Is it possible to make sure jQuery on click event executes before the user is forwarded to the external URL? I have been googling now for 2 hours and read a couple of posts here on stackoverflow. I just cant get this to work.
This is what I've tried:
HTML:
Click me
JS:
$('.external-url').on("click", function (e) {
e.preventDefault();
if (myCustomEvent()) {
window.location = this.href;
}
});
function myCustomEvent()
{
setTimeout(function() {
console.log('Execute some custom JS here before a href firing...');
return true;
}, 3000);
}
But it seems like the line "if (myCustomEvent()) {" is exectuted before myCustomEvent function is able to return true. Is there a better way to do this? And a way that actually works?
The jQuery click event does run before the location changes--but you're doing something async in the middle of the click handler.
The easiest thing to do would be to pass in what you want to have happen into myCustomEvent, roughly:
$('.external-url').on('click', function (e) {
const url = this.href
e.preventDefault()
myCustomEvent(function() {
window.location = url
});
});
function myCustomEvent(fn) {
setTimeout(function() {
console.log('Execute custom JS before firing navigation...');
fn();
}, 3000);
}
There are other ways to handle this depending on your actual requirements.
Related
I use a jQuery window libray https://github.com/humaan/Modaal
which triggers events this way $("class of element").modaal({arg1, arg2,...});
--- I updated my question here to make it more general and used an iframe / Html instead of an external svg ---
To trigger an element e.g. in an external Html which is loaded within an iframe, I applied the following code to the iframe:
<iframe src="External.html" id="mainContent" onload="access()"></iframe>
which calls this function:
function access() {
var html = document.getElementById("mainContent").contentDocument.getElementById("IDofDIVelement");
html.addEventListener('click', function() {clicker();});
}
function clicker()
{
// console.log('hooray!');
$("#mainContent").contents().find("IDofDIVelement").modaal({});
//return false;
}
Actually it will only work on every second click. Any idea what I did not consider properly?
Best
You do not need to wait windows loading but iframe only:
$(function() {
$("#mainContent").bind("load",function(){
var myIframeElement = $(this).contents().find(".modaal");
myIframeElement.modaal({
content_source: '#iframe-content',
type: 'inline',
});
});
});
The reason why it did not work was that the iframe was not completely loaded, while jQuery tried to attach the function. As $(document).ready(function(){} did not work, the workaround was to initialize it with
$( window ).on( "load",function() {
$("#mainContent").contents().find("IDofDIVelement").modaal({});
});
This worked properly to attach the functionallity to an element within the iframe.
Actually modaal will vanish the envent handler after the overlay was opened and closed again.
So maybe someone wants to trigger an iframe element for modaal, too, here is a setup which would solve this issue.
(It can be optimised by #SvenLiivaks answer):
$(window).on("load", function() {
reload();
});
function reload() {
var length = $("#iframeID").contents().find("#IDofDIVelement").length;
// The following check will return 1, as the iframe exists.
if (length == 0) {
setTimeout(function() { reload() }, 500);
} else {
$("#iframeID").contents().find("#IDofDIVelement").modaal({
content_source: '#modalwrapper',
overlay_close: true,
after_close: function reattach() {
reload();
}
});
}
}
I'm trying to create a simple click catcher where if you click .image-class the javascript will take the href from another element with a class name of .btn and send you to it's destination. Though I keep getting errors on lines 7 & 10 saying that undefined is not a function. How do I make this work?
