I need to copy the text entered in a field (whether it was typed in, pasted or from browser auto-filler) and paste it in another field either at the same time or as soon as the user changes to another field.
If the user deletes the text in field_1, it should also get automatically deleted in field_2.
I've tried this but it doesn't work:
<script type="text/javascript">
$(document).ready(function () {
function onchange() {
var box1 = document.getElementById('field_1');
var box2 = document.getElementById('field_2');
box2.value = box1.value;
}
});
</script>
Any ideas?
You are almost there... The function is correct, you just have to assign it to the change event of the input:
<script type="text/javascript">
$(document).ready(function () {
function onchange() {
//Since you have JQuery, why aren't you using it?
var box1 = $('#field_1');
var box2 = $('#field_2');
box2.val(box1.val());
}
$('#field_1').on('change', onchange);
});
$(document).ready(function() {
$('.textBox1').on('change', function() {
$('.textBox2').val($(this).val());
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text" class="textBox1"/>
<input type="text" class="textBox2"/>
If you are using jQuery, it is very easy - you need just register the right function on the right event :)
Here's the code:
<input id="foo" />
<input id="bar" />
$(function(){
var $foo = $('#foo');
var $bar = $('#bar');
function onChange() {
$bar.val($foo.val());
};
$('#foo')
.change(onChange)
.keyup(onChange);
});
JSFiddle: http://jsfiddle.net/6khr8e2b/
Call onchange() method on the first element onblur
<input type="text" id="field_1" onblur="onchange()"/>
try with keyup event
<input type="text" id="box_1"/>
<input type="text" id="box_2"/>
$('#box_1').keyup(function(){
$('#box_2').val($(this).val());
})
Try something like:
$(document).ready(function () {
$('#field_1').on('change', function (e) {
$('#field_2').val($('#field_1').val());
});
});
Heres a fiddle: http://jsfiddle.net/otwk92gp/
You need to bind the first input to an event. Something like this would work:
$(document).ready(function(){
$("#a").change(function(){
var a = $("#a").val();
$("#b").val(a);
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<input type="text" id="a" />
<input type="text" id="b" />
If you want that the value of the second field is updated as the same time that the first one, you could handle this with a timeout.
Each time a key is pressed, it will execute the checkValue function on the next stack of the execution. So the value of the field1 in the DOM will already be updated when this function is called.
var $field1 = $("#field_1");
var $field2 = $("#field_2");
$field1.on("keydown",function(){
setTimeout(checkValue,0);
});
var v2 = $field2.val();
var checkValue = function(){
var v1 = $field1.val();
if (v1 != v2){
$field2.val(v1);
v2 = v1;
}
};
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<input id="field_1" value=""/><br/>
<input id="field_2" value=""/>
Related
Is it possible to detect the change of a textbox even if that textbox value is not entered by user like the below scenario? I have some scenarios like when the page is loading for the first time the texbox get loaded with data.
$("#txt1").change(function(){
$("#txt2").val("1")
//$("#txt2").change();
});
$('#txt2').on("change", function() {
// some computation will happen here.
alert("1");
});
$("#btn1").click(function(){
$("#txt2").val("1");
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type="text" id="txt1">
<input type="text" id="txt2" name='text1'>
<button id="btn1">
Click
</button>
The value changed by JavaScript does not trigger any event so you just can't catch event in this case.
You can implement a watcher to your input value using interval
var oldValue = $("#txt2").val();
setInterval(function() {
var currentValue = $("#txt2").val();
if (currentValue !== oldValue) {
$("#txt2").trigger("change");
oldValue = currentValue;
}
}, 100);
$("#txt1").change(function(){
$("#txt2").val("1")
});
$('#txt2').on("change", function() {
// some computation will happen here.
alert("1");
});
$("#btn1").click(function(){
$("#txt2").val("1");
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type="text" id="txt1">
<input type="text" id="txt2" name='text1'>
<button id="btn1">
Click
</button>
As you know that on textbox1 change event you are changing second textbox value, you need to trigger it manually
$(document).ready(function () {
$("#txt1").change(function () {
$("#txt2").val("1")
$("#txt2").trigger("change");
});
$("#txt2").change(function () {
alert("1");
});
})
(web designing) whatever the number , i enter in form field, i want that to be stored in a variable. When the user changes the value in the form field , value stored in the variable needs to be updated. How to do that ?
