How to show a running progress bar while page is loading
JavascriptJqueryCssHtml5 CanvasJavascript Problem Overview
I want to show a running progress bar while my page is loading like here, in my page. I used a simple loading image in my example, but I want to convert it in a running progress bar. Here is my code:
$(window).load(function() {
alert("hi");
$('#loading').hide();
});
#loading {
width: 100%;
height: 100%;
top: 0px;
left: 0px;
position: fixed;
display: block;
opacity: 0.7;
background-color: #fff;
z-index: 99;
text-align: center;
}
#loading-image {
position: absolute;
top: 100px;
left: 240px;
z-index: 100;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.0/jquery.min.js"></script>
<div id="loading">
<img id="loading-image" src="http://cdn.nirmaltv.com/images/generatorphp-thumb.gif" alt="Loading..." />
</div>
<div id="txt">
<h2>Let AJAX change this text</h2>
</div>
<button>Change Content</button>
Here is a JSFiddle
Javascript Solutions
Solution 1 - Javascript
I have copied the relevant code below from This page. Hope this might help you.
$.ajax({
xhr: function() {
var xhr = new window.XMLHttpRequest();
//Upload progress
xhr.upload.addEventListener("progress", function(evt) {
if (evt.lengthComputable) {
var percentComplete = evt.loaded / evt.total;
//Do something with upload progress
console.log(percentComplete);
}
}, false);
//Download progress
xhr.addEventListener("progress", function(evt) {
if (evt.lengthComputable) {
var percentComplete = evt.loaded / evt.total;
//Do something with download progress
console.log(percentComplete);
}
}, false);
return xhr;
},
type: 'POST',
url: "/",
data: {},
success: function(data) {
//Do something success-ish
}
});
Solution 2 - Javascript
It’s a chicken-and-egg problem. You won’t be able to do it because you need to load the assets to display the progress bar widget, by which time your page will be either fully or partially downloaded. Also, you need to know the total size of the page prior to the user requesting in order to calculate a percentage.
It’s more hassle than it’s worth.
Solution 3 - Javascript
Simple Steps, follow them and i guess it will solve your problem
Include these Css in your page,
.progress {
position: relative;
height: 2px;
display: block;
width: 100%;
background-color: white;
border-radius: 2px;
background-clip: padding-box;
/*margin: 0.5rem 0 1rem 0;*/
overflow: hidden;
}
.progress .indeterminate {
background-color:black; }
.progress .indeterminate:before {
content: '';
position: absolute;
background-color: #2C67B1;
top: 0;
left: 0;
bottom: 0;
will-change: left, right;
-webkit-animation: indeterminate 2.1s cubic-bezier(0.65, 0.815, 0.735, 0.395) infinite;
animation: indeterminate 2.1s cubic-bezier(0.65, 0.815, 0.735, 0.395) infinite; }
.progress .indeterminate:after {
content: '';
position: absolute;
background-color: #2C67B1;
top: 0;
left: 0;
bottom: 0;
will-change: left, right;
-webkit-animation: indeterminate-short 2.1s cubic-bezier(0.165, 0.84, 0.44, 1) infinite;
animation: indeterminate-short 2.1s cubic-bezier(0.165, 0.84, 0.44, 1) infinite;
-webkit-animation-delay: 1.15s;
animation-delay: 1.15s; }
@-webkit-keyframes indeterminate {
0% {
left: -35%;
right: 100%; }
60% {
left: 100%;
right: -90%; }
100% {
left: 100%;
right: -90%; } }
@keyframes indeterminate {
0% {
left: -35%;
right: 100%; }
60% {
left: 100%;
right: -90%; }
100% {
left: 100%;
right: -90%; } }
@-webkit-keyframes indeterminate-short {
0% {
left: -200%;
right: 100%; }
60% {
left: 107%;
right: -8%; }
100% {
left: 107%;
right: -8%; } }
@keyframes indeterminate-short {
0% {
left: -200%;
right: 100%; }
60% {
left: 107%;
right: -8%; }
100% {
left: 107%;
right: -8%; } }
Then include the progress bar your body tag,
<div class="progress" id="PreLoaderBar">
<div class="indeterminate"></div>
</div>
then it will start as your page loads, and now what you have to do is just hide this when the page loads,or set the visibility to none, or hidden, using javascript,
document.onreadystatechange = function () {
if (document.readyState === "complete") {
console.log(document.readyState);
document.getElementById("PreLoaderBar").style.display = "none";
}
}
Let me Know if you face any problems and also, you can add any type of progress bar you can easily find them, for this example i have used a indeterminate progress bar.
Solution 4 - Javascript
In this sample, I created a JavaScript progress bar (with percentage display), you can control it and hide it with JavaScript.
In this sample, the progress bar advances every 100ms. You can see it in JSFiddle
var elapsedTime = 0;
var interval = setInterval(function() {
timer()
}, 100);
function progressbar(percent) {
document.getElementById("prgsbarcolor").style.width = percent + '%';
document.getElementById("prgsbartext").innerHTML = percent + '%';
}
function timer() {
if (elapsedTime > 100) {
document.getElementById("prgsbartext").style.color = "#FFF";
document.getElementById("prgsbartext").innerHTML = "Completed.";
if (elapsedTime >= 107) {
clearInterval(interval);
history.go(-1);
}
} else {
progressbar(elapsedTime);
}
elapsedTime++;
}
Solution 5 - Javascript
Take a look here.
It definitely solves your problem for complete tutorial here is the link
DEMO
document.onreadystatechange = function(e) {
if (document.readyState == "interactive") {
var all = document.getElementsByTagName("*");
for (var i = 0, max = all.length; i < max; i++) {
set_ele(all[i]);
}
}
}
function check_element(ele) {
var all = document.getElementsByTagName("*");
var totalele = all.length;
var per_inc = 100 / all.length;
if ($(ele).on()) {
var prog_width = per_inc + Number(document.getElementById("progress_width").value);
document.getElementById("progress_width").value = prog_width;
$("#bar1").animate({
width: prog_width + "%"
}, 10, function() {
if (document.getElementById("bar1").style.width == "100%") {
$(".progress").fadeOut("slow");
}
});
} else {
set_ele(ele);
}
}
function set_ele(set_element) {
check_element(set_element);
}
body
{
margin:0px; auto;
padding:0px;
font-family:helvetica;
}
.progress
{
position: fixed;
left: 0px;
top: 0px;
width: 100%;
height: 100%;
z-index: 9999;
background-color: #F2F2F2;
}
.bar
{
background-color: #819FF7;
width:0%;
height:5px;
border-radius: 3px;
}
.percent
{
position:absolute;
display:inline-block;
top:3px;
left:48%;
}
#wrapper
{
width:995px;
padding:0px;
margin:0px auto;
font-family:helvetica;
text-align:center;
}
h1
{
text-align:center;
font-size:35px;
margin-top:60px;
color:#A9BCF5;
}
h1 p
{
text-align:center;
margin:0px;
font-size:18px;
text-decoration:underline;
color:grey;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class='progress' id="progress_div">
<div class='bar' id='bar1'></div>
<div class='percent' id='percent1'></div>
</div>
<div id="wrapper">
<div id="content">
<h1>Display Progress Bar While Page Loads Using jQuery<p>TalkersCode.com</p></h1>
</div>
</div>
<input type="hidden" id="progress_width" value="0">