<script>
var ClickCatcher=
{
init:function(){
var link = jQuery('.btn')[1].href;
var imgCatch = jQuery('.image-class');
imgCatch.addEventListener("click", ClickCatcher.clickListener, false);
},
clickListener:function(){
window.location = link;
}
};
ClickCatcher.init();
</script>
You can do this with jquery with a simple click event
jQuery('.image-class').on('click', function (){
window.location = jQuery('.btn').eq(1).attr('href');
});
But if you still want to write in the way you have you can do:
var ClickCatcher = {
init: function () {
jQuery('.image-class').on('click', function (){
window.location = jQuery('.btn').eq(1).attr('href');
});
}
};
ClickCatcher.init();
Just make sure to fire the init method after dom load.
update: One issue with it is that you have coded your target etc in the code rather then pass it, so its going to be hard to reuse, you'd be better off doing:
var ClickCatcher = {
init: function ($button, loc) {
$button.on('click', function (){
window.location = loc;
});
}
};
ClickCatcher.init(jQuery('.image-class'), jQuery('.btn').eq(1).attr('href'));
That way the internal working is seperate from the dom (as you are passing the dom dependencies to the function.
#atmd showed a very good way of doing this. If you just want to know what your mistake was though. It is wa an error in your jQuery stament to get the btn href
jQuery('.btn')[1].href
you need to call the attr function and then get the href attr. and use .eq(1) to reduce the set to the first btn
jQuery('.btn').eq(1).attr('href);
I Want to Show Loading Image during post back.
When submit event occur it's OK but i want to show for all post back
event.
Problem is I need to check post back occur or not before post back
to server.
jQuery
$("#form1").live("submit", function () {
$('#dvLoading').fadeIn(2000);
});
$("#form1").live("click", function () {
if( **// here I need to check postback occur or not before postback**) {
$('#dvLoading').fadeIn(2000);
}
});
$(document).ready(function () {
$('#dvLoading').hide();
});
HTML
<div id="dvLoading">
<img src="Styles/images/Processing.jpg" />
</div>
From what I understand, you want to check if the postback has already occurred in your 'click' handler. You could do this by defining a variable to check if the postback has already occurred.
var postbackCalled = false;
$("#form1").live("submit", function () {
$('#dvLoading').fadeIn(2000);
postbackCalled = true;
});
$("#form1").live("click", function () {
if(!postbackCalled) {
$('#dvLoading').fadeIn(2000);
}
});
I have a small problem that should be very easy to overcome. For some reason I cant work this out. So the problem is I cannot get a button to link to some jquery. My set-up is as follows (showing the relevant code):
Default.aspx
jQuery:
function getContent() {
var data = {
numberID: 1
};
$.jsonAspNet("ContentService.asmx", "GetContent", data,
function (result) {
$('#content').html(result);
});
}
jQuery(document).ready(function () {
getContent();
});
HTML:
<div id="content"></div>
ContentService.vb
<WebMethod()> _
Public Function GetContent(number As Integer) As String
Dim sb = New StringBuilder
sb.AppendLine("<table>")
sb.AppendLine("<tr>")
sb.AppendLine("<td class='ui-widget-header ui-corner-all'>Number</td>")
sb.AppendLine("</tr>")
sb.AppendLine("<tr>")
sb.AppendLine("<td>" & number & "</td>")
sb.AppendLine("<td><a href='#' id='test' class='fg-button ui-state-default ui-corner-all'><img src='" & Context.Request.ApplicationPath & "/images/spacer.gif' class='ui-icon ui-icon-pencil' /></a></td>")
sb.AppendLine("</tr>")
sb.AppendLine("</table>")
Return sb.ToString
End Function
So that's the basics of what I have everything works but I'm not sure how to get the a button (id='test') to get linked to some jQuery. I want it to be pressed and bring up a popup.
I have tried to put the jQuery on default.aspx but this doesn't seem to work unless the button is place in the HTML on that page.
$('#test').unbind('click').click(function () {
alert('Working');
});
I'm sure this is easy to do, but I have been trying for a while and cannot seem to get it to work.
Is the problem that you're trying to bind to the element that ISN'T in existance yet?
are you calling the $('#test').unbind('click').click(function () {
alert('Working');
}); BEFORE the service has returned?
$('#test').on('click', function () {
alert('Working');
});
This will bind the event to the '#test' element once it has been inserted in to the DOM.
