In my project i have used master page.In one particular page , i want a function to be executed on page unload(javascript event) event of that particular page.To achieve this i have written
$('body').bind('unload',function()
{
alert('hello');
} );
But this is not working.This function is not getting called when i move to other page.
How should i achieve this.
Well, I suppose its a problem when writing the question but your code should be:
$(window).bind('unload',function()
{
alert('hello');
});
You are missing the ending ); and the event should be bound to the window...
[Edit: Added the bind to the window instead of 'body']
$(window).bind("unload", function(){
alert(123);
});
worked for me :)
$(document).ready(function(){
$(window).unload( function () {
alert("Bye now!");
} );
});
try this. the document.ready function runs on pageload. so your bind will execute and is should work.
Related
I have a DIV that is in an .html file that is loaded into my document via:
$(document).Ready( function() {
$("#contentDiv").load("some.html")
//some.html contains a button id=saveButton
$("#saveButton").click( function () {
alert("Here I am!");
}
});
The event will not fire. If I cut the content of some.html and put it in the document, uhm, "physically", the event will fire.
So, I am pretty sure this issue is related to the fact that the html is injected via .load().
It's bothersome, because if you look at the page source, all the HTML is in fact there, including the button.
So, the question is, is there ANY way to make this work? I am using .load() to reduce page complexity and increase readability, and, code-folding notwithstanding, I really do not want to have to pull all this HTML into the document.
EDIT: This code was just typed in off the cuff. It's not a cut-n-past of the actual code, and it is just to demonstrate what the problem is. But, thanks for pointing it out.
EDIT2: Grrrrrrr. });
load() is asynchronus so you need to the job in the callback :
$(document).ready(function() {
$("#contentDiv").load("some.html", function(){
//some.html contains a button id=saveButton
$("#saveButton").click( function () {
alert("Here I am!");
});
});
});
Hope it helps :)
one way is by adding to the some.html the script line which will be loaded as the div appears.
You can add this script to some.html(in a script tag):
registerButton();
and then you can define registerButton() in your current document.
other way, if I remember correctly is by using something like the function bind( )
If you want to fire event on element which was not available at the time when DOM was ready then you need to use .on event.
http://api.jquery.com/on/
$("#saveButton").on("click", function() {
alert("Here I am!");
});
jquery load() function is asynchronous. If you want to bind events to the loaded content, you should put the code into the callback function:
$(document).ready(function() {
$("#contentDiv").load("some.html", function() {
//you should put here your event handler
});
});
Your issue is that jquery load() function is asynchronous as #lucas mention. But his code has syntax errors, try this:
$(document).ready(function () {
$("#contentDiv").load("some.html", function () {
$("#saveButton").click(function () {
alert("Here I am!");
});
});
});
Hope it helps now
You need to bind the event handler either after the load OR to the container of the HTML from the load
$(document).ready(function() {
$("#contentDiv").load("some.html", function() {
$("#saveButton").on('click',function() {
alert("Here I am! Bound in callback");
});
});
});
OR use: (not needed that it be in the document ready just that the contentDiv be present)
$("#contentDiv").on('click','#saveButton',function(){
alert("Here I am! bound to container div");
});
EDIT: load on the SAVE button click (per comments) (this makes no sense though)
$(document).ready(function() {
$("#saveButton").on('click',function() {
$("#contentDiv").load("some.html", function() {
alert("Here I am! Bound in callback");
});
});
});
Trying to call a function, by testing it I tried to do 'alert' but perhaps 1.11 doesn't support that but it's not working even when I test it in things that I know work. So doing a simple $('body').hide() in the function to see if it's called, and it's not for some reason. Probably syntax error, new to web programming. Any help is appreciated. My guess is that it's not in the document ready function, so if that's correct how do i work around it?
$(document).ready(function() {
$('a.show').click(function(){
testFunc();
}); //closes click
}); //closes ready
function testFunc()
{
$('body').hide();
});
You need to remove the ); after the testFunc definition.
function testFunc()
{
$('body').hide();
}
See Fiddle
For future reference, when debugging javascript the first place to look is the console.
You may also need to prevent the default linking action for the anchor with preventDefault();.
$(document).ready(function() {
$('a.show').click(function(event){
event.preventDefault();
testFunc();
}); //closes click
}); //closes ready
if you dont provide any error details i assume that you should put it in that order :
function testFunc()
{
$('body').hide();
};
$(document).ready(function() {
$('a.show').click(function(){
testFunc();
}); //closes click
}); //closes ready
I am new to Js and Ajax. I am calling a page through ajax (using jquery). the called page has a button. On button click, i need an alert box. But the event listner is not acting on the button click.
function setUpClickHandler() {
addEventHandler(document.getElementById('sideLink1'), "click", onsideLinkClicked1, false);
addEventHandler(document.getElementById('EnrollButtonClick11'), "click", onEnrollButtonClick11, false);
}
function onsideLinkClicked1(e) {
$('#CrousalLoad').load('crousal1.html');
}
function onEnrollButtonClick11(e) {
alert("hello");
}
crousal1.html is the loaded page and "EnrollButtonClick11" is the button id inside the page. Is there anything I am missing here. Plz add comments for any clarifications as I am struck here. Thanks in advance.. :)
if your using jQuery you can skip that in just do this.
