Want to perform different task on mousedown and click event - javascript

In JavaScript mousedown event followed by mouseup and click. so in click event three of this event execute. But in my task, i want to do the different task for mousedown and click.
if anyone press and hold mouse for a while then a list will show and click event will not execute.
when just click then the task for the click will execute.
It is as like as chrome back arrow functionality.
anyone to help. Thanks in advance.

You can do it like this:
var pressTimer, longClick;
function mouseUpCheck() {
clearTimeout(pressTimer);
window.removeEventListener('mouseup', mouseUpCheck);
}
document.querySelector('.link').addEventListener('mousedown', function(){
window.addEventListener('mouseup', mouseUpCheck);
pressTimer = window.setTimeout(function() { longClick = true; alert('long click'); },2000);
});
document.querySelector('.link').addEventListener('click', function() {
if (longClick) {
event.stopPropagation();
event.preventDefault();
longClick = false;
return;
}
alert('click');
});
<a class="link">click me</a>

Mousedown doens't generate multiple events for down, so here I've used a setInterval to keep checking if the mouse is still down.
Just done a quick mod, forgot that a mouseup on an element doesn't get triggered if you mouse out of the element. So here I'm attaching the event to the window instead.
var d = document.querySelector('div');
var dtime;
var i;
d.onmousedown = function () {
window.addEventListener('mouseup', mouseUpCheck);
dtime = new Date();
i = setInterval(function () {
if (dtime) {
var t = new Date();
if (t.getTime() - dtime.getTime() >= 2000) {
dtime = null; //stop now..
console.log('2 second mousedown');
}
}
}, 50);
}
function mouseUpCheck() {
dtime = null;
window.removeEventListener('mouseup', mouseUpCheck);
clearInterval(i);
}
<div>Click Hold for 2 seconds</div>

For both event working in same selector:
var pressTimer, longClick;
function mouseUpCheck() {
clearTimeout(pressTimer);
window.removeEventListener('mouseup', mouseUpCheck);
}
document.querySelector('.mySelector').addEventListener('mousedown', function(){
window.addEventListener('mouseup', mouseUpCheck);
pressTimer = window.setTimeout(function() {
longClick = true;
//code for longclick
},2000);
});
document.querySelector('.mySelector').addEventListener('click', function(event) {
if (longClick) {
longClick = false;
event.stopPropagation();
event.preventDefault();
return;
}
// code for simple click
});

Related

Why event listener persists after manual removal

All,
I try to build a resizer UI like this:
My code is like:
<span class="grabber" draggable="false" #mousedown="grab"></span>
grab: function(e) {
var initX = e.screenX;
var mousemove = function(e) {
var offset = e.screenX - initX
initX = e.screenX;
}
var cancel = function(e) {
$(document).off("mousemove")
$(document).off("mouseup")
}
$(document).on("mousemove", mousemove)
$(document).on("mouseup", cancel)
mousemove = null;
cancel = null;
}
Basic idea is: I attach that grab event handler to mousedown, inside which I listen to mousemove until mouseup, then I remove those two event handlers from document.
I am pretty new to Chrome Performance tool, so I just simply record some drag of that resizer, then mouseup and drag again.
The result is confused, especially the number of listener goes up like crazy(but there seems no memory leak). I wonder where did I do wrong?
So what is happening here:
<span class="grabber" draggable="false" #mousedown="grab"></span>
every time mousedown happens vue runs grab
The safer thing to do in this case is attach the events directly to e.target also setting your handler function to null in the cancel function.
grab: function(e) {
var initX = e.screenX;
var target = e.target;
var mousemove = function(e) {
var offset = e.screenX - initX
initX = e.screenX;
}
var cancel = function(e) {
$(target).off("mousemove")
$(target).off("mouseup")
mousemove = null;
cancel = null;
}
$(target).on("mousemove", mousemove)
$(target).on("mouseup", cancel)
}
Use a flag variable instead of adding and removing the handler.
var mouseIsDown = false;
$(document).on("mousedown", function() {
mouseIsDown = true;
});
$(document).on("mouseup", function() {
mouseIsDown = false;
})
$(document).on("mousemove", function() {
if (mouseIsDown) {
// do what you want
}
});
The mousedown handler could be attached to specific elements that you can grab, rather than document.

