jeena/en.javascript.info
1
0
Fork 0
Code Issues Pull requests Projects Packages Wiki Activity Actions

renovations

Browse source
This commit is contained in:
Ilya Kantor 2015-02-16 00:00:48 +03:00
parent 0eabad2516
commit 9bf1b61cab
72 changed files with 299 additions and 670 deletions
Download patch file Download diff file Expand all files Collapse all files

98
2-ui/3-event-details/8-onscroll/2-updown-button/solution.view/index.html Normal file
View file

@ -0,0 +1,98 @@
<!DOCTYPE HTML>
<html>
<head>
<style>
body, html {
height:100%;
width: 100%;
padding: 0;
margin: 0;
}
#matrix {
width: 400px;
margin: auto;
overflow: auto;
text-align: justify;
}
#updown {
height: 9px;
width: 14px;
color: green;
position: fixed;
top: 10px;
left: 10px;
cursor: pointer;
}
#updown.up::before {
content: '▲';
}
#updown.down::before {
content: '▼';
}
</style>
<meta charset="utf-8">
</head>
<body>
<div id="matrix">
<script>for (var i = 0; i < 2000; i++) document.writeln(i)</script>
</div>
<div id="updown"></div>
<script>
var updownElem = document.getElementById('updown');
var pageYLabel = 0;
updownElem.onclick = function() {
var pageY = window.pageYOffset || document.documentElement.scrollTop;
switch(this.className) {
case 'up':
pageYLabel = pageY;
window.scrollTo(0, 0);
this.className = 'down';
break;
case 'down':
window.scrollTo(0, pageYLabel);
this.className = 'up';
}
}
window.onscroll = function() {
var pageY = window.pageYOffset || document.documentElement.scrollTop;
var innerHeight = document.documentElement.clientHeight;
switch(updownElem.className) {
case '':
if (pageY > innerHeight) {
updownElem.className = 'up';
}
break;
case 'up':
if (pageY < innerHeight) {
updownElem.className = '';
}
break;
case 'down':
if (pageY > innerHeight) {
updownElem.className = 'up';
}
break;
}
}
</script>
</body>
</html>