Develop Reference

Reset function once you already click it

Hi im new on js and honestly speaking we're just starting learning js on our school. What i want to do is once i already click it it will be reset and remove the class again. "myClass has a display none"
$(function() {
$("body").click(function() {
$(".parela").addClass('myClass');
});
});

You can use toggleclass
$(function() {
$("body").click(function() {
$(".parela").toggleClass('myClass');
});
});

Use toggleClass, so at every click it will be added/removed automatically
$(function() {
$("body").click(function() {
$(".parela").toggleClass('myClass');
});
});

You want to use toggleClass() which will toggle the class on and off depending on the click. note that for the demo below - I created the button that toggles the class on the button click.
Another way of doing it - since the only effect is to hide the element - is just .toggle() which toggles the display state without the use of the added class. The following snippet shows both methods.
$(function() {
$("#toggleButton").click(function() {
$(".parela").toggleClass('myClass');
});
$("#toggleButton2").click(function() {
$(".parela2").toggle();
});
});
.myClass{display:none}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p>Using .toggleClass('myClass')</p>
<button type="button" id="toggleButton">clickMe</button>
<span class="parela"> Visible</span>
<hr/>
<p>Using just .toggle()</p>
<button type="button" id="toggleButton2">clickMe</button>
<span class="parela2"> Visible</span>

You can you use some sort of 'flag' variable to control the state.
You can name it whatever you want and make if statement to make decisions accordingly.
$(function() {
var flag = false;
$("body").click(function() {
if(!flag) {
$(".parela").addClass('myClass');
flag = true;
} else {
$(".parela").removeClass('myClass');
flag = false;
}
});
});

Jquery/Javascript Add class if X class is not exist

I am new here, sorry if I do some mistake with this question.
I have a HTML code.
hit me
with this function i can add class two in class one
$(document).ready(function () {
$('a#foo').click(function(){
$('.one').toggleClass('two');
});
});
but how if I want to add class two if class two is not exist and do other function if class two is exist?
maybe like this,
hit me
i klik hit me and jquery is add class two,
hit me
but when I klick hit me again, class two is not removed and because class is exist, i create other function based on class two is exist.
lets say like this,
i klik hit me
hit me
<div id="blah" class=""*>lorem</div>
then
hit me
<div id="blah" class=""*>lorem</div>
and klik hit me again.
hit me
<div id="foo" class="blah2">lorem</div>
can you give me code or google suggest keyword or link, because I confused what i must search first.
thanks for adv,
sorry for my Grammer, i cant speak/write English well, if any wrong grammer or language please correct me.

Using the hasClass() method and you're examples:
$(document).ready(function () {
$('a#foo').click(function(){
if ($(this).hasClass('two')) {
$('#blah').addClass('blah2');
} else {
$(this).addClass('two');
}
});
});

Use jQuery hasClass method .
$(document).ready(function () {
$('a#foo').click(function(){
if ($(this).hasClass('two')) {
doSomething();
} else {
$('.one').addClass('two');
}
});
});

i'm a little confused as to what exactly you want to do, but I think you need to look into .hasClass() for starters.
$(document).ready(function () {
$('a#foo').click(function(){
if ($('.one').hasClass('two')) {
// do stuff you want to do if element already has class "two"
}
else {
// do stuff if it doesnt already have class "two"
}
});
});

I am guessing at your exact needs, but I hope that my assumptions weren't too far off base.
Given HTML like this:
hit me
<div id="change" class="blah1"></div>
And JS Like this:
$(document).ready(function () {
$('a#foo').click(function(e){
e.preventDefault();
var changeDiv = $('#change');
if ($(this).hasClass('two')) {
changeDiv.addClass('blah2').removeClass('blah1');
changeDiv.html('<p>Blah 2</p>');
} else {
changeDiv.addClass('blah1').removeClass('blah2');
changeDiv.html('<p>Blah 1</p>');
}
$('.one').toggleClass('two');
});
});
You will be able to toggle your link's class and change or update another div based on the class of your link when clicked.
You can see this code working at http://jsfiddle.net/PTdLQ/4/

Another way to look at this is to check if the given class exists in the dom. Therefore, one can use the following:
$(document).ready(function () {
$('a#foo').click(function(){
if ($('.two').length) {
//there is a class two
SomeFunction();
} else {
//there is no class two
SomeOtherFunction();
}
});
});
Hope I typed it right

