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can multiple click events be used on the same element?

$("#button1").click(function(e)
{
//action
});
$("#button2").click(function(e)
{
//do something
$("#button1").click(function(f)
{
//do something else
});
});
I have two buttons doing different actions.but if button 2 is clicked,i need button 1 to do a different task on the next click without the first function being executed.
any suggestions?

For that ,you need to use one variable scope for detect whether button 1 or 2 is click
var btn = 1; // default
$("#button1").click(function(e)
{
if(btn){
#button1 click
}
else{
#after button2 click
}
});
$("#button2").click(function(e)
{
btn = 2; //change value after button2 click
});

I suggest you look into jQuery's .on() and .off() capabilities.
http://api.jquery.com/on/
http://api.jquery.com/off/
As it says in the 'off' link above, you can create namespaces for your click events, so you can add and remove just the particular on and off events you like. Something like this:
$("#button1").on("click.myName", function(e){
//action
});
$("#button2").click(function(e){
//do something
$("#button1").off("click.myName").on("click.myOtherName", function(e) {
//do something else
});
});
This allows you to target your click events more directly, and not call .off() generically, wiping out all click events.

One method you could use is by unbinding any event listener before adding a new event listener to the button you want to change.
This can be done with the on() and off() functions in Jquery.
$("#button1").off('click').on('click',function(e)
{
//action
});
You can then do the same thing with button 2...
$("#button2").off('click').on('click',function(e)
{
//action
$("#button1").off('click').on('click',function(e)
{
//action
});
});
By doing this, the last on click that you set is the only one that will occur when you click that element.

You may try this once
$("#button1").click(function(e)
{
//action
});
$("#button2").click(function(e)
{
//do something
$("#button1").unbind();
$("#button1").bind('click', function(f)
{
//do something else
});
});
I hope this would work for you.

OR condition for running function

I have button (".moreAlertsBtn") that run function when user click on it
I would like to run the same function if user click on another button that contain the id "#alertsBtn"
how do I add OR condition?
$(document).on('click','.moreAlertsBtn',function() { }
also - inside the function, can i add contision if user click on the first button and another if he click on the second?

Just separate them using comma(,) like this:
$(document).on('click','.moreAlertsBtn, #alertsBtn',function() { });
can i add condition if user click on the first button and another if
he click on the second?
$(document)
.on('click','.moreAlertsBtn, #alertsBtn',function() {
if($(this).hasClass('moreAlertsBtn')) {
//.moreAlertsBtn clicked
} else {
//#alertsBtn clicked
}
});

how do I add OR condition?
You can use the comma, which in CSS is "or" (but keep reading):
$(document).on('click','.moreAlertsBtn, #alertsBtn',function() { });
But:
also - inside the function, can i add contision if user click on the first button and another if he click on the second?
If you're going to do that, then it makes more sense to use separate handlers:
$(document).on('click','.moreAlertsBtn',function() { });
$(document).on('click','#alertsBtn',function() { });
But answering the question, yes, you can tell like this:
if (this.id === "alertsBtn") {
// It's #alertsBtn
} else {
// Must be .moreAlertsBtn
}
E.g.:
$(document).on('click','.moreAlertsBtn, #alertsBtn',function() {
if (this.id === "alertsBtn") {
// It's #alertsBtn
} else {
// Must be .moreAlertsBtn
}
});
That works because jQuery will call your handler with this referring to the DOM element you "hooked" the event on (even when you're actually doing delegation, as you are in your examples).

You can use comma in-between selectors as follows :
$(document).on('click','.moreAlertsBtn,#alertsBtn',function() { }

Temporarily ignore click event in Meteor Template

I want to temporarily ignore any click events on a button #firstBtn for 5 seconsd after it has been clicked on.
Template.sidebar.events({
'click #firstBtn': function () {
//...
}
})
How can this be done? Looked into
$('#firstBtn').unbind('click', eventHandler)
Meteor.setTimeout(function(){
$('#firstBtn').bind('click', eventHandler)
}, 5000)
but how should we refer to the click event handler in template sidebar?

