I would like to replace the default action of an click event for all anchors in a webpage.
When I use this piece of code:
<html> <head> <script>
var list=document.getElementsByTagName("a");
var isChecked = false;
function load () {
for (i=0; i<list.length; i++)
{
var old = (list[i].onclick) ? list[i].onclick : function () {};
list[i].onclick = function () {
if( !isChecked)
{
test();
old();
}
else
old();
};
}
}
function test() {
alert("new action");
isChecked = true;
}
</script> </head>
<body onload="load();">
<a id="nr_1" onClick="alert('test');"> Anchor 1 </A>
<a id="nr_2" onClick="alert('test2');"> Anchor 2 </A>
</body> </html>
When I click an anchor I get the alert out of the test function and then the default function of the second anchor (even when I click the first anchor). When I then again click one of the two anchors I always get the Alert from the second anchor.
How do I put the original onclick functions back for each anchor element? When someone has an solution in jquery I would be glad as well.
EDIT
I was succesfull using this code:
function load()
{
$('a').attr('disabled', 'disabled');
$('a').click(function(e){
if($(this).attr('disabled'))
{
alert("new");
e.preventDefault();
$('a').removeAttr("disabled");
this.click();
}
});
}
On loading of the page this function is called giving all anchor elements a "disabled" attribute. After clicking the element the e.preventDefault() function disables the inline onclick function. Then I remove the "disabled" attribute and call the click function of the element again. because now the element doesn't have a "disabled" attribute only the default function is performed. I'm still open for "more elegant" solutions to this problem, but for now I'm a happy camper!
If you use jQuery you can combine a one-time handler with a persistent handler:
Documentation for .one() and .on()
Working Example: http://jsfiddle.net/Q8gmN/
Sample HTML:
<input type="button" id="click" value="click" />
Sample JavaScript:
button.one('click', function () {
console.log('one time function fired');
});
button.on('click', function () {
console.log('persistent function fired');
});
Related
I have this piece of code
window.onload = function () {
$('#btnFilter').click(function (e) {
btnFilter(e);
});
}
The function works on button click but I need that the button is clicked when the page opens. I've tried things like $('#btnFilter').trigger( "click" ); but the button still not clicked on page opening. How can I achieve this thing? I can't just call the function because I get the error "Cannot read property 'currentTarget' of undefined" beacuse I don't give any event as parameter.
function btnFilter(e) {
element = e.currentTarget.parentElement;
//other code
}
You can try like this:
$(document).ready(function(){
$('#btnFilter').trigger('click');
});
$(document).on('click','#btnFilter',function(e){
btnFilter(e);
});
function btnFilter(e)
{
element = e.currentTarget.parentElement;
}
You can change your 'btnFilter' to accept the button instead of the event:
function btnFilter(element) {
element = element.parentElement;
...
}
$(function() {
$("#btnFilter").click(function(e) { btnFilter(this); return false; });
// Pass the button to the filter operation on load
btnFilter($("#btnFilter")[0]);
});
alternatively, accept the parent element directly
$(function() {
$("#btnFilter").click(function(e) { btnFilter(this.parentElement); return false; });
// Pass the button parent to the filter operation on load
btnFilter($("#btnFilter")[0].parentElement);
});
If you use jquery i would keep it coherent and not mix it with vanilla javascript. A Jquery solution is:
$(document).on("click", "#btnFilter", btnFilter);
$(document).ready(function(){$("#btnFilter").click()});
or
$(document).on("click", "#btnFilter", btnFilter);
$(document).ready(btnFilter);
In you solution the error is the event binding: when you bind the event to #btnFilter on page load, the element is not existing yet, so the function cannot be triggered.
jQuery Solution:
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("button").trigger("click");
});
</script>
</head>
<body>
<button onclick="alert('clicked')">Click</button>
</body>
</html>
I was working around with form submissions in html. Please take a look at below code
<form id="form1">
<button id="btn1" onclick="clicked();">Submit</button>
</form>
<script>
$("#btn1").click(function (event) {
alert("event triggered");
if(some_condition == true){
// stop firing onclick method but it always submits the form
event.stopImmediatePropogation(); // not working
event.preventDefault(); // not working
event.stopPropogation(); // not working it's for bubbled events
}
});
function clicked(){ alert("clicked me"); }
</script>
I want to stop clicked() function from firing which is attached to inline onclick attribute. I would like to run my jquery click function and if something goes wrong, I dont want to trigger onclick but it always runs clicked() function. Could any one help me. Any help is greatly appreciated.