Single click and Double click on the same element, not working; Javascript

I am trying to add a click function that triggers when a button is clicked. I am also trying to figure out how to add a double click function onto the same element, that triggers a different event.
var click = false;
onEvent("image2", "click", function(event) {
click = true;
});
if (click === true) {
setTimeout(function() {
onEvent("image2", "click", function(event) {
setScreen("safeScreen");
console.log("double click");
});
}, 200);
} else {
onEvent("image2", "dblclick", function(event) {
setScreen("safeScreen");
console.log("click");
});
}
This code is completely wrong, but I don't know where to start/correct. What am I doing wrong? I am looking to have the single click not trigger when the user double clicks.
Update:
Try passing a function clicks() to your event listener like so:
onEvent("image2", "click", clicks);
Function clicks() will check if there was a single or double click based on setTimeout function. You can adjust setTimeout via timeout variable and of course you need clickCount variable declared outside clicks() function.
Pure js approach
Try adding two event listeners. Less code, much cleaner. Check this working example.
var selector = document.getElementById('codeorg');
selector.addEventListener('click', clicks);
// Global Scope variable we need this
var clickCount = 0;
// Our Timeout, modify it if you need
var timeout = 500;
// Copy this function and it should work
function clicks() {
// We modify clickCount variable here to check how many clicks there was
clickCount++;
if (clickCount == 1) {
setTimeout(function(){
if(clickCount == 1) {
console.log('singleClick');
// Single click code, or invoke a function
} else {
console.log('double click');
// Double click code, or invoke a function
}
clickCount = 0;
}, timeout || 300);
}
}
// Not important for your needs - pure JS stuff
var button = document.getElementById('button');
button.addEventListener('click', singleClick);
button.addEventListener('dblclick', doubleClick);
function singleClick() {
//console.log('single click');
}
function doubleClick() {
console.log('double click');
}
#codeorg {
margin-bottom: 100px;
}
<h2>Double Click</h2>
<button id="button">Click me</button>
<hr><hr>
<h2>Double click or Single Click</h2>
<button id="codeorg">Click me</button>

Jquery: <a> link click preventDefault() not working?

