How do I call a function after a jquery load - javascript

I use jquery load to put a html structure in my body page. Afterwards, I want to call another function to display the table headers. It is suppose to run the function after the load. However, when I insert the completion function in the load parameters, the load is never complete. If I take it out, I don't get to call my function.
app.js
function insertHTML(){
var thead = document.getElementByID("thead");
thead.innerHTML = theadOutput(); //function works fine
}
window.onload = function(){
$(body).load(body_loc, insertHTML());
}

You need to pass the function reference, instead of calling it:
$(body).load(body_loc, insertHTML);

Related

Can I make Javascript always call a method after JQuery Load?

We have started using jquery load in our site to load contents into a div rather than re-loading whole page. However in the complete function we have a method that re-applies various bindings. Is it possible to provide load method with a default complete function? So developers don't have to specify it in the jquery load complete function.
As we currently are providing a lot of duplicate complete functions
E.g.
$('#Target').load(callBackRedirect, function () {
ApplyBindings('#Target');
});
These bindings can't be applied using on and need to be re-applied on page loads. We also do some other work that we want to do on every page load.
The answer is no.
You need the callback because that's what the method calls when the request is done.
This works with on method to, you might be doing something wrong out there in the code.
You could create a helper function for this.
function loadSomething(targetElement, uri,callback) {
targetElement.load(uri, callback);
}
loadSomething(
$('myElement'),
'mylink.com/content',
function() {
applyBindings($(this));
}
)
Yes. Check out the list of Global AJAX Event Handlers.
e.g.
$(document).ajaxComplete(function() {
alert('Triggered ajaxComplete handler.');
});
That said, you shouldn't need to reapply your bindings after an AJAX call. If you need to do this, you're probably doing something wrong. Check out jQuery.on, which explains how to bind to content which is added dynamically.
Try $.ajaxSetup:
$.ajaxSetup({
complete: function() {
ApplyBindings('#target');
}
});
EDIT
You could also make a named function like:
var ajaxApplyBindings = function() {
ApplyBindings('#Target');
// anything else...
};
And then pass it to load:
$('#Target').load(callBackRedirect, ajaxApplyBindings);

jQuery event wait until the data gets loaded in page

I am loading my partial views in a page using $("div").load(url) event. So that Page will render faster. But with this $(document).ready is getting fired even before the content gets loaded.
I have tried $(window).load also, but this is also getting fired even before the content loading.
Can you please suggest a way to wait until the data gets loaded then only execute my javascript functions.
When you are using $("div").load(url), You are loading the url content asynchronously.
Which means that document.load is first initialised and then async call is made to load(url).
Put all your initialization Javascript in a Function (lets say myinit() ) and fire it on success call back of your load method
Eg
// this line keeps all your function in one global name space and you can extend it multiple times in same document or js files
var myapp = myapp||{};
$(function(){
// Here you are extending your myapp object with custom init function
myapp.init = function(){
//your init code here
}
//your ajax content load here
$('div').load(url,function(){
//Here you call it
myapp.init();
})
})
P.S. you can always test your custom methods in console using myapp.init() anywhere in jQuery exec block

jscript onopen event failing to call function

I want to call a function when the browser opens (or reloads)
If I use:
window.onopen = window.alert("opened");
That works fine however:
window.onopen = winopen;
window.onresize = winopen;
function winopen()
{
alert("opened");
}
Does not. The window.onresize call does work, I'm also using the resize event to call a different function but put it in here just to test whether the function call worked at all as I have the resize event function call working elsewhere.
That's because you're misunderstanding a fundamental thing:
window.onopen = window.alert("opened");
Is assigning window.onopen the result of calling window.alert("opened"), which will call the function regardless.
The second way is the correct way of assigning functions, but there is no such event as onopen.
If you want to call a function on each page load, just call it in your .js file without anything else. The file will be parsed and executed every time the page loads.
So basically, you want:
window.onresize = winopen;
function winopen()
{
alert("opened");
}
winopen(); //Call it now.
In some cases, you may want for the DOM to finish loading (all HTML was parsed, browser is ready for DOM manipulation), in that case, you can use window.onload instead of window.onopen in your example.

