I've recently added to my website, a responsive loading icon while the page loads. Except I would like to show the image whilst a JavaScript function is being executed because if the user runs the script a second time before the first xmlhttp request is finished, it wont work properly.
$(window).load(function() { $(".se-pre-con").fadeOut("slow"); });
.no-js #loader { display: none; } .js #loader { display: block; position: absolute; left: 100px; top: 0; } .se-pre-con { position: fixed; left: 0px; top: 0px; width: 100%; height: 100%; z-index: 9999; background: url(images/loader-64x/Preloader_2.gif) center no-repeat #fff; }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script> <div class="se-pre-con"></div>
Is there a way of modifying the jQuery to work better for me? or do you guys have a completely different solution that will still solve the problem?
If you are using this for AJAX. Use following way to show/hide loader.
$(".se-pre-con").show(); // before initiate ajax call
$.ajax({
url: "test.html",
context: document.body
}).done(function() {
$(".se-pre-con").hide();
});
Some light plugin (2kb) like https://github.com/jgerigmeyer/jquery-loading-overlay exist and can be used like this :
to start :
$('#target').loadingOverlay();
and to stop :
$('#target').loadingOverlay('remove');
Just put it in your function and don't forget to do a synchronous call or it will mean nothing :)
If I am understanding your requirements clearly then I think that You want to add a loading image before your xmlhttp request and when request work complete then it goes off.
first add below code in html file
<div id="loadingDiv">
<div id="popupContact">
</div>
</div>
following lines in your css and don't forget to add a bg.png
image in your images folder which you want for your loading image
#loadingDiv {
width: 100%;
height: 100%;
top: 0;
left: 0;
display: none;
position: fixed;
background: url(../images/bg.png) repeat;
overflow: auto;
z-index: 100000;
}
div#popupContact {
position: fixed;
left: 48%;
top: 40%;
background: url(../images/loading.gif) no-repeat;
width: 100%;
height: 100%;
float: left;
}
then add following two methods in your js file
//it will show process image
function showProcessImg(){
$('#loadingDiv').css('display','block');
}
//it will hide process image
function hideProcessImg(){
$('#loadingDiv').css('display','none');
}
call to showProcessImg() before your httprequest and call hideProcessImg() in your success or error call back of httprequest as following
showProcessImg();
$.ajax({
url:'',
method:'POST',
success:function(response){
hideProcessImg();
},
error:function(){
//disable loading image
hideProcessImg();
alert('Error occur here');
}
});
just create an overlay div
and then toggle its display
property.
heres a fiddle for it. Note no image needed, but youll need a css3 supporting browser.
#waiting-container {
position: fixed;
width: 100%;
height: 100%;
z-index: 1130;
display: hide;
}
#waiting-container #waiting-spinner {
position: absolute;
width: 100%;
height: 100%;
z-index: 1132;
}
#waiting-spinner .spinner {
position: absolute;
left: 50%;
top: 50%;
height: 40px;
width: 40px;
margin: 0 auto;
-webkit-animation: rotation .6s infinite linear;
-moz-animation: rotation .6s infinite linear;
-o-animation: rotation .6s infinite linear;
animation: rotation .6s infinite linear;
border-left: 6px solid rgba(0, 174, 239, .15);
border-right: 6px solid rgba(0, 174, 239, .15);
border-bottom: 6px solid rgba(0, 174, 239, .15);
border-top: 6px solid rgba(0, 174, 239, .8);
border-radius: 100%;
}
@-webkit-keyframes rotation {
from {
-webkit-transform: rotate(0deg);
}
to {
-webkit-transform: rotate(359deg);
}
}
@-moz-keyframes rotation {
from {
-moz-transform: rotate(0deg);
}
to {
-moz-transform: rotate(359deg);
}
}
@-o-keyframes rotation {
from {
-o-transform: rotate(0deg);
}
to {
-o-transform: rotate(359deg);
}
}
@keyframes rotation {
from {
transform: rotate(0deg);
}
to {
transform: rotate(359deg);
}
}
#waiting-container #waiting-overlay {
position: absolute;
width: 100%;
height: 100%;
background: black;
opacity: .5;
z-index: 1131;
}
All the answers given here are good, but this is what you can try if you want the loader image by default for all AJAX requests:
<body> </body> <div class="modalLoader"></div>
<script> $body = $("body"); $(document).on({ ajaxStart: function() { $body.addClass("loading");}, ajaxStop: function() { $body.removeClass("loading");} }); </script>
.modalLoader { display: none; position: fixed; z-index: 1500; top: 0; left: 0; height: 100%; width: 100%; background: rgba( 255, 255, 255, .8 ) url('../img/loaders/loader.gif') 50% 50% no-repeat; } body.loading { overflow: hidden; } body.loading .modalLoader { display: block; }
Thanks
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