Develop Reference

Element calling old action after class change [duplicate]

In my JSP page I added some links:
<a class="applicationdata" href="#" id="1">Organization Data</a>
<a class="applicationdata" href="#" id="2">Business Units</a>
<a class="applicationdata" href="#" id="6">Applications</a>
<a class="applicationdata" href="#" id="15">Data Entity</a>
It has a jQuery function registered for the click event:
$("a.applicationdata").click(function() {
var appid = $(this).attr("id");
$('#gentab a').addClass("tabclick");
$('#gentab a').attr('href', '#datacollector');
});
It will add a class, tabclick to <a> which is inside <li> with id="gentab". It is working fine. Here is my code for the <li>:
<li id="applndata"><a class="tabclick" href="#appdata" target="main">Application Data</a></li>
<li id="gentab">General</li>
Now I have a jQuery click handler for these links
$("a.tabclick").click(function() {
var liId = $(this).parent("li").attr("id");
alert(liId);
});
For the first link it is working fine. It is alerting the <li> id. But for the second <li>, where the class="tabclick" is been added by first jQuery is not working.
I tried $("a.tabclick").live("click", function(), but then the first link click event was also not working.

Since the class is added dynamically, you need to use event delegation to register the event handler
$(document).on('click', "a.tabclick", function() {
var liId = $(this).parent("li").attr("id");
alert(liId);
});

You should use the following:
$('#gentab').on('click', 'a.tabclick', function(event) {
event.preventDefault();
var liId = $(this).closest("li").attr("id");
alert(liId);
});
This will attach your event to any anchors within the #gentab element,
reducing the scope of having to check the whole document element tree and increasing efficiency.

.live() is deprecated.When you want to use for delegated elements then use .on() wiht the following syntax
$(document).on('click', "a.tabclick", function() {
This syntax will work for delegated events
.on()

Based on #Arun P Johny this is how you do it for an input:
<input type="button" class="btEdit" id="myButton1">
This is how I got it in jQuery:
$(document).on('click', "input.btEdit", function () {
var id = this.id;
console.log(id);
});
This will log on the console: myButton1.
As #Arun said you need to add the event dinamically, but in my case you don't need to call the parent first.
UPDATE
Though it would be better to say:
$(document).on('click', "input.btEdit", function () {
var id = $(this).id;
console.log(id);
});
Since this is JQuery's syntax, even though both will work.

on document ready event there is no a tag with class tabclick. so you have to bind click event dynamically when you are adding tabclick class. please this code:
$("a.applicationdata").click(function() {
var appid = $(this).attr("id");
$('#gentab a').addClass("tabclick")
.click(function() {
var liId = $(this).parent("li").attr("id");
alert(liId);
});
$('#gentab a').attr('href', '#datacollector');
});

Here is the another solution as well, the bind method.
$(document).bind('click', ".intro", function() {
var liId = $(this).parent("li").attr("id");
alert(liId);
});
Cheers :)

I Know this is an old topic...but none of the above helped me.
And after searching a lot and trying everything...I came up with this.
First remove the click code out of the $(document).ready part and put it in a separate section.
then put your click code in an $(function(){......}); code.
Like this:
<script>
$(function(){
//your click code
$("a.tabclick").on('click',function() {
//do something
});
});
</script>

How to add an event handler to an element which is rendered on a button click?

I have two links on a page. When I click on the second link, it displays certain fields. I want to write a onkeyup() event handler for one of the fields. I have written the code like this and I'm missing something. Please help.
var inputBox;
$().ready(function() {
//cc_sec is the id of the second link in my page.
$('#cc_sec').click(function(){
inputBox = document.getElementById("{!$Component.pg.pb.cardForm.cardnumber}");
alert(inputBox.id);
//This alert is giving me the ID of the element correctly.
});
//This is not working. inputBox is declared as global variable.
inputBox.onkeyup = function(){
alert(inputBox.value);
document.getElementById('printCardNo').innerHTML = inputBox.value;
}
});
Please point out my mistake. TIA :)
UPDATE:
I can get the element by ID only after clicking the cc_sec link. So I cannot do inputBox = document.getElementById("{!$Component.pg.pb.cardForm.cardnumber}"); in the beginning of the ready function.

use jQuery .on to add eventhandler to dynamically created elements.
$('body').on("keyup","{!$Component.pg.pb.cardForm.cardnumber}",function(){
alert($(this).val());
document.getElementById('printCardNo').innerHTML = $(this).val();
});