The order in which an onxyz handler is called relative to dynamically-attached handlers varies from browser to browser, so your handler may well not run before the original does.
To deal with that, you save and remove the onclick handler:
var btn = $("#btn1");
var clickHandler = btn[0].onclick;
btn[0].onclick = false;
Then, in your handler, if you want that function to be called, you call it:
clickhandler.call(this, event);
Example:
// Get the button
var btn = $("#btn1");
// Save and remove the onclick handler
var clickHandler = btn[0].onclick;
btn[0].onclick = false;
// Hook up your handler
$("#btn1").click(function(event) {
alert("event triggered");
if (!confirm("Allow it?")) {
// Disallowed, don't call it
alert("stopped it");
} else {
// Allowed, call it
clickHandler.call(this, event);
}
});
// The onclick handler
function clicked() {
alert("clicked me");
}
<form id="form1" onsubmit="return false">
<button id="btn1" onclick="clicked();">Submit</button>
</form>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
Try event.stopPropagation()
api docs
if condition is true then remove the 'onclick' attribute
if (some_condition == true) {
$("#btn1").removeAttr('onclick').click(function(event) {
alert("event triggered");
//do something
});
}
function clicked() {
alert("clicked me");
}
I am sharing a quick workaround without knowing why you cannot add logic to stop adding "onclick="clicked();" code which you are saying getting automatically added.
I recommend you hide button with id as "btn1". Add style display:none. You donot need on ready function for this but simply add style attribute to the button btn1 or if that is also not possible directly then use jQuery to do that post document ready.
Read :
How to change css display none or block property using Jquery?
Then add a new button to the form using jQuery with id as "btn2" and add register the btn2 click event as well. DO this after form load.
<form id="form1">
<div id="newbut">
<button id="btn1" onclick="clicked();">Submit</button>
</div>
</form>
jQuery("#newbut").html('<button id="btn2">Submit</button>');
$(document).on('click', '#btn2', function(){
// Your Code
});
Refer below url to how to register click event for new button:
Adding click event for a button created dynamically using jQuery
jquery - Click event not working for dynamically created button
Can't you do the condition check and the clicked() logic in one function? i.e
<script>
function clicked() {
if(some_condition == true){
return;
}
alert("clicked me");
}
</script>
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)
}
I have the below html button which have onclick event
<button onclick="alert('button');" type="button">Button</button>
and the following js:
$('button').on('click', function(){
alert('jquery');
});
After executing some js code by jQuery/Javascript, i want to continue with the button onclick handler e.g: jquery alert first and than button alert.
i tried so many things like "remove attr and append it after executing my code and trigger click (it stuck in loop, we know why :) )" and "off" click. but no luck.
is it possible via jQuery/javascript?
any suggestion much appreciated
Thanks
A little bit tricky. http://jsfiddle.net/tarabyte/t4eAL/
$(function() {
var button = $('#button'),
onclick = button.attr('onclick'); //get onclick value;
onclick = new Function(onclick); //manually convert it to a function (unsafe)
button.attr('onclick', null); //clear onclick
button.click(function() { //bind your own handler
alert('jquery');
onclick.call(this); //call original function
})
});
Though there is a better way to pass params. You can use data attributes.
<button data-param="<%= paramValue %>"...
You can do it this way:
http://jsfiddle.net/8a2FE/
<button type="button" data-jspval="anything">Button</button>
$('button').on('click', function () {
var $this = $(this), //store this so we only need to get it once
dataVal = $this.data('jspval'); //get the value from the data attribute
//this bit will fire from the second click and each additional click
if ($this.hasClass('fired')) {
alert('jquery'+ dataVal);
}
//this will fire on the first click only
else {
alert('button');
$this.addClass('fired'); //this is what will add the class to stop this bit running again
}
});
Create a separate javascript function that contains what you want to do when the button is clicked (i.e. removing the onclick attribute and adding replacement code in its own function).