Ajax .load() won't work when triggered initially

So I have a simple tab system which I handle with the .load function to load the desired content. The problem is that the page itself which contains this tab system is a ajax loaded content. And for some reason the initial call of the tab function to display the initial tab content won't work. But after manually choosing a tab, the load function loads the content properly.
her some code to look at:
The tab handler:
function loadTab(tab) {
$(".tab_a:eq("+otab+")").removeClass("tab_slc");
$('#tab_content').hide();
$('#tab_content').load("include/tab_downloadVersions.html .tab:eq("+tab+")");
$(".tab_a:eq("+tab+")").addClass("tab_slc");
$('#tab_content').fadeIn(function() {});
otab = tab;
}
at the end I call loadTab(tab); and the thing should be initialized. but for some reason the content remains empty. As soon as you manually click on a tab (I have an on click function which calls loadTab(tab) everything starts working)
Because the code by itself works, I think the problem is caused by the other script which handles the page itself. It is also a .load function which loads the page, which loads this tab system.
So do multiple .loads don't like each other? and if so, what can I change?
Thanks in advance ;)
EDIT: I could't post the entire code for some reason, but if you go here you can see the site in action with all the scripts:
n.ethz.ch/student/lukal/paint.net
The tab system is on the download page.
EDIT:-----------------------------------------------------------------------------------------------------------------------------
Big Update
So this is still the same issue but with a slight twist: I did what was recommended in the comments and put my secondary .load() call inside the success call of the first one.
$("#content").load("pages/contact #contentInside", function() {
$("#OtherContent").load("include/info #OtherContentInside");
});
So this works.
But now I had the great idea to make a giant load function. It is a slightly better function than just the plain load, cause it does some fading and stuff. But now I have the same problem, but even more complicated. I created the load function as a "plugin" so the function itself is in a different script file and therefore I can't access the inside of the success function. I solved this problem with a return $.ajax(); and a .done() call. The problem here is that there is some rare case where it just skips the secondary load function. So I am searching for a guaranteed way of controlling the order of the .load calls. Any idea?
The mock-up website is up to date with the new scripts if you wish to take a look. And people were complaining about potential virus spread from my link. For some reason I can't post long code snippets so the site is the best source I got to show everything. If you know a more trustworthy way to share my code please let me know.
We cannot see the rest of your code to tell where the initial call is being invoked from. A set up like the following should work:
$(function() {
var tab = 0;
loadTab( tab );
});
function loadTab(tab) {
//WHAT IS otab???
$(".tab_a:eq("+otab+")").removeClass("tab_slc"); //<<<==== otab
$('#tab_content').hide();
$('#tab_content').load("include/tab_downloadVersions.html .tab:eq("+tab+")");
$(".tab_a:eq("+tab+")").addClass("tab_slc");
$('#tab_content').fadeIn(function() {});
otab = tab;
}
Update
The reason it does not work initial is because otab is not defined the first time the function is called. You have initialized otab at the end of the function but you are using it at the beginning of the function.
UPDATE 2
I have had a chance to look at your code and I just found out what the issues are:
You do not have DOM ready
You are not calling the function on page load.
The following version of your code should work -- try not to use global variable as you're doing with otab. Since you're loading this script at the end of the page (an you are using event delegation) you may get away with DOM ready. Adding .trigger('click') or click() as indicated below should resolve the issue.
//Tab-loader
//Haeri Studios
var tab = 0;
var otab = tab;
var counter = 0;
//click detect
$(document).on('click', '.tab_a', function() {
tab = counter == 0 ? tab : ($(this).attr('id'));
loadTab(tab);
counter++;
return false;
})
.trigger('click'); //<<<<<===== This will call the function when the page loads
//Tab setup
function loadTab(tab) {
//Content Setup
$(".tab_a:eq("+otab+")").removeClass("tab_slc");
$('#tab_content').hide();
$('#tab_content').load("include/tab_downloadVersions.html .tab:eq("+tab+")");
$(".tab_a:eq("+tab+")").addClass("tab_slc");
$('#tab_content').fadeIn(function() {});
otab = tab;
}
//Initialize << WHAT ARE YOUR INTENTIONS HERE .. DO YOU REALLY NEED THIS PIECE?
$.ajax({success: function() {
loadTab(tab);
}});
A partial answer to this problem was to call the loadTab function inside the success call of the page load function, like charlietfl pointed out. But the problem is that there is no need to call the tabloader every time a new page gets called. So I would rather not have a rare call in every page setup function.
I am a bit disappointed by the system on stackoverflow. It seems like if you have not a high reputation level, no one gives a "S" about your questions. Well but at least some input was give, for which I am very thankful.
So by digging deeper into google I found out that the callback can be manually placed in the function where ever you like.
so if we have a function:
foo(lol, function() {
//This after
});
this does stuff after foo() is done. But what if we have another function inside foo() which we also need to wait for:
function foo(lol) {
bar(troll, function() {
//This first
});
}
The bar function is not relevant to the success call of foo. This causes the unpredictable outcome of calls.
The trick is to control when the success function of foo gets called.
If we add a parameter(callback) inside foo and call this "parameter" (callback();) inside the success call of bar, we can make sure the order is guaranteed.
And that's it:
function foo(lol, callback) {
bar(troll, function() {
//This first
callback(); //<-This callback placement defines when it should be triggered
});
}
foo(lol, function() {
//This after
});
We get:
//this first
//this after

What's the best way to switch between two divs with fading?

I call those functions on href:
function LoadDiv1() {
var uri = '#this.Routes().Parts.Div1.FullUrl(Model.SignedInUser.User.Id)';
$('#home_content').load(uri).css("display", "none").fadeIn(500);
}
function LoadDiv2() {
var uri = '#this.Routes().Parts.Div2.FullUrl(Model.SignedInUser.User.Id)';
uri = uri.replace('amp;', '');
$('#home_content').load(uri).css("display", "none").fadeIn(500);
}
They switch correctly, but every time i switch to another div, first of all i get current div loaded again, and then switched to another. It looks like delay.
You're making an asynchronous call to the server but the methods in the chain are executed immediately. The div's contents are updated only later when the data has been loaded from the server. You must add the fadein method to the callback function of the Ajax call so that it executes only after the contents have been updated.
$('#home_content').css("display", "none").load( uri,
function() { $( '#home_content' ).fadeIn(500) } );

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