You have two options
call document.getElementById in document ready:
var inputBox;
$().ready(function() {
inputBox = document.getElementById("{!$Component.pg.pb.cardForm.cardnumber}");
//cc_sec is the id of the second link in my page.
$('#cc_sec').click(function() {
alert(inputBox.id);
//This alert is giving me the ID of the element correctly.
});
inputBox.onkeyup = function() {
alert(inputBox.value);
document.getElementById('printCardNo').innerHTML = inputBox.value;
};
});
or set onkeyup in click event:
var inputBox;
$().ready(function() {
//cc_sec is the id of the second link in my page.
$('#cc_sec').click(function() {
inputBox = document.getElementById("{!$Component.pg.pb.cardForm.cardnumber}");
alert(inputBox.id);
//This alert is giving me the ID of the element correctly.
inputBox.onkeyup = function() {
alert(inputBox.value);
document.getElementById('printCardNo').innerHTML = inputBox.value;
};
});
});

Jquery on php in div box not working

I have an main php that load a php into a div box via a dropdown list.
The loaded php contains a table. There is jquery in it that does an alert on row clicked.
$(document).ready(function() {
$('#newsTable tr').click(function(){
var clickedId = $(this).children('td:first').text();
alert(clickedId);
});
});
But after it is loaded into the div, the script is not firing

use Event delegation to attach event. Event delegation allows us to attach a single event listener, to a parent element, that will fire for all descendants matching a selector, whether those descendants exist now or are added in the future.
$(document).ready(function() {
$(document).on('click','#newsTable tr',function(){
var clickedId = $(this).children('td:first').text();
alert(clickedId);
});
}); // End

There is something with event delegation. Try using this code :
$('id_Or_Class_container_hold_the_php_data').on('click', 'tr', function(){
var clickedId = $(this).children('td:first').text();
alert(clickedId);
});

replace
(document).ready(function() {
with
$(document).ready(function() {

try this
jQuery(document).ready(function($) {
$('#newsTable tr').click(function(){
var clickedId = $(this).children('td:first').text();
alert(clickedId);
});
});

I think you need to use live query, instead of your click event u can use following.
$('#newsTable tr').on('click',function()

Use below code..i think its working properly.
$(document).ready(function() {
$("#newsTable").on('click','tr',function(){
var clickedId = $(this).children('td:first').text();
alert(clickedId);
});
});

Apply A Function to All Links on Page

i have my all links on page like this :
Example
But Now I Want All Links With Following OnClick Function like this:
<a onclick="show();" href="http://example.com">Example</a>
can any one tell me jquery or javascript code to add above function to all links on body, thanks

Some answers have suggested to use jQuery's click() function. That's alright as long as you don't expect to add new links dynamically using javascript.
This click handler will bind on the <body> element, and fire whenever a <a> element inside it is clicked. The advantage with this over $('a').click(...) is that all <a> tags don't need to be present on page load:
$(function () {
$('body').on('click', 'a', function (event) {
event.preventDefault();
show();
});
});
Fiddle: http://jsfiddle.net/Lubf6gjw/2/
EDIT: Here's how to do it with pure javascript:
document.querySelector('body')
.addEventListener('click', function (event) {
if(event.target.tagName === 'A') {
event.preventDefault();
show();
}
});
http://jsfiddle.net/pymwsgke/1/

$(function(){
$("a").click(function(){
show();
}
});
If you want to prevent the browser from following the href, you can just add a preventDefault call
$(function(){
$("a").click(function(e){
e.preventDefault();
show();
}
});
Note that this will not actually append the onclick= to the <a> tags. If you want to do that, you can do it this way:
$("a").each(function(){
$(this).attr("onclick", $(this).attr("onclick")+";show();");
});

Using pure Js
function show (event) {
event.preventDefault();
// do somethink
}
var anchors = document.querySelectorAll("a");
for(var a = 0; a < anchors.length; a++) {
anchors[a].addEventListener("click",show,false)
}

How to get the id of the element that is clicked on the page

I have this situation. I have a JavaScript function that does some work on document click:
$(document).click(function () {
//---Some work is done---
});
But I also want to check which document element is clicked? So, how can I get the clicked element id anywhere in the whole document?

The element from which the event was originated can be referred using the event's target property
$(document).click(function (e) {
var id = e.target.id
});
Note: this will work only if all elements in your page has an id attribute.
Another approach could be to find the closest element with has an id like
$(document).click(function (e) {
var id = $(e.target).closest('[id]').attr('id');
});

try this
$(document).click(function (e) {
//---Some work is done---
var id = e.target.id;
});
DEMO