$("#sideLink1").click(function (){
alert('hello');//you do it directly in the function
onEnrollButtonClick11(); //or call a function from here.
})
Source:
http://api.jquery.com/click/
says the same thing.
This probably happens because the button you are registering a click to with the id of EnrollButtonClick11 doesn't exist on the page at that moment. Since you are using jQuery try something like $('body').on('click', 'EnrollButtonClick11', onEnrollButtonClick11);
In my application I am using a simple JavaScript popup and successfully invoking it this way-
<a href="javascript:popup('Hello World')>Click Me</a>
I was wondering whether it is possible to invoke the same popup on other jQuery events. For instance
$("#some_button_id").click( function() {
javascript:popup('Hello World');
});
The above method doesn't work. Any other solution?
EDIT - You don't need the javascript: part because you are not attaching javascript inline.
But that is not the cause of the error so make sure that you wait until the DOM is ready before attaching an event handler.
$(function(){
var popup = function(msg){
alert(msg);
}
$("#some_button_id").click( function() {
popup('Hello World');
});
});
and of course make sure you define popup() somewhere
If the popup function is defined on your page then you should use
$("#some_button_id").click( function() {
popup('Hello World');
});
The javascript: prefix is only needed when you use javascript code directly inside your html attributes.
$("#some_button_id").click( function() {
popup('Hello World');
});
should work.
EDIT
this will work for sure if the id exit when the event if fired , wether or not it has been created when the the listener was added , it is called delegation :
$(document.body).click( function(e) {
if(e.target.getAttribute("id")=="some_button_id"){
popup('Hello World');
}
});
I wrote a little pager which removes and rewrites content. I have a function called after loading the page, it shall be executed after changing the page as well. Because I do not wat to implement the function twice (on initialisation and after changing the page) I tried bind()/live() and a simple function.
The function looks like this:
jQuery('.blogentry').each(function (){
jQuery(this).click(function(){
//Clicking on the element opens a layer, definitely works - I tested it
});
});
It is executed after initialisation, for executing it after page changes as well I tried the following:
jQuery('.nextPage, .prevPage').click(function changePage(){
// Changing page and rewriting content
showEntry();
});
//...
showEntry();
//...
function showEntry(){
jQuery('.blogentry').each(function (){
jQuery(this).click(function(){
//Clicking on the element opens a layer, definitely works - I tested it
});
});
}
But the function is not executed if put inside a function (lol) and called via showEntry();
Afterwards I tried to bind the function...
jQuery('.nextPage, .prevPage').click(function changePage(){
// Changing page and rewriting content
jQuery('.blogentry').bind("click", showEntry);
});
//...
jQuery(this).click(function showEntry(){
//Clicking on the element opens a layer, definitely works - I tested it
});
Did not work either. Code after the bind()-line would not execute as well.
I thought maybe it's a problem to bind to an event function, if an event is already given via the parameter so i also tried this:
jQuery('.nextPage, .prevPage').click(function changePage(){
// Changing page and rewriting content
jQuery('.blogentry').bind("click", showEntry);
});
//...
function showEntry(){
//Clicking on the element opens a layer, definitely works - I tested it
});
}
No success at all. Maybe I cannot call the function from inside the function regarding to the bind()? Maybe I just do not understand the bind()-function at all? I also tried the live() function since it seemed to fit better, as I am rewriting the content all the time. But it had the same effect: none...
The simplest way to implement this should be
jQuery('.blogentry').live('click', function() { /* onclick handler */ });
This should bind the function to every blogentry on the page at the moment of the call and all the blogentries that are added to the page later on.
Additional notes:
In $(foo).each(function() { $(this).click(fun); }); the each is unnecessary - $(foo).click(fun); is enough.
$(foo).bind('click', fun); is functionally equivalent to $(foo).click(fun) - it does not matter which one you use.
You can use delegate or bind. don't call the function like that, just create a delegate with .blogentry and it should update even after you load a new page via ajax. It will automatically do this.
$("#blogcontainer").delegate(".blogentry", "click", function(){ //open layer });
This should work for you
$(body).delegate(".blogentry", "click", function(){
showEntry();
});
alternaltivly you can use event delegation
$(document).ready(function () {
$('#blogcontainer').click( function(e) {
if ( $(e.target).is('.blogentry') ) {
// do your stuff
}
});
});
hence, no need to bind each blogentry at creation or reload, and it's (slightly) faster.