Use this code:
<script>
$(document).ready(function () {
if(!$('#mydiv').hasClass('myclass')) {
$('#mydiv').addClass('myclass');
}
});
</script>

If jQuery has Class do this action

I am trying to check whether or not a particular element has been clicked but am having trouble doing so. Here is my HTML:
<div id="my_special_id" class="switch switch-small has-switch" data-on="success" data-off="danger">
<div class="switch-on switch-animate"><input type="checkbox" checked="" class="toggle">
<span class="switch-left switch-small switch-success">ON</span>
<label class="switch-small"> </label>
<span class="switch-right switch-small switch-danger">OFF</span>
</div>
</div>
Here is my jQuery:
<script type="text/javascript">
$(document).ready(function() {
$('#my_special_id').click(function() {
if ($('#my_special_id div:first-child').hasClass('switch-on')) {
window.alert('ON!');
}
});
});
</script>
I am guessing that my id "my_special_id" is not what is actually being clicked?

I guess click event should have event parameter.
$(document).ready(function() {
$('#my_special_id').click(function(e) {
if (e.target check condition) {
window.alert('ON!');
}
});
});
parameter 'e' above specified is the event object that has all info about click event.
so if u check all info under 'e.tartget', u will be able to find out which one is clicked.
Hope it's helpful for you.
Cheers :)

Since you are looking for a alert when the checkbox is clicked
$(document).ready(function() {
$('#my_special_id input.toggle').click(function() {
if ($('#my_special_id div:first-child').hasClass('switch-on')) {
window.alert('ON!');
}
});
});
Demo: Fiddle

Simply put alert when you click on that particular class switch-on
<script type="text/javascript">
$(document).ready(function() {
$('#my_special_id div:first-child .switch-on').on('click',function() {
window.alert('ON!');
});
});
</script>
Or even try like
$(document).ready(function() {
$('#my_special_id').click(function() {
if ($(this + 'div:first-child').hasClass('switch-on')) {
window.alert('ON!');
}
});
});

This JavaScript works for me.
$(document).ready(function() {
$('#my_special_id').click(function() {
if ($('#my_special_id div:first-child').hasClass('switch-on')) {
alert("On!");
}
});
});
You are sure you have JQuery?
Your code looks fine I think either you have a syntax error somewhere else or you do not have JQuert.
does this alert?
$(document).ready(function() {
alert("Jquery works");
});

The click event will trigger to whatever you're bound do. the only time you'd have to be worried is if you bound to both a parent and child (e.g. you had listed #my_special_id,.switch-small--then you'd have to look at e.target).
With that said, you can use scope to limit how jQuery finds the div:first-child. I'm not 100% sure what you're after, but the below appears to do what you're after:
$(document).ready(function() {
$('#my_special_id').click(function() {
// look for div:first-child within `this` (where `this=#my_special_id`
// per the .click selector above)
if ($('div:first-child',this).hasClass('switch-on')) {
window.alert('ON!');
}
});
});
If you're looking to bind to the on/off separately, you may want to change it around a bit. we can still check for .switch-on, just have to traverse differently:
// here we bind to the on/off buttons and not the container
$('#my_special_id .switch-small').click(function(){
// you want the facsimilee of `div:first-child`, so (because we're now
// within that node, we use .parent() to get back up to it
var $firstChild = $(this).parent();
if ($parent.hasClass('switch-on')){
alert('ON!');
}
});

javascript functions to show and hide divs

Hello I have the following 2 JavaScript functions to open up a div and to close it.
<script>
function show() {
if(document.getElementById('benefits').style.display=='none') {
document.getElementById('benefits').style.display='block';
}
}
</script>
<script>
function close() {
if(document.getElementById('benefits').style.display=='block') {
document.getElementById('benefits').style.display='none';
}
}
</script>
Here is the html:
<div id="opener"><a href="#1" name="1" onclick=show()>click here</a></div>
<div id="benefits" style="display:none;">
some input in here plus the close button
<div id="upbutton"><a onclick=close()></a></div>
</div>
For some reason the show function works how it should, but the close button does not do its job. So if there is someone who could help me out I really would appreciate. Thanks a lot.