Try something like this:
First, initialize a variable to set the timeout, and a variable to say if the button has been clicked. This is needed for the conditional statement.
var timeout = 5000; //5000 milliseconds is equal to 5 seconds
var isClickable = true;
Then, Try some conditional testing like this:
$('#firstBtn').click(function(){
if(isClickable){
...
//standard link handling code
...
isClickable = false;
setTimeout(function(){isClickable = true;},timeout)
}else{
return;
}
});
This will only allow the click event's handling code to execute if the timeout is comeplete.
Good Luck!

How Store and Disable Event of another element Temporary

I am looking for a way to manage the events. I have a hover function for element A, and click function for element B. I want to disable A`s hover function temporary while the second click of B.
I am looking for a way that not necessary to rewrite the hole function of A inside of B. Something very simply just like "Store and Disable Event, Call Stored Function"
I found some technique like .data('events') and console.log. I tired but failed, or maybe I wrote them in a wrong way.
Please help and advice!
$(A).hover();
$(b).click(
if($.hasData($(A)[0])){ // if A has event,
//STORE all the event A has, and disable
}else{
//ENABLE the stored event for A
}
);

Try this
var hoverme = function() {
alert('Hover Event Fired');
};
$('.A').hover(hoverme);
var i = 0;
$('.B').on('click', function(){
if(i%2 === 0){
// Unbind event
$('.A').off('hover');
}
else{
// Else bind the event
$('.A').hover(hoverme);
}
i++;
});
Check Fiddle

I think that what you want to do is something like this (example for JQuery 1.7.2):
$("#a").hover(function(){alert("test")});
$("#a")[0].active=true;
$("#b").click(function(){
if($("#a")[0].active){
$("#a")[0].storedEvents = [];
var hoverEvents = $("#a").data("events").mouseover;
jQuery.each(hoverEvents , function(key,handlerObj) {
$("#a")[0].storedEvents.push(handlerObj.handler);
});
$("#a").off('hover');
}else{
for(var i=0;i<$("#a")[0].storedEvents.length;i++){
$("#a").hover($("#a")[0].storedEvents[i]);
}
}
$("#a")[0].active = ($("#a")[0].active)==false;
});​
JSFiddle Example
But there are a couple of things that you must have in consideration:
This will only work if you add the events with JQuery, because JQuery keeps an internal track of the event handlers that have been added.
Each version of JQuery handles data("events") differently, that means that this code may not work with other version of JQuery.
I hope that this helps.
EDIT:
data("events") was an internal undocumented data structure used in JQuery 1.6 and JQUery 1.7, but it has been removed in JQuery 1.8. So in JQuery 1.8 the only way to access the events data is through: $._data(element, "events"). But keep in mind the advice from the JQuery documentation: this is not a supported public interface; the actual data structures may change incompatibly from version to version.

You could try having a variable that is outside the scope of functions a and b, and use that variable to trigger the action to take in function b on function a.
var state;
var a = function() {
if(!state) {
state = true;
// Add hover action and other prep. I'd create a third function to handle this.
console.log(state);
};
var b = function() {
if(state) {
state = false;
// Do unbinding of hover code with third function.
} else {
state = true;
// Do whatever else you needed to do
}
}
Without knowing more about what you're trying to do, I'd try something similar to this.

