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I want to trigger an ajax request when the user has finished typing in a text box. I don't want it to run the function on every time the user types a letter because that would result in A LOT of ajax requests, however I don't want them to have to hit the enter button either.
Is there a way so I can detect when the user has finished typing and then do the ajax request?
Using jQuery here!
So, I'm going to guess finish typing means you just stop for a while, say 5 seconds. So with that in mind, let's start a timer when the user releases a key and clear it when they press one. I decided the input in question will be #myInput.
Making a few assumptions...
//setup before functions
var typingTimer; //timer identifier
var doneTypingInterval = 5000; //time in ms, 5 seconds for example
var $input = $('#myInput');
//on keyup, start the countdown
$input.on('keyup', function () {
clearTimeout(typingTimer);
typingTimer = setTimeout(doneTyping, doneTypingInterval);
});
//on keydown, clear the countdown
$input.on('keydown', function () {
clearTimeout(typingTimer);
});
//user is "finished typing," do something
function doneTyping () {
//do something
}
The chosen answer above does not work.
Because typingTimer is occassionaly set multiple times (keyup pressed twice before keydown is triggered for fast typers etc.) then it doesn't clear properly.
The solution below solves this problem and will call X seconds after finished as the OP requested. It also no longer requires the redundant keydown function. I have also added a check so that your function call won't happen if your input is empty.
//setup before functions
var typingTimer; //timer identifier
var doneTypingInterval = 5000; //time in ms (5 seconds)
//on keyup, start the countdown
$('#myInput').keyup(function(){
clearTimeout(typingTimer);
if ($('#myInput').val()) {
typingTimer = setTimeout(doneTyping, doneTypingInterval);
}
});
//user is "finished typing," do something
function doneTyping () {
//do something
}
And the same code in vanilla JavaScript solution:
//setup before functions
let typingTimer; //timer identifier
let doneTypingInterval = 5000; //time in ms (5 seconds)
let myInput = document.getElementById('myInput');
//on keyup, start the countdown
myInput.addEventListener('keyup', () => {
clearTimeout(typingTimer);
if (myInput.value) {
typingTimer = setTimeout(doneTyping, doneTypingInterval);
}
});
//user is "finished typing," do something
function doneTyping () {
//do something
}
This solution does use ES6 but it's not necessary here. Just replace let with var and the arrow function with a regular function.
It's just one line with underscore.js debounce function:
$('#my-input-box').keyup(_.debounce(doSomething , 500));
This basically says doSomething 500 milliseconds after I stop typing.
For more info: http://underscorejs.org/#debounce
Late answer but I'm adding it because it's 2019 and this is entirely achievable using pretty ES6, no third party libraries, and I find most of the highly rated answers are bulky and weighed down with too many variables.
Elegant solution taken from this excellent blog post.
function debounce(callback, wait) {
let timeout;
return (...args) => {
clearTimeout(timeout);
timeout = setTimeout(function () { callback.apply(this, args); }, wait);
};
}
window.addEventListener('keyup', debounce( () => {
// code you would like to run 1000ms after the keyup event has stopped firing
// further keyup events reset the timer, as expected
}, 1000))
Yes, you can set a timeout of say 2 seconds on each and every key up event which will fire an ajax request. You can also store the XHR method and abort it on subsequent key press events so that you save bandwith even more. Here's something I've written for an autocomplete script of mine.
var timer;
var x;
$(".some-input").keyup(function () {
if (x) { x.abort() } // If there is an existing XHR, abort it.
clearTimeout(timer); // Clear the timer so we don't end up with dupes.
timer = setTimeout(function() { // assign timer a new timeout
x = $.getJSON(...); // run ajax request and store in x variable (so we can cancel)
}, 2000); // 2000ms delay, tweak for faster/slower
});
Hope this helps,
Marko
var timer;
var timeout = 1000;
$('#in').keyup(function(){
clearTimeout(timer);
if ($('#in').val) {
timer = setTimeout(function(){
//do stuff here e.g ajax call etc....
var v = $("#in").val();
$("#out").html(v);
}, timeout);
}
});
full example here: http://jsfiddle.net/ZYXp4/8/
Both top 2 answers doesn't work for me. So, here is my solution:
var timeout = null;
$('#myInput').keyup(function() {
clearTimeout(timeout);
timeout = setTimeout(function() {
//do stuff here
}, 500);
});
Declare the following delay function:
var delay = (function () {
var timer = 0;
return function (callback, ms) {
clearTimeout(timer);
timer = setTimeout(callback, ms);
};
})()
and then use it:
let $filter = $('#item-filter');
$filter.on('keydown', function () {
delay(function () {
console.log('this will hit, once user has not typed for 1 second');
}, 1000);
});
Modifying the accepted answer to handle additional cases such as paste:
//setup before functions
var typingTimer; //timer identifier
var doneTypingInterval = 2000; //time in ms, 2 second for example
var $input = $('#myInput');
// updated events
$input.on('input propertychange paste', function () {
clearTimeout(typingTimer);
typingTimer = setTimeout(doneTyping, doneTypingInterval);
});
//user is "finished typing," do something
function doneTyping () {
//do something
}
I like Surreal Dream's answer but I found that my "doneTyping" function would fire for every keypress, i.e. if you type "Hello" really quickly; instead of firing just once when you stop typing, the function would fire 5 times.
The problem was that the javascript setTimeout function doesn't appear to overwrite or kill the any old timeouts that have been set, but if you do it yourself it works! So I just added a clearTimeout call just before the setTimeout if the typingTimer is set. See below:
//setup before functions
var typingTimer; //timer identifier
var doneTypingInterval = 5000; //time in ms, 5 second for example
//on keyup, start the countdown
$('#myInput').on("keyup", function(){
if (typingTimer) clearTimeout(typingTimer); // Clear if already set
typingTimer = setTimeout(doneTyping, doneTypingInterval);
});
//on keydown, clear the countdown
$('#myInput').on("keydown", function(){
clearTimeout(typingTimer);
});
//user is "finished typing," do something
function doneTyping () {
//do something
}
N.B. I would have liked to have just added this as a comment to Surreal Dream's answer but I'm a new user and don't have enough reputation. Sorry!
I don't think keyDown event is necessary in this case (please tell me why if I'm wrong). In my (non-jquery) script similar solution looks like that:
var _timer, _timeOut = 2000;
function _onKeyUp(e) {
clearTimeout(_timer);
if (e.keyCode == 13) { // close on ENTER key
_onCloseClick();
} else { // send xhr requests
_timer = window.setTimeout(function() {
_onInputChange();
}, _timeOut)
}
}
It's my first reply on Stack Overflow, so I hope this helps someone, someday:)
const inText = document.getElementById('inText')
const outText = document.getElementById('outText')
const delay = 1000
let timer
inText.addEventListener('input', code => {
clearTimeout(timer);
timer = setTimeout(x => {
outText.innerHTML = inText.value
}, delay, code)
})
<textarea id='inText'>edit this and...</textarea>
<pre id='outText'>see the results after you stop typing for one second</pre>
Well, strictly speaking no, as the computer cannot guess when the user has finished typing. You could of course fire a timer on key up, and reset it on every subsequent key up. If the timer expires, the user hasn't typed for the timer duration - you could call that "finished typing".
If you expect users to make pauses while typing, there's no way to know when they are done.
(Unless of course you can tell from the data when they are done)
agree with the #going 's answer. Another similar solution that worked for me is the one below. The only difference is that I am using .on("input"...) instead of keyup. This only captures changes in the input. other keys like Ctrl, Shift etc. are ignored
var typingTimer; //timer identifier
var doneTypingInterval = 5000; //time in ms (5 seconds)
//on input change, start the countdown
$('#myInput').on("input", function() {
clearTimeout(typingTimer);
typingTimer = setTimeout(function(){
// doSomething...
}, doneTypingInterval);
});
I was implementing the search at my listing and needed it to be ajax based. That means that on every key change, searched results should be updated and displayed. This results in so many ajax calls sent to server, which is not a good thing.
After some working, I made an approach to ping the server when the user stops typing.
This solution worked for me:
$(document).ready(function() {
$('#yourtextfield').keyup(function() {
s = $('#yourtextfield').val();
setTimeout(function() {
if($('#yourtextfield').val() == s){ // Check the value searched is the latest one or not. This will help in making the ajax call work when client stops writing.
$.ajax({
type: "POST",
url: "yoururl",
data: 'search=' + s,
cache: false,
beforeSend: function() {
// loading image
},
success: function(data) {
// Your response will come here
}
})
}
}, 1000); // 1 sec delay to check.
}); // End of keyup function
}); // End of document.ready
You will notice that there is no need to use any timer while implementing this.
I feel like the solution is somewhat a bit simpler with the input event:
var typingTimer;
var doneTypingInterval = 500;
$("#myInput").on("input", function () {
window.clearTimeout(typingTimer);
typingTimer = window.setTimeout(doneTyping, doneTypingInterval);
});
function doneTyping () {
// code here
}
I just figured out a simple code to wait for user to finish typing:
step 1.set time out to null then clear the current timeout when the user is typing.
step 2.trigger clear timeout to the variable define before keyup event is triggered.
step 3.define timeout to the variable declared above;
<input type="text" id="input" placeholder="please type" style="padding-left:20px;"/>
<div class="data"></div>
javascript code
var textInput = document.getElementById('input');
var textdata = document.querySelector('.data');
// Init a timeout variable to be used below
var timefired = null;
// Listen for keystroke events
// Init a timeout variable to be used below
var timefired = null;// Listen for keystroke events
textInput.onkeyup = function (event) {
clearTimeout(timefired);
timefired = setTimeout(function () {
textdata.innerHTML = 'Input Value:'+ textInput.value;
}, 600);
};
This is the a simple JS code I wrote:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="pt-br" lang="pt-br">
<head><title>Submit after typing finished</title>
<script language="javascript" type="text/javascript">
function DelayedSubmission() {
var date = new Date();
initial_time = date.getTime();
if (typeof setInverval_Variable == 'undefined') {
setInverval_Variable = setInterval(DelayedSubmission_Check, 50);
}
}
function DelayedSubmission_Check() {
var date = new Date();
check_time = date.getTime();
var limit_ms=check_time-initial_time;
if (limit_ms > 800) { //Change value in milliseconds
alert("insert your function"); //Insert your function
clearInterval(setInverval_Variable);
delete setInverval_Variable;
}
}
</script>
</head>
<body>
<input type="search" onkeyup="DelayedSubmission()" id="field_id" style="WIDTH: 100px; HEIGHT: 25px;" />
</body>
</html>
Why not just use onfocusout?
https://www.w3schools.com/jsreF/event_onfocusout.asp
If it's a form, they will always leave focus of every input field in order to click the submit button so you know no input will miss out on getting its onfocusout event handler called.
Multiple timers per page
All the other answers only work for one control (my other answer included).
If you have multiple controls per page (e.g. in a shopping cart) only the last control where the user typed something will get called. In my case this is certainly not the wished behaviour - each control should have its own timer.
To solve this, you simply have to pass an ID to the function and maintain a timeoutHandles dictionary as in the following code:
Function Declaration:
var delayUserInput = (function () {
var timeoutHandles = {};
return function (id, callback, ms) {
if (timeoutHandles[id]) {
clearTimeout(timeoutHandles[id]);
}
timeoutHandles[id] = setTimeout(callback, ms);
};
})();
Function Usage:
delayUserInput('yourID', function () {
//do some stuff
}, 1000);
Here is a solution that fires after 1 second of not typing, but also fires instantly when the input is blank. This is useful when clearing search results after the user deletes the input query. This solution also supports copying and pasting into the search box. The $(() => { ... }); wrapping the top portion of code simply means "do this when the page is loaded" in simple Jquery terms.
var searchTimer;
var searchInterval = 1000;
$(() => {
$('#search-box').on('input', (event) => {
clearTimeout(searchTimer);
searchTimer = setTimeout(() => {
searchContacts(event.target.value);
}, (event.target.value.length > 0) ? searchInterval : 0);
});
});
function searchContacts(val) {
console.log('searching: ' + val);
}
You can use the onblur event to detect when the textbox loses focus:
https://developer.mozilla.org/en/DOM/element.onblur
That's not the same as "stops typing", if you care about the case where the user types a bunch of stuff and then sits there with the textbox still focused.
For that I would suggest tying a setTimeout to the onclick event, and assuming that after x amount of time with no keystrokes, the user has stopped typing.
If there is necessity for the user to move away from the field, we can use "onBlur" instead of Onchange in Javascript
<TextField id="outlined-basic" variant="outlined" defaultValue={CardValue} onBlur={cardTitleFn} />
If that is not necessary setting timer would be the good option.
for alpine.js users <input #input.debounce.500ms="fn()">
Once you detect focus on the text box, on key up do a timeout check, and reset it each time it's triggered.
When the timeout completes, do your ajax request.
If you are looking for a specific length (such as a zipcode field):
$("input").live("keyup", function( event ){
if(this.value.length == this.getAttribute('maxlength')) {
//make ajax request here after.
}
});
Not sure if my needs are just kind of weird, but I needed something similar to this and this is what I ended up using:
$('input.update').bind('sync', function() {
clearTimeout($(this).data('timer'));
$.post($(this).attr('data-url'), {value: $(this).val()}, function(x) {
if(x.success != true) {
triggerError(x.message);
}
}, 'json');
}).keyup(function() {
clearTimeout($(this).data('timer'));
var val = $.trim($(this).val());
if(val) {
var $this = $(this);
var timer = setTimeout(function() {
$this.trigger('sync');
}, 2000);
$(this).data('timer', timer);
}
}).blur(function() {
clearTimeout($(this).data('timer'));
$(this).trigger('sync');
});
Which allows me to have elements like this in my application:
<input type="text" data-url="/controller/action/" class="update">
Which get updated when the user is "done typing" (no action for 2 seconds) or goes to another field (blurs out of the element)
If you need wait until user is finished with typing use simple this:
$(document).on('change','#PageSize', function () {
//Do something after new value in #PageSize
});
Complete Example with ajax call - this working for my pager - count of item per list:
$(document).ready(function () {
$(document).on('change','#PageSize', function (e) {
e.preventDefault();
var page = 1;
var pagesize = $("#PageSize").val();
var q = $("#q").val();
$.ajax({
url: '#Url.Action("IndexAjax", "Materials", new { Area = "TenantManage" })',
data: { q: q, pagesize: pagesize, page: page },
type: 'post',
datatype: "json",
success: function (data) {
$('#tablecontainer').html(data);
// toastr.success('Pager has been changed', "Success!");
},
error: function (jqXHR, exception) {
ShowErrorMessage(jqXHR, exception);
}
});
});
});
Simple and easy to understand.
var mySearchTimeout;
$('#ctl00_mainContent_CaseSearch').keyup(function () {
clearTimeout(mySearchTimeout);
var filter = $(this).val();
mySearchTimeout = setTimeout(function () { myAjaxCall(filter); }, 700);
return true;
});
For passing parameters to your function along with ES6 syntax.
$(document).ready(() => {
let timer = null;
$('.classSelector').keydown(() => {
clearTimeout(timer);
timer = setTimeout(() => foo('params'), 500);
});
});
const foo = (params) => {
console.log(`In foo ${params}`);
}
I can't figure out how to do it.
I have two separate scripts. The first one generates an interval (or a timeout) to run a specified function every x seconds, i.e. reload the page.
The other script contains actions for a button to control (pause/play) this interval.
The pitfall here is that both sides must be asyncronous (both run when the document is loaded).
How could I properly use the interval within the second script?
Here's the jsFiddle: http://jsfiddle.net/hm2d6d6L/4/
And here's the code for a quick view:
var interval;
// main script
(function($){
$(function(){
var reload = function() {
console.log('reloading...');
};
// Create interval here to run reload() every time
});
})(jQuery);
// Another script, available for specific users
(function($){
$(function(){
var $playerButton = $('body').find('button.player'),
$icon = $playerButton.children('i');
buttonAction = function(e){
e.preventDefault();
if ($(this).hasClass('playing')) {
// Pause/clear interval here
$(this).removeClass('playing').addClass('paused');
$icon.removeClass('glyphicon-pause').addClass('glyphicon-play');
}
else {
// Play/recreate interval here
$(this).removeClass('paused').addClass('playing');
$icon.removeClass('glyphicon-play').addClass('glyphicon-pause');
}
},
buttonInit = function() {
$playerButton.on('click', buttonAction);
};
buttonInit();
});
})(jQuery);
You could just create a simple event bus. This is pretty easy to create with jQuery, since you already have it in there:
// somewhere globally accessible (script 1 works fine)
var bus = $({});
// script 1
setInterval(function() {
reload();
bus.trigger('reload');
}, 1000);
// script 2
bus.on('reload', function() {
// there was a reload in script 1, yay!
});
I've found a solution. I'm sure it's not the best one, but it works.
As you pointed out, I eventually needed at least one global variable to act as a join between both scripts, and the use of a closure to overcome asyncronous issues. Note that I manipulate the button within reload, just to remark that sometimes it's not as easy as moving code outside in the global namespace:
Check it out here in jsFiddle: yay! this works!
And here's the code:
var intervalControl;
// main script
(function($){
$(function(){
var $playerButton = $('body').find('button.player'),
reload = function() {
console.log('reloading...');
$playerButton.css('top', parseInt($playerButton.css('top')) + 1);
};
var interval = function(callback) {
var timer,
playing = false;
this.play = function() {
if (! playing) {
timer = setInterval(callback, 2000);
playing = true;
}
};
this.pause = function() {
if (playing) {
clearInterval(timer);
playing = false;
}
};
this.play();
return this;
};
intervalControl = function() {
var timer = interval(reload);
return {
play: function() {
timer.play();
},
pause: function(){
timer.pause();
}
}
}
});
})(jQuery);
// Another script, available for specific users
(function($){
$(function(){
var $playerButton = $('body').find('button.player'),
$icon = $playerButton.children('i'),
interval;
buttonAction = function(e){
e.preventDefault();
if ($(this).hasClass('playing')) {
interval.pause();
$(this).removeClass('playing').addClass('paused');
$icon.removeClass('glyphicon-pause').addClass('glyphicon-play');
}
else {
interval.play();
$(this).removeClass('paused').addClass('playing');
$icon.removeClass('glyphicon-play').addClass('glyphicon-pause');
}
},
buttonInit = function() {
$playerButton.on('click', buttonAction);
interval = intervalControl();
};
buttonInit();
});
})(jQuery);
Any better suggestion is most welcome.
I have the following script:
var results;
var cursor = 0;
function myFunction () {
$.getJSON('list.php', function(json) {
results = json.result;
cursor = 0;
// Now start printing
printNext();
});
}
function printNext(){
if(cursor == results.length){
// Reset the cursor back to the beginning.
cursor = 0;
}
// Print the key1 in the div.
//$('#device-content-user-text').html(results[cursor].key1);
$('#device-content-user-text').hide('fast', function(){ $('#device-content-user-text').html(results[cursor].key1); $('#device-content-user-text').show('fast'); });
// Set a delay for the current item to stay
// Delay is key2 * 1000 seconds
setTimeout(function(){
printNext();
}, results[cursor].key2 * 1000);
// Advance the cursor.
cursor++;
}
var interval = setInterval(function () {
myFunction();
}, 300000); //make sql query every 5 minutes
and it gets the JSON string from the page list.php and prints the results one by one in a #device-content-user-text div. It is done every five minutes and the timer starts counting time when the user loads the page. How can I invoke this function also on the page load (and then normally every 5 minutes)?
Thanks
Use document.ready() like
$(document).ready(function(){
var interval = setInterval(function () {
myFunction();
}, 300000); //make sql query every 5 minutes
myFunction();
});
Also, if your just calling myFunction inside the anonymous function of setInterval, just pass the function reference itself
$(document).ready(function() {
var interval = setInterval(myFunction, 300000); //make sql query every 5 minutes
myFunction();
});
Update
Depending on what you meant by page 'load', there can be a world of difference between document.ready and load(). If you want to be absolutely sure everything is loaded(including frames, images, etc..) then do
$(window).load(function() {
var interval = setInterval(myFunction, 300000);
myFunction();
});
Otherwise, if it is sufficient that the DOM is ready, just stick with document.ready()
See jQuery - What are differences between $(document).ready and $(window).load?
//Document ready
$(function(){
//call function
myFunction();
//put your interval here
});
I'm trying to create a delay between two loops of the nivo-slider.
Without the setTimeout everything works just fine (but without delay). So the folloing example works:
$('#slider').nivoSlider({
lastSlide: function(){
$('#slider').data('nivo:vars').stop = true;
// setTimeout(function() {
$('#slider').data('nivo:vars').stop = false;
// }, 2000);
},
});
If I uncomment the setTimeout-lines the slider stops but does not start again? Any ideas why?
Update:
http://jsfiddle.net/kgYNX/
2nd update:
Tried it with a wrapping function, too. The function gets called but if I use setTimeout in the new function it stops working: http://jsfiddle.net/kgYNX/1/
Solved it slightly different:
beforeChange: function(){
$('#slider').data('nivo:vars').stop = true;
var delay = 0;
if ($('#slider').data('nivo:vars').currentSlide == $('#slider').data('nivo:vars').totalSlides - 2) {
delay = 2000;
}
setTimeout(function() {
$('#slider').data('nivo:vars').stop = false;
}, delay);
}
I don't know why "totalSlides - 2", but it works: http://jsfiddle.net/kgYNX/15/
As a variant, you may add custom option to slider vars collection to prevent stop execution on lastSlide handler when slider re-enabled by timeout:
lastSlide: function () {
var dontStop = $('#slider').data('nivo:vars').dontStopOnLast;
if (!dontStop) {
$('#slider').data("nivoslider").stop();
setTimeout(function () {
$('#slider').data("nivoslider").start();
}, 2000);
}
$('#slider').data('nivo:vars').dontStopOnLast = !dontStop;
}
I want to trigger an ajax request when the user has finished typing in a text box. I don't want it to run the function on every time the user types a letter because that would result in A LOT of ajax requests, however I don't want them to have to hit the enter button either.
Is there a way so I can detect when the user has finished typing and then do the ajax request?
Using jQuery here!
So, I'm going to guess finish typing means you just stop for a while, say 5 seconds. So with that in mind, let's start a timer when the user releases a key and clear it when they press one. I decided the input in question will be #myInput.
Making a few assumptions...
//setup before functions
var typingTimer; //timer identifier
var doneTypingInterval = 5000; //time in ms, 5 seconds for example
var $input = $('#myInput');
//on keyup, start the countdown
$input.on('keyup', function () {
clearTimeout(typingTimer);
typingTimer = setTimeout(doneTyping, doneTypingInterval);
});
//on keydown, clear the countdown
$input.on('keydown', function () {
clearTimeout(typingTimer);
});
//user is "finished typing," do something
function doneTyping () {
//do something
}
The chosen answer above does not work.
Because typingTimer is occassionaly set multiple times (keyup pressed twice before keydown is triggered for fast typers etc.) then it doesn't clear properly.
The solution below solves this problem and will call X seconds after finished as the OP requested. It also no longer requires the redundant keydown function. I have also added a check so that your function call won't happen if your input is empty.
//setup before functions
var typingTimer; //timer identifier
var doneTypingInterval = 5000; //time in ms (5 seconds)
//on keyup, start the countdown
$('#myInput').keyup(function(){
clearTimeout(typingTimer);
if ($('#myInput').val()) {
typingTimer = setTimeout(doneTyping, doneTypingInterval);
}
});
//user is "finished typing," do something
function doneTyping () {
//do something
}
And the same code in vanilla JavaScript solution:
//setup before functions
let typingTimer; //timer identifier
let doneTypingInterval = 5000; //time in ms (5 seconds)
let myInput = document.getElementById('myInput');
//on keyup, start the countdown
myInput.addEventListener('keyup', () => {
clearTimeout(typingTimer);
if (myInput.value) {
typingTimer = setTimeout(doneTyping, doneTypingInterval);
}
});
//user is "finished typing," do something
function doneTyping () {
//do something
}
This solution does use ES6 but it's not necessary here. Just replace let with var and the arrow function with a regular function.
It's just one line with underscore.js debounce function:
$('#my-input-box').keyup(_.debounce(doSomething , 500));
This basically says doSomething 500 milliseconds after I stop typing.
For more info: http://underscorejs.org/#debounce
Late answer but I'm adding it because it's 2019 and this is entirely achievable using pretty ES6, no third party libraries, and I find most of the highly rated answers are bulky and weighed down with too many variables.
Elegant solution taken from this excellent blog post.
function debounce(callback, wait) {
let timeout;
return (...args) => {
clearTimeout(timeout);
timeout = setTimeout(function () { callback.apply(this, args); }, wait);
};
}
window.addEventListener('keyup', debounce( () => {
// code you would like to run 1000ms after the keyup event has stopped firing
// further keyup events reset the timer, as expected
}, 1000))
Yes, you can set a timeout of say 2 seconds on each and every key up event which will fire an ajax request. You can also store the XHR method and abort it on subsequent key press events so that you save bandwith even more. Here's something I've written for an autocomplete script of mine.
var timer;
var x;
$(".some-input").keyup(function () {
if (x) { x.abort() } // If there is an existing XHR, abort it.
clearTimeout(timer); // Clear the timer so we don't end up with dupes.
timer = setTimeout(function() { // assign timer a new timeout
x = $.getJSON(...); // run ajax request and store in x variable (so we can cancel)
}, 2000); // 2000ms delay, tweak for faster/slower
});
Hope this helps,
Marko
var timer;
var timeout = 1000;
$('#in').keyup(function(){
clearTimeout(timer);
if ($('#in').val) {
timer = setTimeout(function(){
//do stuff here e.g ajax call etc....
var v = $("#in").val();
$("#out").html(v);
}, timeout);
}
});
full example here: http://jsfiddle.net/ZYXp4/8/
Both top 2 answers doesn't work for me. So, here is my solution:
var timeout = null;
$('#myInput').keyup(function() {
clearTimeout(timeout);
timeout = setTimeout(function() {
//do stuff here
}, 500);
});
Declare the following delay function:
var delay = (function () {
var timer = 0;
return function (callback, ms) {
clearTimeout(timer);
timer = setTimeout(callback, ms);
};
})()
and then use it:
let $filter = $('#item-filter');
$filter.on('keydown', function () {
delay(function () {
console.log('this will hit, once user has not typed for 1 second');
}, 1000);
});
Modifying the accepted answer to handle additional cases such as paste:
//setup before functions
var typingTimer; //timer identifier
var doneTypingInterval = 2000; //time in ms, 2 second for example
var $input = $('#myInput');
// updated events
$input.on('input propertychange paste', function () {
clearTimeout(typingTimer);
typingTimer = setTimeout(doneTyping, doneTypingInterval);
});
//user is "finished typing," do something
function doneTyping () {
//do something
}
I like Surreal Dream's answer but I found that my "doneTyping" function would fire for every keypress, i.e. if you type "Hello" really quickly; instead of firing just once when you stop typing, the function would fire 5 times.
The problem was that the javascript setTimeout function doesn't appear to overwrite or kill the any old timeouts that have been set, but if you do it yourself it works! So I just added a clearTimeout call just before the setTimeout if the typingTimer is set. See below:
//setup before functions
var typingTimer; //timer identifier
var doneTypingInterval = 5000; //time in ms, 5 second for example
//on keyup, start the countdown
$('#myInput').on("keyup", function(){
if (typingTimer) clearTimeout(typingTimer); // Clear if already set
typingTimer = setTimeout(doneTyping, doneTypingInterval);
});
//on keydown, clear the countdown
$('#myInput').on("keydown", function(){
clearTimeout(typingTimer);
});
//user is "finished typing," do something
function doneTyping () {
//do something
}
N.B. I would have liked to have just added this as a comment to Surreal Dream's answer but I'm a new user and don't have enough reputation. Sorry!
I don't think keyDown event is necessary in this case (please tell me why if I'm wrong). In my (non-jquery) script similar solution looks like that:
var _timer, _timeOut = 2000;
function _onKeyUp(e) {
clearTimeout(_timer);
if (e.keyCode == 13) { // close on ENTER key
_onCloseClick();
} else { // send xhr requests
_timer = window.setTimeout(function() {
_onInputChange();
}, _timeOut)
}
}
It's my first reply on Stack Overflow, so I hope this helps someone, someday:)
const inText = document.getElementById('inText')
const outText = document.getElementById('outText')
const delay = 1000
let timer
inText.addEventListener('input', code => {
clearTimeout(timer);
timer = setTimeout(x => {
outText.innerHTML = inText.value
}, delay, code)
})
<textarea id='inText'>edit this and...</textarea>
<pre id='outText'>see the results after you stop typing for one second</pre>
Well, strictly speaking no, as the computer cannot guess when the user has finished typing. You could of course fire a timer on key up, and reset it on every subsequent key up. If the timer expires, the user hasn't typed for the timer duration - you could call that "finished typing".
If you expect users to make pauses while typing, there's no way to know when they are done.
(Unless of course you can tell from the data when they are done)
agree with the #going 's answer. Another similar solution that worked for me is the one below. The only difference is that I am using .on("input"...) instead of keyup. This only captures changes in the input. other keys like Ctrl, Shift etc. are ignored
var typingTimer; //timer identifier
var doneTypingInterval = 5000; //time in ms (5 seconds)
//on input change, start the countdown
$('#myInput').on("input", function() {
clearTimeout(typingTimer);
typingTimer = setTimeout(function(){
// doSomething...
}, doneTypingInterval);
});
I was implementing the search at my listing and needed it to be ajax based. That means that on every key change, searched results should be updated and displayed. This results in so many ajax calls sent to server, which is not a good thing.
After some working, I made an approach to ping the server when the user stops typing.
This solution worked for me:
$(document).ready(function() {
$('#yourtextfield').keyup(function() {
s = $('#yourtextfield').val();
setTimeout(function() {
if($('#yourtextfield').val() == s){ // Check the value searched is the latest one or not. This will help in making the ajax call work when client stops writing.
$.ajax({
type: "POST",
url: "yoururl",
data: 'search=' + s,
cache: false,
beforeSend: function() {
// loading image
},
success: function(data) {
// Your response will come here
}
})
}
}, 1000); // 1 sec delay to check.
}); // End of keyup function
}); // End of document.ready
You will notice that there is no need to use any timer while implementing this.
I feel like the solution is somewhat a bit simpler with the input event:
var typingTimer;
var doneTypingInterval = 500;
$("#myInput").on("input", function () {
window.clearTimeout(typingTimer);
typingTimer = window.setTimeout(doneTyping, doneTypingInterval);
});
function doneTyping () {
// code here
}
I just figured out a simple code to wait for user to finish typing:
step 1.set time out to null then clear the current timeout when the user is typing.
step 2.trigger clear timeout to the variable define before keyup event is triggered.
step 3.define timeout to the variable declared above;
<input type="text" id="input" placeholder="please type" style="padding-left:20px;"/>
<div class="data"></div>
javascript code
var textInput = document.getElementById('input');
var textdata = document.querySelector('.data');
// Init a timeout variable to be used below
var timefired = null;
// Listen for keystroke events
// Init a timeout variable to be used below
var timefired = null;// Listen for keystroke events
textInput.onkeyup = function (event) {
clearTimeout(timefired);
timefired = setTimeout(function () {
textdata.innerHTML = 'Input Value:'+ textInput.value;
}, 600);
};
This is the a simple JS code I wrote:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="pt-br" lang="pt-br">
<head><title>Submit after typing finished</title>
<script language="javascript" type="text/javascript">
function DelayedSubmission() {
var date = new Date();
initial_time = date.getTime();
if (typeof setInverval_Variable == 'undefined') {
setInverval_Variable = setInterval(DelayedSubmission_Check, 50);
}
}
function DelayedSubmission_Check() {
var date = new Date();
check_time = date.getTime();
var limit_ms=check_time-initial_time;
if (limit_ms > 800) { //Change value in milliseconds
alert("insert your function"); //Insert your function
clearInterval(setInverval_Variable);
delete setInverval_Variable;
}
}
</script>
</head>
<body>
<input type="search" onkeyup="DelayedSubmission()" id="field_id" style="WIDTH: 100px; HEIGHT: 25px;" />
</body>
</html>
Why not just use onfocusout?
https://www.w3schools.com/jsreF/event_onfocusout.asp
If it's a form, they will always leave focus of every input field in order to click the submit button so you know no input will miss out on getting its onfocusout event handler called.
Multiple timers per page
All the other answers only work for one control (my other answer included).
If you have multiple controls per page (e.g. in a shopping cart) only the last control where the user typed something will get called. In my case this is certainly not the wished behaviour - each control should have its own timer.
To solve this, you simply have to pass an ID to the function and maintain a timeoutHandles dictionary as in the following code:
Function Declaration:
var delayUserInput = (function () {
var timeoutHandles = {};
return function (id, callback, ms) {
if (timeoutHandles[id]) {
clearTimeout(timeoutHandles[id]);
}
timeoutHandles[id] = setTimeout(callback, ms);
};
})();
Function Usage:
delayUserInput('yourID', function () {
//do some stuff
}, 1000);
Here is a solution that fires after 1 second of not typing, but also fires instantly when the input is blank. This is useful when clearing search results after the user deletes the input query. This solution also supports copying and pasting into the search box. The $(() => { ... }); wrapping the top portion of code simply means "do this when the page is loaded" in simple Jquery terms.
var searchTimer;
var searchInterval = 1000;
$(() => {
$('#search-box').on('input', (event) => {
clearTimeout(searchTimer);
searchTimer = setTimeout(() => {
searchContacts(event.target.value);
}, (event.target.value.length > 0) ? searchInterval : 0);
});
});
function searchContacts(val) {
console.log('searching: ' + val);
}
You can use the onblur event to detect when the textbox loses focus:
https://developer.mozilla.org/en/DOM/element.onblur
That's not the same as "stops typing", if you care about the case where the user types a bunch of stuff and then sits there with the textbox still focused.
For that I would suggest tying a setTimeout to the onclick event, and assuming that after x amount of time with no keystrokes, the user has stopped typing.
If there is necessity for the user to move away from the field, we can use "onBlur" instead of Onchange in Javascript
<TextField id="outlined-basic" variant="outlined" defaultValue={CardValue} onBlur={cardTitleFn} />
If that is not necessary setting timer would be the good option.
for alpine.js users <input #input.debounce.500ms="fn()">
Once you detect focus on the text box, on key up do a timeout check, and reset it each time it's triggered.
When the timeout completes, do your ajax request.
If you are looking for a specific length (such as a zipcode field):
$("input").live("keyup", function( event ){
if(this.value.length == this.getAttribute('maxlength')) {
//make ajax request here after.
}
});
Not sure if my needs are just kind of weird, but I needed something similar to this and this is what I ended up using:
$('input.update').bind('sync', function() {
clearTimeout($(this).data('timer'));
$.post($(this).attr('data-url'), {value: $(this).val()}, function(x) {
if(x.success != true) {
triggerError(x.message);
}
}, 'json');
}).keyup(function() {
clearTimeout($(this).data('timer'));
var val = $.trim($(this).val());
if(val) {
var $this = $(this);
var timer = setTimeout(function() {
$this.trigger('sync');
}, 2000);
$(this).data('timer', timer);
}
}).blur(function() {
clearTimeout($(this).data('timer'));
$(this).trigger('sync');
});
Which allows me to have elements like this in my application:
<input type="text" data-url="/controller/action/" class="update">
Which get updated when the user is "done typing" (no action for 2 seconds) or goes to another field (blurs out of the element)
If you need wait until user is finished with typing use simple this:
$(document).on('change','#PageSize', function () {
//Do something after new value in #PageSize
});
Complete Example with ajax call - this working for my pager - count of item per list:
$(document).ready(function () {
$(document).on('change','#PageSize', function (e) {
e.preventDefault();
var page = 1;
var pagesize = $("#PageSize").val();
var q = $("#q").val();
$.ajax({
url: '#Url.Action("IndexAjax", "Materials", new { Area = "TenantManage" })',
data: { q: q, pagesize: pagesize, page: page },
type: 'post',
datatype: "json",
success: function (data) {
$('#tablecontainer').html(data);
// toastr.success('Pager has been changed', "Success!");
},
error: function (jqXHR, exception) {
ShowErrorMessage(jqXHR, exception);
}
});
});
});
Simple and easy to understand.
var mySearchTimeout;
$('#ctl00_mainContent_CaseSearch').keyup(function () {
clearTimeout(mySearchTimeout);
var filter = $(this).val();
mySearchTimeout = setTimeout(function () { myAjaxCall(filter); }, 700);
return true;
});
For passing parameters to your function along with ES6 syntax.
$(document).ready(() => {
let timer = null;
$('.classSelector').keydown(() => {
clearTimeout(timer);
timer = setTimeout(() => foo('params'), 500);
});
});
const foo = (params) => {
console.log(`In foo ${params}`);
}