t1<t2?h2:-h2);
arr2=makeArr(t2,t1<t2?-h1:h1);
for(var i=0;i<N;i++)(function(){
var j=i;
setTimeout(function(){
p1.style.top=arr1[j]+"px";
p2.style.top=arr2[j]+"px";
if(j==N-1){
panels[p1.index]=p2;
panels[p2.index]=p1;
check(p1.index,p2.index);
}
},(j+1)*INTV/N);
})();
function makeArr(f,x){
var ret=[];
for(var i=0;i<N;i++)
ret[i]=Math.round(f+i*x/(N-1));
return ret;
}
}
function children(e){
var ret=[];
for(var i=0,c=e.childNodes;i<c.length;i++)
if(c[i].nodeType==1)
ret.push(c[i]);
return ret;
}
}
//]]>
</script>
</head>
<body>
<ul id="test">
<li> <div class="txt"><h2>Hello<br />baby</h2></div></li>
<li> <div class="txt">
According to the content 1 According to the content 1 According to the content 1 According to the content 1
</div></li>
<li>
<div class="txt">
<i> Man is born good </i>
</div></li>
<li>
<div class="txt">
According to the content 2<br /> According to <br />...<br /> According to the content 2 !
</div></li>
</ul>
</body>
</html>
This is the end of this article, I hope you enjoy it.