I'm trying to prevent a link click from firing if accidentally touched while scrolling in mobile? I have never tried something like this before and am having trouble getting it to work right. I am testing this on a desktop for the time being.
My buttons are structured similar to:
<a href="http://www.google.com">
<div style="width:100%;height:80px;margin-bottom:50px;">test</div>
</a>
I am trying to use the preventDefault() function to override default click actions and check if a the page is being scrolled, or it the click was accidental before allowing it to work. The logic to check seems to work, however the links navigate on click no matter what i do. I assume this has something to do with the links behaviour being propogated to the child div, but am not sure.
Below is my script, the problem is in the last $('a').click(); function.
UPDATE:
I still need a better way to do it using just the $('a') selector if anyone knows how. Kind of a hack but, if i change the selector to $('a>div') and change the 'targetLink' to $(this).parent().attr('href') it seems to work, Is there a way to do this using $('a') only because some of my buttons have more children.
//Mobile accidental scroll click fix:---
//- prevent clicked link from executing if user scrolls after mousedown, until next mousedown.
//- prevent clicked link from executing if user is still scrolling and mouse is down(for slow scrolls)
$(document).ready(function(){
var self = this,
scrolling = false,
mouseDown = false,
scrollAfterPress = false;
scrollDelay = 1500,
linkConditionCheckDelay = 700;
$(window).scroll(function() {
self.scrolling = true;
console.log('scrolling:' + self.scrolling);
clearTimeout( $.data( this, "scrollCheck" ) );
$.data( this, "scrollCheck", setTimeout(function() {
self.scrolling = false;
console.log('scrolling:' + self.scrolling);
}, scrollDelay) );
});
$(document).mousedown(function(){
self.scrollAfterPress = false;
int00 = setInterval(function() { checkScrollAfterPress(); }, 100);//execute every 100ms (while mouse is down)
self.mouseDown = true;
console.log('mousedown:'+ self.mouseDown);
}).mouseup(function(){
clearInterval(int00);
self.mouseDown = false;
console.log('mousedown:'+ self.mouseDown);
});
function checkScrollAfterPress(){
if(self.scroll === true){
self.scrollAfterPress = true;
}
}
$('a').click(function(e){
//prevent default click event behaviour
var targetLink = $(this).attr('href');
console.log('clicked on:'+targetLink);
setTimeout(function() {
if(!self.scrolling && !self.mouseDown && !self.scrollAfterPress && targetLink !== undefined){
window.location.href = targetLink;
}
}, linkConditionCheckDelay); //add small delay to prevent immeditiate responses between mouse up and start of scroll.
e.stopPropagation();
e.preventDefault();
});
});
You can use return false or e.preventDefault
But when you click on that link why your adding window.location.href = targetLink;?? which will redirect the user to the given location.Same as link
Try my code below i have removed it.
$(document).ready(function(){
var self = this,
scrolling = false,
mouseDown = false,
scrollAfterPress = false;
scrollDelay = 1500,
linkConditionCheckDelay = 700;
$(window).scroll(function() {
self.scrolling = true;
console.log('scrolling:' + self.scrolling);
clearTimeout( $.data( this, "scrollCheck" ) );
$.data( this, "scrollCheck", setTimeout(function() {
self.scrolling = false;
console.log('scrolling:' + self.scrolling);
}, scrollDelay) );
});
$(document).mousedown(function(){
self.scrollAfterPress = false;
int00 = setInterval(function() { checkScrollAfterPress(); }, 100);//execute every 100ms (while mouse is down)
self.mouseDown = true;
console.log('mousedown:'+ self.mouseDown);
}).mouseup(function(){
clearInterval(int00);
self.mouseDown = false;
console.log('mousedown:'+ self.mouseDown);
});
function checkScrollAfterPress(){
if(self.scroll === true){
self.scrollAfterPress = true;
}
}
$('a').click(function(e){
//prevent default click event behaviour
var targetLink = $(this).attr('href');
console.log('clicked on:'+targetLink);
setTimeout(function() {
if(!self.scrolling && !self.mouseDown && !self.scrollAfterPress && targetLink !== undefined){
//window.location.href = targetLink;
}
}, linkConditionCheckDelay); //add small delay to prevent immeditiate responses between mouse up and start of scroll.
return false;
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<a href="http://www.google.com">
<div style="width:100%;height:80px;margin-bottom:50px;">test</div>
</a>
I will suggest another approach and use jQuery Mobile Events. Something like this:
*untested, but is the idea
// set global var 'locked'
var locked = false;
// locked var true while scrolling
jQuery(document).on('scrollstart', function() { locked = true; });
// locked var back to false when finish
jQuery(document).on('scrollstop', function() { locked = false; });
// bind 'tap' & 'click' events to 'a' tag
jQuery(document).on('tap click', 'a', function(event) {
// But before proceed, check locked var
if (locked) {
event.preventDefault;
return false;
} else {
// ok, proceed with the click and further events...
}
});
Docs/ref:
scrollstart event
scrollstop event
tap event
vclick event
.click()
Use in your $'a'.click(function(e){...} part return false; to prevent the default behavior.
In your case:
$('a').click(function(e){
var targetLink = $(this).attr('href');
console.log('clicked on:'+targetLink);
setTimeout(function() {
if(!self.scrolling && !self.mouseDown && !self.scrollAfterPress && targetLink !== undefined){
window.location.href = targetLink;
}
}, linkConditionCheckDelay);
return false;//Stops default behavior
});
Perhaps there is something I am missing, but I do not see why your code cannot be made as simple as the following:
$(document).ready(function () {
var is_scrolling = false;
var timeout = null;
$(window).scroll(function () {
is_scrolling = true;
if (timeout) {
clearTimeout(timeout);
}
timeout = setTimeout(function () {
is_scrolling = false;
}, 1500);
});
$('a').click(function (e){
if (is_scrolling) {
e.preventDefault();
}
});
});

Stop single click event when double-clicking? [duplicate]