<script>
function show() {
if(document.getElementById('benefits').style.display=='none') {
document.getElementById('benefits').style.display='block';
}
return false;
}
function hide() {
if(document.getElementById('benefits').style.display=='block') {
document.getElementById('benefits').style.display='none';
}
return false;
}
</script>
<div id="opener">click here</div>
<div id="benefits" style="display:none;">some input in here plus the close button
<div id="upbutton"><a onclick="return hide();">click here</a></div>
</div>

I usually do this with classes, that seems to force the browsers to reassess all the styling.
.hiddendiv {display:none;}
.visiblediv {display:block;}
then use;
<script>
function show() {
document.getElementById('benefits').className='visiblediv';
}
function close() {
document.getElementById('benefits').className='hiddendiv';
}
</script>
Note the casing of "className" that trips me up a lot

The beauty of jQuery would allow us to do the following:
$(function()
{
var benefits = $('#benefits');
// this is the show function
$('a[name=1]').click(function()
{
benefits.show();
});
// this is the hide function
$('a', benefits).click(function()
{
benefits.hide();
});
});
Alternatively you could have 1 button toggle the display, like this:
$(function()
{
// this is the show and hide function, all in 1!
$('a[name=1]').click(function()
{
$('#benefits').toggle();
});
});

You need the link inside to be clickable, meaning it needs a href with some content, and also, close() is a built-in function of window, so you need to change the name of the function to avoid a conflict.
<div id="upbutton">click to close</div>
Also if you want a real "button" instead of a link, you should use <input type="button"/> or <button/>.

check this:
click here
<div id="benefits" style="display:none;">some input in here plus the close button
<div id="upbutton"><a onclick="close(); return false;"></a></div>
</div>

Rename the closing function as 'hide', for example and it will work.
function hide() {
if(document.getElementById('benefits').style.display=='block') {
document.getElementById('benefits').style.display='none';
}
}

Close appears to be a reserved word of some sort (Possibly referring to window.close). Changing it to something else appears to resolve the issue.
http://jsfiddle.net/c7gdL/1/

You can zip the two with something like this [like jQuery does]:
function toggleMyDiv() {
if (document.getElementById("myDiv").style.display=="block"){
document.getElementById("myDiv").style.display="none"
}
else{
document.getElementById("myDiv").style.display="block";
}
}
..and use the same function in the two buttons - or generally in the page for both functions.

Jquery anchor tag display problem

I am unable to show an anchor tag to display itself using .show() in Jquery or javascript. Conn Window is visible by default. It hides and displays the div but it is unable to do the same with anchor. I have manually tried to change it in firebug/IE dev tools and it works there. It just doesn't work when I do it with jquery/javascript.
Here is the HTML code:
<div id="connWindow">Conn Window
<div id="closeButton" onclick="javascript:connHide();"></div>
</div>
Here is the jquery code:
function connHide()
{
$('#connTab').show();
$('#connWindow').hide();
}
function connShow()
{
$('#connWindow').show();
$('#connTab').hide();
}
Any help will be greatly appreciated!

Why not bind your click events in jQuery as well
function connHide()
{
$('#connTab').show();
$('#connWindow').hide();
}
function connShow()
{
$('#connWindow').show();
$('#connTab').hide();
}
$(document).ready(function () {
$("#contab").click(function () {
connShow();
return false;
});
$("#connWindow").click(function() {
connHide();
});
});

The inline CSS display:none is overriding the mechanism jQuery uses to show and hide.
Hide the anchor programmatically instead:
HTML:
<div id="connWindow">
Conn Window
<div id="closeButton"></div>
</div>
Script:
$(function() { // on document load
$('#connTab').css('display', 'none');
// I'm going to replace your inline JS with event handlers here:
$('#connTab').click(function() { connShow(); return false; });
$('#closeButton').click(function() { connHide(); });
});
function connHide() {
$('#connTab').css('display', '');
$('#connWindow').css('display', 'none');
}
function connShow() {
$('#connWindow').css('display', '');
$('#connTab').css('display', 'none');
}
Hope that helps.

You don't need to state javascript: for onclick events. Try changing to:
<div id="closeButton" onclick="connHide();"></div>
I would also change the first line to the following: