Develop Reference

i want call a function when click close browser ... element of button close browser?

This is my javascript code ...i want call a function when click close browser at window.close().But not working..You can help me.Thank so much.<3
<script>
$(document).ready(function () {
var typeChange = false;
$(document).on("keyup", 'form input', function (e) {
typeChange = true;
});
$(document).on("change", 'form select', function (e) {
typeChange = true;
});
function changeURL() {
window.addEventListener("beforeunload", function (e) {
if (typeChange) {
e.preventDefault();
e.returnValue = "";
}
}, {once : true});
}
$(document).on('click', '.sidebar-menu a', function() {
changeURL();
});
// window.addEventListener("close", function () {
// changeURL();
// });
// window.close() = function() {
// changeURL();
// };
});
</script>

You were quite close... But there are two things:
You have to register the event listener for beforeunload when the page loads... Not when it is about to unload ;)
It won't be necessary to use an event handler on the .sidebar-menu a elements if those links are making the browser to navigate.
So here is the code that should work for you:
$(document).ready(function () {
var typeChange = false;
$(document).on("keyup", 'form input', function (e) {
typeChange = true;
});
$(document).on("change", 'form select', function (e) {
typeChange = true;
});
window.addEventListener("beforeunload", function (e) {
if (typeChange) {
e.preventDefault();
e.returnValue = "";
}
}, {once : true});
});

I'm afraid 'window' object doesn't have event 'close', howerver it has event 'beforeunload'. check belows codes copied from the below link.
window.addEventListener('beforeunload', function (e) {
e.preventDefault();
e.returnValue = '';
});
Below artilce explains it in much more details
https://www.geeksforgeeks.org/how-to-detect-browser-or-tab-closing-in-javascript/#:~:text=A%20tab%20or%20window%20closing,the%20tab%20or%20the%20browser.

How do fix :"Cannot read property 'init' of undefined TypeError"?

I using Jquery-3.2.1, Jquery-Ui 1.12.1.In my JavaScript file:
window.TruyenOnlineScript = (function () {
var _this = {};
_this.init = function () {
_this.initSearchMobile();
_this.initSidebar();
};
_this.initSearchMobile = function () {
//Open Input Search Mobile
$('.js-open-search-box-mobile').on('click', function (event) {
event.preventDefault();
$('body').addClass('open-search-box');
setTimeout(function () {
$('#js-search-input-mobile').focus()
}, 500);
});
};
_this.initSidebar = function () {
//Open Navbar Moblie
$('.js-open-sidebar').on('click', function (event) {
event.preventDefault();
event.stopPropagation();
$('body').addClass('open-sidebar');
});
};
})();
$('document').ready(function () {
window.TruyenOnlineScript.init();
});
But I got the error "init of undefined":
Can anybody show me how to fix it? Thank you!

You are setting window.TruyenOnlineScript to the return value of an Immediately Invoked Function Expression:
window.TruyenOnlineScript = (function () {
. . .
})();
but that expression doesn't return any value and so window.TruyenOnlineScript winds up being undefined (and that's why you can't call init() on undefined).
You need to have the IIFE return an object for TruyenOnlineScript to reference.
window.TruyenOnlineScript = (function () {
var _this = {};
_this.init = function () {
_this.initSearchMobile();
_this.initSidebar();
};
_this.initSearchMobile = function () {
//Open Input Search Mobile
$('.js-open-search-box-mobile').on('click', function (event) {
event.preventDefault();
$('body').addClass('open-search-box');
setTimeout(function () {
$('#js-search-input-mobile').focus()
}, 500);
});
};
_this.initSidebar = function () {
//Open Navbar Moblie
$('.js-open-sidebar').on('click', function (event) {
event.preventDefault();
event.stopPropagation();
$('body').addClass('open-sidebar');
});
};
return _this; // <-- Now this will be returned
})();
$('document').ready(function () {
window.TruyenOnlineScript.init();
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

Some users have already given you the solution, but I want to show you another way to create the same object. I can't say it's "better", but it's clearer and a little easier to understand:
window.TruyenOnlineScript = {
init: function () {
this.initSearchMobile();
this.initSidebar();
},
initSearchMobile: function () {
//Open Input Search Mobile
$('.js-open-search-box-mobile').on('click', function (event) {
event.preventDefault();
$('body').addClass('open-search-box');
setTimeout(function () {
$('#js-search-input-mobile').focus()
}, 500);
});
},
initSidebar: function () {
//Open Navbar Moblie
$('.js-open-sidebar').on('click', function (event) {
event.preventDefault();
event.stopPropagation();
$('body').addClass('open-sidebar');
});
}
};

How can prevent the scroll event execute more times?

I am implementing a new feature to let my page to support endless scroll AJAX show. But when I pull down my page scroll bar, sometimes the same request occurs.
This means that alert(nextPage) method is executed and it shows the same result. I've added the event.stopPropagation() code, but it didn't solve the problem. How can i fix it?
(function(window, undefined) {
var app = {
event: {
add: function(obj, type, handle) {
try {
obj.addEventListener(type, handle, false);
} catch (e) {
try {
obj.attachEvent('on' + type, handle);
} catch (e) {
obj['on' + type] = handle;
}
}
}
},
scroll: function(id, url) {
$.get(url, function(html) {
$("#" + id).append(html)
});
}
}
})(window);
HTML
<script>
$(function() {
app.event.add(window, "scroll", function(event) {
var nextPage = getNextPage();
alert(nextPage);
app.scroll("productTable", '?page=' + nextPage);
if (event && event.stopPropagation) {
event.stopPropagation();
} else {
window.event.cancelBubble = true;
}
});
});
</script>

Create function for CamanJS Plugin

is there any chance to create a function that i can call?
if i'm putting the following lines in the document ready function it works:
Caman("25-02-2014_16-37-13.jpg", "#example-canvas", function () {
this.brightness(brightness);
this.render(function () {
check = this.toBase64();
});
But if i'm doing this i can't call. So I tried this:
function icancall()
{
Caman("25-02-2014_16-37-13.jpg", "#example-canvas", function () {
this.brightness(brightness);
this.render(function () {
check = this.toBase64();
});
}
So i thought i can call this with icancall(); But nothing happened. What am I doing wrong?
What i want do: executing the Caman function on a button click.
I hope you can help me !

function resz(){
Caman("25-02-2014_16-37-13.jpg", "#example-canvas", function () {
try {
this.render(function () {
var image = this.toBase64();
xyz(image); // call that function where you pass filters
});
} catch (e) { alert(e) }
});
}
[Apply CamanJS filters by this function]
function xyz(image){
var filters_k = $('#filters');
filters_k.click(function (e) {
e.preventDefault();
var f = $(this);
if (f.is('.active')) {
// Apply filters only once
return false;
}
filters_k.removeClass('active');
f.addClass('active');
var effect = $.trim(f[0].id);
Caman(canvasID, img, function () {
if (effect in this) {
this.revert(false);
this[effect]();
this.render();
}
});
});
}

How can I listen for a click-and-hold in jQuery?

I want to be able to fire an event when a user clicks on a button, then holds that click down for 1000 to 1500 ms.
Is there jQuery core functionality or a plugin that already enables this?
Should I roll my own? Where should I start?

var timeoutId = 0;
$('#myElement').on('mousedown', function() {
timeoutId = setTimeout(myFunction, 1000);
}).on('mouseup mouseleave', function() {
clearTimeout(timeoutId);
});
Edit: correction per AndyE...thanks!
Edit 2: using bind now for two events with same handler per gnarf

Aircoded (but tested on this fiddle)
(function($) {
function startTrigger(e) {
var $elem = $(this);
$elem.data('mouseheld_timeout', setTimeout(function() {
$elem.trigger('mouseheld');
}, e.data));
}
function stopTrigger() {
var $elem = $(this);
clearTimeout($elem.data('mouseheld_timeout'));
}
var mouseheld = $.event.special.mouseheld = {
setup: function(data) {
// the first binding of a mouseheld event on an element will trigger this
// lets bind our event handlers
var $this = $(this);
$this.bind('mousedown', +data || mouseheld.time, startTrigger);
$this.bind('mouseleave mouseup', stopTrigger);
},
teardown: function() {
var $this = $(this);
$this.unbind('mousedown', startTrigger);
$this.unbind('mouseleave mouseup', stopTrigger);
},
time: 750 // default to 750ms
};
})(jQuery);
// usage
$("div").bind('mouseheld', function(e) {
console.log('Held', e);
})

I made a simple JQuery plugin for this if anyone is interested.
http://plugins.jquery.com/pressAndHold/

Presumably you could kick off a setTimeout call in mousedown, and then cancel it in mouseup (if mouseup happens before your timeout completes).
However, looks like there is a plugin: longclick.

var _timeoutId = 0;
var _startHoldEvent = function(e) {
_timeoutId = setInterval(function() {
myFunction.call(e.target);
}, 1000);
};
var _stopHoldEvent = function() {
clearInterval(_timeoutId );
};
$('#myElement').on('mousedown', _startHoldEvent).on('mouseup mouseleave', _stopHoldEvent);

Here's my current implementation:
$.liveClickHold = function(selector, fn) {
$(selector).live("mousedown", function(evt) {
var $this = $(this).data("mousedown", true);
setTimeout(function() {
if ($this.data("mousedown") === true) {
fn(evt);
}
}, 500);
});
$(selector).live("mouseup", function(evt) {
$(this).data("mousedown", false);
});
}

I wrote some code to make it easy
//Add custom event listener
$(':root').on('mousedown', '*', function() {
var el = $(this),
events = $._data(this, 'events');
if (events && events.clickHold) {
el.data(
'clickHoldTimer',
setTimeout(
function() {
el.trigger('clickHold')
},
el.data('clickHoldTimeout')
)
);
}
}).on('mouseup mouseleave mousemove', '*', function() {
clearTimeout($(this).data('clickHoldTimer'));
});
//Attach it to the element
$('#HoldListener').data('clickHoldTimeout', 2000); //Time to hold
$('#HoldListener').on('clickHold', function() {
console.log('Worked!');
});
<script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
<img src="http://lorempixel.com/400/200/" id="HoldListener">
See on JSFiddle
Now you need just to set the time of holding and add clickHold event on your element

Try this:
var thumbnailHold;
$(".image_thumb").mousedown(function() {
thumbnailHold = setTimeout(function(){
checkboxOn(); // Your action Here
} , 1000);
return false;
});
$(".image_thumb").mouseup(function() {
clearTimeout(thumbnailHold);
});