As you load the content via ajax, you have to bind to $('#content'). Like this:
$(function () {
$('#content').on('click', '#test', function () {
e.preventDefault(); // if a default action is not needed needed
alert('Working');
});
});
I guess this is about not preventing the default behaviour of the A href tag. Now it will probably link to '#' instead of firing the onclick event.
$('#test').on('click', function (e) {
alert('Working');
e.preventDefault();
});
You could try to wrap this in a document ready, or eventually use the .on binder from jQuery, since it's dynamic content.
Solved
It was a very small thing that caused this. The code to fix this problem is as follows:
$('#test').unbind('click').click(test);
This needed to go inside the function with the json so:
function getContent() {
var data = {
numberID: 1
};
$.jsonAspNet("ContentService.asmx", "GetContent", data,
function (result) {
$('#content').html(result);
$('#test').unbind('click').click(test);
});
}
Thank you to everyone that has tried to help me.
I am trying to delay the default event or events in a jQuery script. The context is that I want to display a message to users when they perform certain actions (click primarily) for a few seconds before the default action fires.
Pseudo-code:
- User clicks link/button/element
- User gets a popup message stating 'You are leaving site'
- Message remains on screen for X milliseconds
- Default action (can be other than href link too) fires
So far, my attempts look like this:
$(document).ready(function() {
var orgE = $("a").click();
$("a").click(function(event) {
var orgEvent = event;
event.preventDefault();
// Do stuff
doStuff(this);
setTimeout(function() {
// Hide message
hideMessage();
$(this).trigger(orgEvent);
}, 1000);
});
});
Of course, this doesn't work as expected, but may show what I'm trying to do.
I am unable to use plugins as ths is a hosted environment with no online access.
Any ideas?
I would probably do something like this.
$("a").click(function(event) {
event.preventDefault();
doStuff(this);
var url = $(this).attr("href");
setTimeout(function() {
hideMessage();
window.location = url;
}, 1000);
});
I'm not sure if url can be seen from inside the timed function. If not, you may need to declare it outside the click handler.
Edit: If you need to trigger the event from the timed function, you could use something similar to what karim79 suggested, although I'd make a few changes.
$(document).ready(function() {
var slept = false;
$("a").click(function(event) {
if(!slept) {
event.preventDefault();
doStuff(this);
var $element = $(this);
// allows us to access this object from inside the function
setTimeout(function() {
hideMessage();
slept = true;
$element.click(); //triggers the click event with slept = true
}, 1000);
// if we triggered the click event here, it would loop through
// this function recursively until slept was false. we don't want that.
} else {
slept = false; //re-initialize
}
});
});
Edit: After some testing and research, I'm not sure that it's actually possible to trigger the original click event of an <a> element. It appears to be possible for any element other than <a>.
Something like this should do the trick. Add a new class (presumably with a more sensible name than the one I've chosen) to all the links you want to be affected. Remove that class when you've shown your popup, so when you call .click() again your code will no longer run, and the default behavior will occur.
$("a").addClass("fancy-schmancy-popup-thing-not-yet-shown").click(function() {
if ($(this).hasClass("fancy-schmancy-popup-thing-not-yet-shown"))
return true;
doStuff();
$(this).removeClass("fancy-schmancy-popup-thing-not-yet-shown");
var link = this;
setTimeout(function() {
hideMessage();
$(link).click().addClass("fancy-schmancy-popup-thing-not-yet-shown";
}, 1000);
return false;
});
Probably the best way to do this is to use unbind. Something like:
$(document).ready(function() {
$("a").click(function(event) {
event.preventDefault();
// Do stuff
this.unbind(event).click();
});
})
This might work:
$(document).ready(function() {
$("a").click(function(event) {
event.preventDefault();
doStuff(this);
setTimeout(function() {
hideMessage();
$(this).click();
}, 1000);
});
});
Note: totally untested