Is there something in jquery that would allow me to differentiate between behavior on double click and single click?
When I bind both to same element only the single click gets executed.
Is there a way that wait for some time before execution of the single click to see if the user clicks again or not?
Thanks :)
I found that John Strickler's answer did not quite do what I was expecting. Once the alert is triggered by a second click within the two-second window, every subsequent click triggers another alert until you wait two seconds before clicking again. So with John's code, a triple click acts as two double clicks where I would expect it to act like a double click followed by a single click.
I have reworked his solution to function in this way and to flow in a way my mind can better comprehend. I dropped the delay down from 2000 to 700 to better simulate what I would feel to be a normal sensitivity. Here's the fiddle: http://jsfiddle.net/KpCwN/4/.
Thanks for the foundation, John. I hope this alternate version is useful to others.
var DELAY = 700, clicks = 0, timer = null;
$(function(){
$("a").on("click", function(e){
clicks++; //count clicks
if(clicks === 1) {
timer = setTimeout(function() {
alert("Single Click"); //perform single-click action
clicks = 0; //after action performed, reset counter
}, DELAY);
} else {
clearTimeout(timer); //prevent single-click action
alert("Double Click"); //perform double-click action
clicks = 0; //after action performed, reset counter
}
})
.on("dblclick", function(e){
e.preventDefault(); //cancel system double-click event
});
});
The solution given from "Nott Responding" seems to fire both events, click and dblclick when doubleclicked. However I think it points in the right direction.
I did a small change, this is the result :
$("#clickMe").click(function (e) {
var $this = $(this);
if ($this.hasClass('clicked')){
$this.removeClass('clicked');
alert("Double click");
//here is your code for double click
}else{
$this.addClass('clicked');
setTimeout(function() {
if ($this.hasClass('clicked')){
$this.removeClass('clicked');
alert("Just one click!");
//your code for single click
}
}, 500);
}
});
Try it
http://jsfiddle.net/calterras/xmmo3esg/
Sure, bind two handlers, one to click and the other to dblclick. Create a variable that increments on every click. then resets after a set delay. Inside the setTimeout function you can do something...
var DELAY = 2000,
clicks = 0,
timer = null;
$('a').bind({
click: function(e) {
clearTimeout(timer);
timer = setTimeout(function() {
clicks = 0;
}, DELAY);
if(clicks === 1) {
alert(clicks);
//do something here
clicks = 0;
}
//Increment clicks
clicks++;
},
dblclick: function(e) {
e.preventDefault(); //don't do anything
}
});
You could probably write your own custom implementation of click/dblclick to have it wait for an extra click. I don't see anything in the core jQuery functions that would help you achieve this.
Quote from .dblclick() at the jQuery site
It is inadvisable to bind handlers to both the click and dblclick events for the same element. The sequence of events triggered varies from browser to browser, with some receiving two click events before the dblclick and others only one. Double-click sensitivity (maximum time between clicks that is detected as a double click) can vary by operating system and browser, and is often user-configurable.
Look at the following code
$("#clickMe").click(function (e) {
var $this = $(this);
if ($this.hasClass('clicked')){
alert("Double click");
//here is your code for double click
return;
}else{
$this.addClass('clicked');
//your code for single click
setTimeout(function() {
$this.removeClass('clicked'); },500);
}//end of else
});
Demo goes here http://jsfiddle.net/cB484/
I've written a jQuery plugin that allow also to delegate the click and dblclick events
// jQuery plugin to bind both single and double click to objects
// parameter 'delegateSelector' is optional and allow to delegate the events
// parameter 'dblclickWait' is optional default is 300
(function($) {
$.fn.multipleClicks = function(delegateSelector, clickFun, dblclickFun, dblclickWait) {
var obj;
if (typeof(delegateSelector)==='function' && typeof(clickFun)==='function') {
dblclickWait = dblclickFun; dblclickFun = clickFun; clickFun = delegateSelector; delegateSelector = null; // If 'delegateSelector' is missing reorder arguments
} else if (!(typeof(delegateSelector)==='string' && typeof(clickFun)==='function' && typeof(dblclickFun)==='function')) {
return false;
}
return $(this).each(function() {
$(this).on('click', delegateSelector, function(event) {
var self = this;
clicks = ($(self).data('clicks') || 0)+1;
$(self).data('clicks', clicks);
if (clicks == 1) {
setTimeout(function(){
if ($(self).data('clicks') == 1) {
clickFun.call(self, event); // Single click action
} else {
dblclickFun.call(self, event); // Double click action
}
$(self).data('clicks', 0);
}, dblclickWait || 300);
}
});
});
};
})(jQuery);