Then call that function at the end of
$('button').on('click', function(){
alert('jquery');
});
So you'll be left with something like this
function buttonFunction()
{
//Do stuff here
}
$('button').on('click', function()
{
alert('jquery');
buttonFunction();
});
<button type="button">Button</button>
I have one html div on my jsp page, on that i have put one anchor tag, please find code below for that,
<div class="expandable-panel-heading">
<h2>
<a id="ancherComplaint" href="#addComplaint"
onclick="markActiveLink(this);">ABC</a>
</h2>
</div>
js code
$('.expandable-panel-heading:not(#ancherComplaint)').click(function () {
alert('123');
});
function markActiveLink(el) {
alert($(el).attr("id"));
}
here I when I click on div I got alert with 123 message, its fine but when I click on ABC I want message I want to call markActiveLink method.
JSFiddle
what is wrong with my code? please help me out.
The problem was that clicking the anchor still triggered a click in your <div>. That's called "event bubbling".
In fact, there are multiple solutions:
Checking in the DIV click event handler whether the actual target element was the anchor
→ jsFiddle
$('.expandable-panel-heading').click(function (evt) {
if (evt.target.tagName != "A") {
alert('123');
}
// Also possible if conditions:
// - evt.target.id != "ancherComplaint"
// - !$(evt.target).is("#ancherComplaint")
});
$("#ancherComplaint").click(function () {
alert($(this).attr("id"));
});
Stopping the event propagation from the anchor click listener
→ jsFiddle
$("#ancherComplaint").click(function (evt) {
evt.stopPropagation();
alert($(this).attr("id"));
});
As you may have noticed, I have removed the following selector part from my examples:
:not(#ancherComplaint)
This was unnecessary because there is no element with the class .expandable-panel-heading which also have #ancherComplaint as its ID.
I assume that you wanted to suppress the event for the anchor. That cannot work in that manner because both selectors (yours and mine) select the exact same DIV. The selector has no influence on the listener when it is called; it only sets the list of elements to which the listeners should be registered. Since this list is the same in both versions, there exists no difference.
Try this
$('.expandable-panel-heading:not(#ancherComplaint)').click(function () {
alert('123');
});
$('#ancherComplaint').click(function (event) {
alert($(this).attr("id"));
event.stopPropagation()
})
DEMO
Try following :
$('.expandable-panel-heading').click(function (e) {
if(e.target.nodeName == 'A'){
markActiveLink(e.target)
return;
}else{
alert('123');
}
});
function markActiveLink(el) {
alert($(el).attr("id"));
}
Here is the working demo : http://jsfiddle.net/JVrNc/4/
Change your jQuery code with this. It will alert the id of the a.
$('.expandable-panel-heading:not(#ancherComplaint)').click(function () {
markActiveLink();
alert('123');
});
function markActiveLink(el) {
var el = $('a').attr("id")
alert(el);
}
Demo
You need to read up on event bubbling and for sure remove inline event handling if you have jQuery anyway
Test the click on the div and examine the target
Live Demo
$(".expandable-panel-heading").on("click",function (e) {
if (e.target.id =="ancherComplaint") { // or test the tag
e.preventDefault(); // or e.stopPropagation()
markActiveLink(e.target);
}
else alert('123');
});
function markActiveLink(el) {
alert(el.id);
}
I would have used stopPropagation like this:
$('.expandable-panel-heading:not(#ancherComplaint)').click(function () {
alert('123');
});
$('#ancherComplaint').on('click',function(e){
e.stopPropagation();
alert('hiiiiiiiiii');
});
Try out this example, the onclick is still called from your HTML, and event bubbling is stopped.
<div class="expandable-panel-heading">
<h2>
<a id="ancherComplaint" href="#addComplaint" onclick="markActiveLink(this);event.stopPropagation();">ABC</a>
</h2>
</div>
http://jsfiddle.net/NXML7/1/
put your jquery function inside ready function for call click event:
$(document).ready(function() {
$("#ancherComplaint").click(function () {
alert($(this).attr("id"));
});
});
when click on div alert key
$(document).delegate(".searchbtn", "click", function() {
var key=$.trim($('#txtkey').val());
alert(key);
});