external javascript loading but not working - javascript

I have a java script that is embedded in the html file with the script tag and it works fine. javascript code is for smooth scroll into the top of the page when a link is clicked.
<script type="text/javascript">
$(".scroll").click(function(event){
event.preventDefault();
//calculate destination place
var dest=0;
if($(this.hash).offset().top > $(document).height()-$(window).height()){
dest=$(document).height()-$(window).height();
}else{
dest=$(this.hash).offset().top;
}
//go to destination
$('html,body').animate({scrollTop:dest}, 1200,'swing', function() {
$('input#Name_First').focus();
});
});
</script>
But when I try to have it as external java script it doesn't work.
<script type="text/javascript" src="$!{cdnServerPath}css/lp/js/action.js"></script>
code in action.js file
$(".scroll").click(function(event){
event.preventDefault();
//calculate destination place
var dest=0;
if($(this.hash).offset().top > $(document).height()-$(window).height()){
dest=$(document).height()-$(window).height();
}else{
dest=$(this.hash).offset().top;
}
//go to destination
$('html,body').animate({scrollTop:dest}, 1200,'swing', function() {
$('input#Name_First').focus();
});
});
Following are the things I noticed.
I am including the jquery -2.1.1.js file before the action.js is called.
action.js is being loaded- I checked it in the net tab of firebug.
I put a random alert statement in action.js. It is being triggered when the page is being laoded but not when I click the link.
I appreciate any help in getting this thing fixed.
Thanks.

The location of your script include is very important. If you include code in the header, it will not be able to access dom elements until the dom is loaded, however, if you placed it before the closing body tag, it would be able to access the dom elements immediately.
If you must place your include in the <head>, you'll have to wait for the DOMContentLoaded event, which with jQuery can be done using the $.fn.ready method.
$(document).ready(function () {
// your code
});
Many more recent tutorials suggest placing your script includes before the closing body tag to allow your page content to load before the javascript loads because loading javascript is a blocking action, meaning, it will stop the downloading of all other things until it is complete. Adding it to the bottom of course also has the benefit of not needing to worry with the DOMContentLoaded event.
It also helps to have all of your script includes together and style includes together (separately) so that they will download in parallel.

Related

Javascript/Jquery execution order issue

I am using external JavaScript to show video player on web page like...
<script src='http://player.field59.com/v3/vp/...........'></script>
Here is my code that cut the HTML code which is generated by above script tag and paste into specific container like <div id='dynamic-video-container'></div>
$(document).ready(function(){
if( $("div.subscriber-hide div.html-content div.bimVideoPlayer").length ) {
var video_content = $('<span>').append($('div.subscriber-hide div.bimVideoPlayer').clone()[0]).remove().html();
}
$('div.subscriber-hide div.html-content').remove();
$("div#dynamic-video-container").html(video_content);
});
I am doing this because I am not able to put external code directly into "<div id='dynamic-video-container'></div>" container.
My issue is this sometimes play functionality of video player is not working may be due to loading sequence of external code and code snippet.
Is there any option by which code snippet will execute when external js becomes fully loaded? Can anyone suggest idea to how to do this?
One more thing external code "<script src='http://player.field59.com/v3/vp/...........'></script>" is added by CMS so I am unable to change this line.
Try this
window.onload = function() {
//your code comes here
}
As window.onload is called after all the content and resources of the page are loaded. Hope this helps.

jquery: exclude external resources from $(window).load()

I need to execute some scripts when all the resources on my domain and subdomain are loaded, so I did this:
$(window).load(function(){
// al my functions here...
}
The problem is that there are some external resources (not on my domain and subdomain) that sometimes take longer to load. Is there a way to exclude external resources from the load event?
EDIT:
I was hoping to do something like:
$(window).not(".idontcare").load(function()
but it's not working
I guess your external resources rely on a src attribute.
If so, in your page source code you could set the src attribute of the resources you don't want to wait for, not as src but as external_src.
Then you could easily do:
$(document).ready(function(){
$(window).load(function(){
// all your functions here...
});
$('[external_src]').each(function() {
var external_src = $(this).attr("external_src");
$(this).attr("src", external_src); // now it starts to load
$(this).removeAttr("external_src"); // keep your DOM clean
//Or just one line:
//$(this).attr("src", $(this).attr("external_src")).removeAttr("external_src");
});
});
This way the external resources should start loading as soon as just the DOM is ready, without waiting for the full window load.
I have almost same case. But in my case, I want to exclude all iframes that load content from another site (e.g. youtube, vimeo etc). Found a work around, so the scenario is hide 'src' attribute from all iframes when DOM is ready and put it back when window is finish load all another content.
(function($){
//DOM is ready
$(document).ready(function(){
var frame = $('iframe'),
frameSrc = new Array();
if( frame.length ){
$.each( frame, function(i, f){
frameSrc[i] = $(f).attr('src');
//remove the src attribute so window will ignore these iframes
$(f).attr('src', '');
});
//window finish load
$(window).on('load',function(){
$.each( frame, function(a, x){
//put the src attribute value back
$(x).attr('src', frameSrc[a]);
});
});
}
});
})(jQuery);
You can mark all elements in your site that load external resources by adding a special class, and change the iframe with $('.special_class') or something like that. I dont know if this is the best way but at least it works great in my side :D
Unfortunately, the window.onload event is very strict. As you might know it will fire when all und every resource was transfered and loaded, images, iframes, everything. So the quick answer to your question is no, there is no easy-to-use way to tell that event to ignore external resources, it makes no difference there.
You would need to handle that yourself, which could be a tricky thing according to how those resources are included and located. You might even need to manipulate the source code before it gets delivered to accomplish that.
As far as I know, there is an async - tag for script tags. You can your includes to:
<script src="script_path" async="true"></script>
This will not include them to the event.
maybe
$(document).ready(...)
instead of $(window).load() will help?
The document ready event executes already when the HTML-Document is loaded and the DOM is ready, even if all the graphics haven’t loaded yet.