This solution works for me
var DELAY = 250, clicks = 0, timer = null;
$(".fc-event").click(function(e) {
if (timer == null) {
timer = setTimeout(function() {
clicks = 0;
timer = null;
// single click code
}, DELAY);
}
if(clicks === 1) {
clearTimeout(timer);
timer = null;
clicks = -1;
// double click code
}
clicks++;
});
i am implementing this simple solution , http://jsfiddle.net/533135/VHkLR/5/
html code
<p>Click on this paragraph.</p>
<b> </b>
script code
var dbclick=false;
$("p").click(function(){
setTimeout(function(){
if(dbclick ==false){
$("b").html("clicked")
}
},200)
}).dblclick(function(){
dbclick = true
$("b").html("dbclicked")
setTimeout(function(){
dbclick = false
},300)
});
its not much laggy
var singleClickTimer = 0; //define a var to hold timer event in parent scope
jqueryElem.click(function(e){ //using jquery click handler
if (e.detail == 1) { //ensure this is the first click
singleClickTimer = setTimeout(function(){ //create a timer
alert('single'); //run your single click code
},250); //250 or 1/4th second is about right
}
});
jqueryElem.dblclick(function(e){ //using jquery dblclick handler
clearTimeout(singleClickTimer); //cancel the single click
alert('double'); //run your double click code
});
I made some changes to the above answers here which still works great: http://jsfiddle.net/arondraper/R8cDR/
Below is my simple approach to the issue.
JQuery function:
jQuery.fn.trackClicks = function () {
if ($(this).attr("data-clicks") === undefined) $(this).attr("data-clicks", 0);
var timer;
$(this).click(function () {
$(this).attr("data-clicks", parseInt($(this).attr("data-clicks")) + 1);
if (timer) clearTimeout(timer);
var item = $(this);
timer = setTimeout(function() {
item.attr("data-clicks", 0);
}, 1000);
});
}
Implementation:
$(function () {
$("a").trackClicks();
$("a").click(function () {
if ($(this).attr("data-clicks") === "2") {
// Double clicked
}
});
});
Inspect the clicked element in Firefox/Chrome to see data-clicks go up and down as you click, adjust time (1000) to suit.
(function($){
$.click2 = function (elm, o){
this.ao = o;
var DELAY = 700, clicks = 0;
var timer = null;
var self = this;
$(elm).on('click', function(e){
clicks++;
if(clicks === 1){
timer = setTimeout(function(){
self.ao.click(e);
}, DELAY);
} else {
clearTimeout(timer);
self.ao.dblclick(e);
}
}).on('dblclick', function(e){
e.preventDefault();
});
};
$.click2.defaults = { click: function(e){}, dblclick: function(e){} };
$.fn.click2 = function(o){
o = $.extend({},$.click2.defaults, o);
this.each(function(){ new $.click2(this, o); });
return this;
};
})(jQuery);
And finally we use as.
$("a").click2({
click : function(e){
var cid = $(this).data('cid');
console.log("Click : "+cid);
},
dblclick : function(e){
var cid = $(this).data('cid');
console.log("Double Click : "+cid);
}
});
Same as the above answer but allows for triple click. (Delay 500)
http://jsfiddle.net/luenwarneke/rV78Y/1/
var DELAY = 500,
clicks = 0,
timer = null;
$(document).ready(function() {
$("a")
.on("click", function(e){
clicks++; //count clicks
timer = setTimeout(function() {
if(clicks === 1) {
alert('Single Click'); //perform single-click action
} else if(clicks === 2) {
alert('Double Click'); //perform single-click action
} else if(clicks >= 3) {
alert('Triple Click'); //perform Triple-click action
}
clearTimeout(timer);
clicks = 0; //after action performed, reset counter
}, DELAY);
})
.on("dblclick", function(e){
e.preventDefault(); //cancel system double-click event
});
});
This is a method you can do using the basic JavaScript, which is works for me:
var v_Result;
function OneClick() {
v_Result = false;
window.setTimeout(OneClick_Nei, 500)
function OneClick_Nei() {
if (v_Result != false) return;
alert("single click");
}
}
function TwoClick() {
v_Result = true;
alert("double click");
}
If you don't want to create separate variables to manage the state, you can check this answer https://stackoverflow.com/a/65620562/4437468

Event Listener Help (making one button/element do multiple things)

Hi I have this issue where I cant get more than one event from my code.
the goal is to have this display both functions in order....any help would be awesome!!!
var button = document.getElementById("button element");
//only clicks once:
button.addEventListener("click", function, false);
button.addEventListener("click", function2, false);
If you want the handler triggered by a click to change, you change the handler:
function firstThing() {
// Do something
// Set up next handler
this.removeEventListener("click", firstThing, false);
this.addEventListener("click", nextThing, false);
}
function nextThing() { /* .... */ }
button.addEventListener("click", firstThing, false);
Or more simply, just keep track of the state:
var clicked = false;
button.addEventListener("click", function() {
if (!clicked) {
// Do the first thing
clicked = true;
}
else {
// Do the next thing
}
}, false);

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