Develop Reference

Load a jquery event only after the preloader ends

My website is : https://365arts.me/
So it loads about 16mbs of pics(Yes I know, I'm stupid. I'll try to change it very soon, also if someone could tell me a way to reduce size of do something else(like dynamic loading only when needed, if something like that exists) I'd be very grateful).
I added a preloader for it using:
[html]:
<div class="spinner-wrapper">
<div class="spinner">
<div class="dot1"></div>
<div class="dot2"></div>
</div>
</div>
and corresponging [jquery]:
<script>
$(document).ready(function() {
//Preloader
$(window).on("load", function() {
preloaderFadeOutTime = 500;
function hidePreloader() {
var preloader = $('.spinner-wrapper');
preloader.fadeOut(preloaderFadeOutTime);
}
hidePreloader();
});
});</script>
this works well but the problem is I have a javascript code that comes and says Hi! but it runs only for 2.8 seconds. So if loading takes up more than that, It doesnt show up. Can someone please tell me how to make sure that it loads only exactly after loading is completed.
Thanks a ton.
Code for my website:
https://github.com/richidubey/365-Days-Of-Art/blob/master/index.html

this may work
document.addEventListener('DOMContentLoaded', function() {
// your code here
}, false);
if you are happy with pure javascript

My first suggestion is to just get rid of the "Hi!" message since you already have a splash page in the form of the loader. But if you really want that second splash page, you can use the JQuery when() method:
$(window).on("load", function() {
$.when($('.spinner-wrapper').fadeOut(500)).then(displaySplashPage);
});
This assumes that displaySplashPage() is your function for showing the "Hi!" message.
You don't need $(document).ready() and window.on("load") here. Document ready waits for the HTML to be built, then applies event listeners/functions/etc to the structure. Window onload waits for everything to get loaded, then fires. In your case, you're trying to wait for all your pictures to load, so you only need onload.
You might need to have a container around all your main content set to opacity: 0 that switches to opacity: 1 as part of displaySplashPage(). That would prevent things from leaking through as you do the .fadeOut() on the loader.

JavaScript version - run js code when everything is loaded + rendered
window.onload = function() {
alert("page is loaded and rendered");
};
jQuery version (if you need it instead pure JS)
$(window).on('load', function() {
alert("page is loaded and rendered");
});
You can try this:
<script>
// Preloader
$(window).on("load", function() {
fadeOutTime = 500;
sayHelloDuration = 5000;
function hideSayHello() {
var sayHello = $('.say-hello');
sayHello.fadeOut(fadeOutTime);
}
function hidePreloader() {
var preloader = $('.spinner-wrapper');
preloader.fadeOut(fadeOutTime);
setTimeout(function() {
hideSayHello();
}, sayHelloDuration);
}
hidePreloader();
});
</script>
Also, remove the code from lines 83 ~ 87:
<script>
$(document).ready(function() {
$('.say-hello').delay(2800).fadeOut('slow');
});
</script>
About your website performance, you can improve a lot of things right now:
Use smaller thumbnail images on your front page, don't load FULL SIZE images at once. "work-showcase" section is really heavy without real necessity.
Try to incorporate src-set and smaller images for small screens, larger/heavier images for bigger screens. All modern browsers support it, and it will improve performance/loading speed.
Try to lazyload your big images, e.g. only when users scroll down to them, not before. It may take some work to integrate it with your image viewer, but it will additionally speed things up on initial load. My favorite library for this is this one: https://github.com/aFarkas/lazysizes but, you may find something else...
Unrelated to your original question, I have noticed that you have a bug in your HTML - see this screenshot. What kind of code editor do you use? Instead of empty space it apparently inserts invisible dots symbols which are not good. Actually, it's not the invisible dot (that's my editor's space indentation symbol), it's caused by 2 long dash (instead of short dash or minus) in your code after opening html comment tag:

How to add a "pin it" button dynamically?

I'm trying to optimize my Wordpress install - and one of the culprits I'm seeing, is the "Pin It" button widget for Pinterest. I'm now trying to find a way to dynamically load the JS code (when they initially hover over the button), and then apply it to the page. So far I've only managed to get this far:
jQuery(document).on("mouseenter click",'.pinItSidebar', function() {
jQuery.getScript("http://assets.pinterest.com/js/pinit_main.js", function() {
// do something here?
});
});
I can't seem to find a function that I can call (as a callback, after the JS is loaded). Obviously I will only do this once per page load (the above is just a very basic version at the moment)
Does anyone have any suggestions on how I can achieve this? The end game of how I want it to function, is with:
Working solution:
Here is a working solution I've now got, which will allow you to load the pinterest stuff ONLY when they click the button (and then trigger the opener as well). The idea behind this, is that it saves a ton of Pinterest JS/CSS / onload calls, which were slowing the page down.
jQuery(document).on("click",'.pinItSidebar', function() {
if (typeof PinUtils == "undefined") {
jQuery.getScript("http://assets.pinterest.com/js/pinit_main.js", function() {
PinUtils.build();
PinUtils.pinAny();
});
} else {
PinUtils.pinAny();
}
});
...and just call with:
foo
Hopefully this helps save someone else some time :)
Extra tweak: I'm just playing around, to see if I can make this even more awesome :) Basically, I want to be able to decide which images are pinnable. Below this will do that for you:
jQuery("img").each(function() {
if (jQuery(this).data('pin-do')) {
// its ok, lets pin
} else {
jQuery(this).attr('nopin',"1");
}
});
All you need to do to make an image pinnable, is have the data-pin-do="1" param set the images you want to allow them to share :)