$(document).ready can't replace js declared at bottom of the page, but I need to have the script at the top

I have JQuery based tab navigation that only works if it is placed after the html for the menu. It works if it's placed at the end too, but breaks when I put the same script in $(document).ready ath the top.
I thought that this (placed at the top of the page):
<script type="text/javascript">
$(document).ready(function(){
mouseovertabsmenu.init("mytabsmenu", "mysubmenuarea", true);
});
</script>
would be the same as this:
<script type="text/javascript">
mouseovertabsmenu.init("mytabsmenu", "mysubmenuarea", true);
</script>
</html>
Which is placed at the bottom of the page and works. How would I be able to put the function at the top or even include it from a separate file?
I had this problem and I had used this in the head after the jquery include link:
$(document).ready(myfunction());
This failed due to objects not being loaded. I should have wrapped my call in a function:
$(document).ready(function () {
myfunction();
});
This worked as expected only after the document was properly loaded.
The reason it is recommended to place the script at the end of the page , is so that the HTML elements are loaded onto the page before you try to access them..
No matter where you place the code it is better to wrap in DOM ready event which makes sure the complete HTML document is properly loaded before you try to access the elements in the page..
Maybe in your case
<script type="text/javascript">
mouseovertabsmenu.init("mytabsmenu", "mysubmenuarea", true);
</script>
seems to be working when not encased in DOM ready is the function is not accessible as it's scope is being blocked by DOM ready

Changing content of a div with clicking on a div [jQuery]

I'm trying to change the content of the portfolio section of my website. I have a div called .portfolio_box, which contains a small preview of the project (each project div also has a different id). When you click on this div (.portfolio_box) I want the content of the content div (#main_content) to go away and be replaced with the corresponding content.
I found the following tutorial and adjusted the script to my needs:
<script type="text/javascript">
$(document).ready(function()
{
$("#thomasschoof_old").click(function()
{
/*hide( 'fast', function()
{
$('#main_content').load(thomasschoof_old.html,'',showNewContent);
} );
var toLoad = $(this).attr('href')+' #main_content'; */
$('#main_content').hide('fast',loadContent);
$('#page').append('<span id="load">LOADING...</span>');
$('#load').fadeIn('normal');
});
function loadContent()
{
$('#main_content').load('thomasschoof_old.html #project','',showNewContent)
}
function showNewContent()
{
$('#main_content').show('normal',hideLoader);
}
function hideLoader()
{
$('#load').fadeOut('normal');
}
return false;
});
</script>
But when I click on the div #thomasschoof_old nothing happens. I don't know a lot about jQuery or Javascript (just getting into it) and I really can't get it figured out.
You can view the web page here: http://jowannes.com/thomasschoof/portfolio.html
I hope somebody can help me, Thanks in advance!
Thomas
Your problem is, that you wrote your JS code inside scripts tags that are used to load an external script file (jQuery). You script just wont ge executed that way.
src: This attribute specifies the URI of an external script; this can
be used as an alternative to embedding a script directly within a
document. script elements with an src attribute specified should not
have a script embedded within its tags.
From: https://developer.mozilla.org/en-US/docs/HTML/Element/Script
Set up a separate script tag for you code or include it from a second external script-file and see what happens.

Removing a script tag with a specific content using jquery

I have a page that i dont have access to its an obvius site. I would like to remove a script html tag with a content. For now i have this but is not working. I am using userscripts like coding!
function main(){
var def = $('script[type="text/javascript"]').html();
$('script[type="text/javascript"]').each(function() {
if (def == 'document.write("<scr"+"ipt type=\'text/javascript\' src=\'http://storing.com/javascripts/"+(new Date()).getTime()+"/3e155555e1b26c2d1ced0f645e_1_1.js\'></scr"+"ipt>")')
$('script[type="text/javascript"]').remove();
}
}
UPDATE:
<script type="text/javascript">document.write("<scr"+"ipt type='text/javascript' src='http://somedomain.com/javascripts/"+(new Date()).getTime()+"/3e1a0cd37f25a6e1b26c2d1ced0f645e_1_1.js'></scr"+"ipt>")</script>
This is the whole script what i want to remove... it inserts a div that i am removing right now i just wanted to know if there is any other method. BUt as i see the only is the hosts file thing :)
I don't believe this will work, since a loaded script will already have run.
That said, you probably want something like this:
$('script').each(function() {
if (this.src.substring(0, 31) === 'http://storing.com/javascripts/') {
$(this).remove();
}
});
It's impossible to match the <script> tag based on the output of .html() because that only returns the contents of the element, and not the outer <script> element nor the element's attributes.
When a script is loaded in a page, it is evaluated and executed by the browser immediately after. After the script has been executed, the content of the script tag is irrelevant.
You might be able to achieve what you want by unbinding the events which might have been loaded by the script. Are there any events you want to disable?
If the script is in a certain domain and you want to block all traffic to it, you could add the following entry to your hosts file:
127.0.0.1 storing.com
This will prevent the request to reach it's destination.

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