It sounds like you want to disable the click hover event for A if B is clicked.
$("body").on("hover", "#a", function(){
alert("hovering");
});
$("#b").click( function(){
$("body").off("hover", "#a", function() {
alert("removed hovering");
});
});
You can use the jQuery off method, have a look at this fiddle. http://jsfiddle.net/nKLwK/1/

Define a function to assign to hover on A element, so in b click, call unbind('hover') for A element and in second click on b element define again a function to hover, like this:
function aHover(eventObject) {
// Todo when the mouse enter object. You can use $(this) here
}
function aHoverOut(eventObject) {
// Todo when the mouse leave the object. You can use $(this) here
}
$(A).hover(aHover, aHoverOut);
// ...
$(b).click(function(eventObject) {
if($.hasData($(A)[0])){ // if A has event,
$(A).unbind('mouseenter mouseleave'); // This is because not a event hover, jQuery convert the element.hover(hoverIn, hoverOut) in element.bind('mouseenter', hoverIn) and element.bind('mouseleave', hoverOut)
}else{
$(A).hover(aHover, aHoverOut);
}
});

There are provably better ways to do it, but this works fine, on document ready do this:
$("#a")[0].active=false;
$("#b").click(function(){
$("#a")[0].active = ($("#a")[0].active)==false;
if($("#a")[0].active){
$("#a").hover(function(){alert("test")});
}else{
$("#a").off('hover');
}
});
JSFiddle example

You can use .off function from jQuery to unbind the hover on your "a" element.
function hoverA() {
alert('I\'m on hover');
}
$('#a').hover( hoverA );
var active = true;
$('#b').on('click', function(){
if(active){
$('#a').off('hover');
active = false;
} else{
$('#a').hover(hoverA);
active = true;
}
});
Live demo available here : http://codepen.io/joe/pen/wblpC

JavaScript - Hook in some check on all 'click' events

So I have a regular onclick event attached to a few buttons, each function that handles the onclick event does something different (so I can't reuse the same function for both events).
element1.onclick = function() {
if(this.classList.contains('disabled') {
return false;
}
// For example make an AJAX call
};
element2.onclick = function() {
if(this.classList.contains('disabled') {
return false;
}
// For example hide a div
};
I'm writing duplicate code for this 'disabled' class check, I want to eliminate this by hooking in some common onclick check then fire the regular onclick event if that check passes.
I know the below won't work but I think it will illustrate what I'm trying to do:
document.addEventListener('click', function() {
// 1. Do the disabled check here
// 2. If the check passes delegate the event to the proper element it was invoked on
// 3. Otherwise kill the event here
});
I'm not using any JavaScript library and I don't plan to, in case someone comes up with 'Just use jQuery' type answers.
EDIT: Had to pass boolean third argument to addEventListener as true and everything is fine.

Use event capturing, like so:
document.addEventListener('click', function(event) {
if (/* your disabled check here */) {
// Kill the event
event.preventDefault();
event.stopPropagation();
}
// Doing nothing in this method lets the event proceed as normal
},
true // Enable event capturing!
);

Sounds like you need to set the capture flag to true and then use .stopPropagation() on the event if a certain condition is met at the target, f.ex:
document.addEventListener('click', function(e) {
if ( condition ) {
e.stopPropagation();
// do soemthing else, the default onclick will never happen
}
}, true);​​​​​​​​​​​​​​​​​​​​​​
Here is a demo: http://jsfiddle.net/v9TEj/

You can create a generic function that receives a callback:
//check everything here
function handleOnclick(callback) {
if(this.classList.contains("disabled")) {
return false;
} else {
callback(); //callback here
}
}
//and now on every onclick, just pass the custom behavior
element1.onclick = function() {
handleOnClick(function() {
console.log('element1 onclick fire'); // For example hide a div
});
};
element2.onclick = function() {
handleOnClick(function() {
console.log('element2 onclick fire'); // For example ajax request
});
};
Edit
Based on your latest comment, let me know if this rewrite works for you... only one biding this time.
element1.customFunction = function() {
handleOnClick(function() {
console.log('element1 onclick fire'); // For example hide a div
});
};
element2.customFunction = function() {
handleOnClick(function() {
console.log('element2 onclick fire'); // For example ajax request
});
};
document.addEventListener('click', function() {
//1. grab the element
//2. check if it has the customFunction defined
//3. if it does, call it, the check will be done inside
};