MVC How to add a delay on page load

My question is pretty simple(i think, but i cant find any reference, who wants to slow down their site,right?) and may sound ridiculous, but what I am trying to do is to have a splash screen on page load of the Home/Index of my site.
What I did is at the top of my page, I just added a simple div for my splash and use javascript to hide it when the page is loaded.
$(window).bind("load", function () {
// Remove splash screen after load
$('.splash').css('display', 'none')
})
but my problem is, my home index loads too fast (because its just plain text/html) hence the splash screen shows like .5 sec only. I want to add atleast 2-3 secs before it is removed, Im assuming I just need to add a line or two of code in my $(window).bind to pause for a couple of secs before doing $('.splash').css('display', 'none') but I dont know what or how to do it, please help! Thank you!

You can use setTimeout() to delay things in Javascript, like this:
$(window).bind("load", function () {
var delay = 5000;
setTimeout(function () {
$('.splash').css('display', 'none');
}, delay);
});

Timeout works.
$(window).bind("load", function () {
// Remove splash screen after load and 3 seconds
setTimeout(function() {
$('.splash').css('display', 'none')
}, 3000);
});

How to refresh a Div every 10 seconds without refreshing the entire page?

I'm working on a website platform that doesn't allow for any server sided scripting, so jquery and javascript are pretty much all I have to work with. I am trying to create a script to work with the site that will update a div that contains an inbox message count every 10 seconds. I've been successful with making the div refresh every ten seconds, but the trouble lies in the page views count. My script is refreshing the whole page and counting for a page view, but I only want to refresh just the one div. An example of the trouble my script causes is when viewing anything on the site that has a page view counter (forum posts, blog posts, ect...), the page views go crazy because of the script refreshing. I'm pretty new to Javascript, so I'm not entirely sure there is a way around this.
What I'm working with is below:
<div id="msgalert" style="display: none"; "width: 100px !important">
You have $inbox_msg_count new messages.
</div>
$inbox_msg_count is a call that grabs the message count, and provided by the platform the site is on. It displays the message count automatically when used.
Then the script that does all the work is this:
<script>
setInterval(function(facepop){
var x= document.getElementById("SUI-WelcomeLine-InboxNum");
var z = x.innerText;
if(x.textContent.length > 0)
$("#msgalert").show('slow');
}, 1000);
facepop();
</script>
<script>
setInterval(function() {
$("#msgalert").load(location.href+" #msgalert>*","");
}, 1000); // seconds to wait, miliseconds
</script>
I realize I've probably not done the best job of explaining this, but that's because I'm pretty confused in it myself. Like I mentioned previously, this code function just how I want it, but I don't want it to refresh the entire page and rack up the page views. Any help is much appreciated.

You might try to look into iframe and use that as a way to update/refresh your content (div). First setup an iframe, and give it an id, then with JS grab the object and call refresh on it.

well your prob seems a little diff so i think submitting a from within the div might help you so ...
$(document).ready(function()
{
// bind 'myForm' and provide a simple callback function
$("#tempForm").ajaxForm({
url:'../member/uploadTempImage',//serverURL
type:'post',
beforeSend:function()
{
alert(" if any operation needed before the ajax call like setting the value or retrieving data from the div ");
},
success:function(e){
alert("this is the response data simply set it inside the div ");
}
});
});

I think this could probably be done without a form, and definitely without iframes (shudder)..
Maybe something like this?
$(document).ready(function()
{
setInterval(function(facepop)
{
var x= document.getElementById("SUI-WelcomeLine-InboxNum");
var z = x.innerText;
if(x.textContent.length > 0)
$("#msgalert").show('slow');
$.ajax({
type: "POST",
url: location.href,
success: function(msg)
{
$("#msgalert").html(msg);
}
});
},1000);
It's not entirely clear exactly what you're trying to do (or it may just be that I'm ultra tired (it is midnight...)), but the $.ajax() call in the above is the main thing I would suggest.
Encapsulating both functions in a single setInterval() makes things easier to read, and will extinguish the 1 second gap between showing the msgalert element, and "re-loading" it.

using javascript setTimeout to see if div has loaded

I'm loading remote data using dynamic script tags and JSON. the remote page that I'm displaying on my website has a div in it that I use to load content into.
The problem is the javascript functions do not see the div as the page loads because it is remote data. If I set a timeout of about 300, it usually works and my javascript can see the div. But sometimes it takes longer and it breaks the javascript.
I'm tring this:
function load_content() {
if (document.getElementById('remote_div') == null) {
setTimeout('load_content()', 300);
} else {
document.getElementById('remote_div').innerHTML = 'Content goes here'
}
}
but it just doesn't work. What am I doing wrong?

You may want to do this using setInterval. Something like:
var intrval = setInterval( function(){
if(document.getElementById('remote_div')) {
load_content();
clearInterval(intrval);
}, 50);
function load_content() {
//loading content here
}
This way you don't have to estimate the loading time. load_content is executed when div#remote_div can be found in the DOM tree.
Edited based on comments, forgot to assign the interval, so it wouldn't ever clear indeed.

Are you using iframe?
If so, try
document.getElementById('YOUR_IFRAME_ID').contentWindow.document.getElementById('remote_div')