How to make a progress bar using HTML and JavaScript
Question
I am trying to make a progress bar just for looks, but it doesn't work. Here is the code:
<!DOCTYPE html>
<html>
<head>
<title>Page 1</title>
<style>
#loader {background-color:#ffffff;position:absolute;top:0px;left:0px;width:100%;height:100%;}
#loadertitle {position:relative;top:20px;left:39%;font-size:120px;}
#loadingdiv {position:relative;top:47%;left:43%;width:180px;height:55px;}
#loadingbar {position:absolute;top:50%;left:0px;width:100%;height:8px;background-color:#794c79;}
#loadingbarprogress {position:relative;top:0px;left:0px;height:100%;width:0%;background-color:#400040;}
#loadingtext {position:relative;top:13%;left:46%;}
</style>
<script>
var progress = document.getElementById('loadingbarprogress');
loadingbar(progress, 500);
function doMove() {
progress.style.width = parseInt(progress.style.width) + 1 +'%';
if (progress.style.width = '100%') {
progress = null;
}
setTimeout(doMove,20);
}
</script>
</head>
<body>
<div id="loader">
<h1 id="loadertitle">Site</h1>
<div id="loadingbar">
<div id="loadingbarprogress">
</div>
</div>
<p id="loadingtext">Loading...</p>
</div>
</body>
</html>
I have a div for the loader, a div for the progress, and some script containing a loop (that might not work), changing the width of the progress div.
Fixed code:
<!DOCTYPE html>
<html>
<head>
<title>Page 1</title>
<style>
#loader {background-color:#ffffff;position:absolute;top:0px;left:0px;width:100%;height:100%;}
#loadertitle {position:relative;top:20px;left:39%;font-size:120px;}
#loadingbar {position:absolute;top:50%;left:0px;width:100%;height:8px;background-color:#794c79;border:none}
#loadingbar::-moz-progress-bar {background-color:#400040;}
#loadingtext {position:relative;top:13%;left:46%;}
</style>
<script>
var bar = document.getElementById('loadingbar');
for (int x = 0; x <= 100; x++) {
bar.value = x;
}
</script>
</head>
<body>
<div id="loader">
<h1 id="loadertitle">Site</h1>
<progress id="loadingbar" value="10" max="100"></progress>
<p id="loadingtext">Loading...</p>
</div>
</body>
</html>
Thanks, Cameron!
2 answers
solution1
3 ACCPTED 2014-08-20 01:26:36
HTML5 now has a progress element .
You can get a lot of customisation in some browsers. See the link to css-tricks above, it goes into a fair amount of detail.
<progress max="100" value="80" id="progress_bar"></progress>
Then you can just update the value attribute using javascript, with whatever data source your progress comes from.
If you just want it to increase at a steady rate, use a simple setTimeout:
var progress_element = document.getElementById('progress_bar');
function stepProgress() {
progress_element.value += 1;
if(progress_element.value < 100) {
setTimeout(stepProgress, 100);
}
};
You may need to use parseInt on your progress_element.value , or just have a separate counter variable.
solution2
1
There is a problem in your code. So far I noticed this:
if (progress.style.width = '100%') {//<-- single equals sign, its assignment not condition !
EDIT:
Try this then
if (progress.style.width == '100') {
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