Try this:
<input type = "text" id = "id1">
<script>
$("#id1").change(function(){
var a = $("#id1").val();
alert(a);
});
</script>
there is a jsbin that demonstrates required functionality
jsbin
or
<form>
<input id="input" type="number">
</form>
<button id="button">Log Value</button>
<script>
var input = document.getElementById('input');
var button = document.getElementById('button');
var val;
input.addEventListener('change', function (event) {
val = +event.target.value;
});
button.addEventListener('click', function () {
console.log('Value:', val);
});
</script>
<form>
<input type="text" id="inputid" value="test"/>
<button type="submit">submit</button>
</form>
<script>
$( document ).ready(function() {
var input =$('#inputid');
var saveVar;
// input.change(function(){
// console.log(input.val());
// });
input.on('keyup', function(ev){
saveVar=input.val();
console.log(saveVar);
});
});
</script>
If I change the value of an input field programmatically, the input and change events are not firing. For example, I have this scenario:
var $input = $('#myinput');
$input.on('input', function() {
// Do this when value changes
alert($input.val());
});
$('#change').click(function() {
// Change the value
$input.val($input.val() + 'x');
});
<input id="myinput" type="text" />
<button id="change">Change value</button>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
The problem: The event is triggered when I type in the textfield, but not when I press the button. Is there a way to achieve this with some kind of event or otherwise without having to do it manually?
What I don't want to do: I could go through all my code to add a trigger or function call everywhere manually, but that's not what I'm looking for.
Why: The main reason I would like to do this automatically is that I have a lot of input fields and a lot of different places where I change these inputs programmatically. It would save me a lot of time if there was a way to fire the event automatically when any input is changed anywhere in my code.
Simple solution:
Trigger input after you call val():
$input.trigger("input");
var $input = $("#myinput");
$input.on('input', function() {
alert($(this).val());
});
$('#change').click(function() {
// Change the value and trigger input
$input.val($input.val() + 'x').trigger("input");
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<input id="myinput" type="text" />
<button id="change">Change value</button>
Specific solution:
As mentioned you don't want to trigger input manually. This solution triggers the event automatically by overriding val().
Just add this to your code:
(function ($) {
var originalVal = $.fn.val;
$.fn.val = function (value) {
var res = originalVal.apply(this, arguments);
if (this.is('input:text') && arguments.length >= 1) {
// this is input type=text setter
this.trigger("input");
}
return res;
};
})(jQuery);
See JSFiddle Demo
PS
Notice this.is('input:text') in the condition. If you want to trigger the event for more types, add them to the condition.
There are some ways on how to achieve it. Here, you can use the levelup HTML's oninput() event that occurs immediately when an element is changed and call the function.
<input id="myinput" type="text" oninput="sample_func()" />
<button id="change">Change value</button>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
.
var input = $("#myinput");
function sample_func(){
alert(input.val());
}
$('#change').click(function() {
input.val(input.val() + 'x');
});
Or this jQuery, input thing (just related to above example).
<input id="myinput" type="text" />
<button id="change">Change value</button>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
.
var input = $("#myinput");
input.on("input", function() {
alert(input.val());
});
$('#change').click(function() {
input.val(input.val() + 'x');
});
You can also use javascript setInterval() which constantly runs with a given interval time. It's only optional and best if you're doing time-related program.
<input id="myinput" type="text" />
<button id="change">Change value</button>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
.
var input = $("#myinput");
setInterval(function() { ObserveInputValue(input.val()); }, 100);
$('#change').click(function() {
input.val(input.val() + 'x');
});
jQuery listeners only work on actual browser events and those aren't thrown when you change something programmatically.
You could create your own miniature jQuery extension to proxy this so that you always trigger the event but only have to do in one modular place, like so:
$.fn.changeTextField = function (value) {
return $(this).val(value).trigger("change");
}
Then, just call your new function whenever you want to update your text field, instead of using jQuery's 'val' function:
$("#myInput").changeTextField("foo");
Here's a version working with a proxy function:
<!DOCTYPE html>
<html>
<head>
<title>Test stuff</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.2/jquery.min.js"></script>
</head>
<body>
<input id="myInput" type="text" />
<button id="myButton">Change value</button>
<script type="text/javascript">
$.fn.changeTextField = function (value) {
return $(this).val(value).trigger("change");
}
$( document ).ready(function() {
var $input = $("#myInput");
$input.on("change", function() {
alert($input.val());
});
$('#myButton').click(function() {
$("#myInput").changeTextField("foo");
});
});
</script>
</body>
</html>
For reference, this question has really already been answered here:
Why does the jquery change event not trigger when I set the value of a select using val()?
and here: JQuery detecting Programatic change event
Looks like there's no way, other than using .trigger().
Let's try the same thing using .change() event:
var $input = $("#myinput");
$input.on('change paste keyup', function() {
alert($(this).val());
});
$('#change').click(function() {
$input.val($input.val() + 'x').trigger("change");
});
<input id="myinput" type="text" />
<button id="change">Change value</button>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
Or you need to trigger it manually:
$('#change').click(function() {
$input.val($input.val() + 'x').trigger("input");
});
Snippet
var $input = $("#myinput");
$input.on('input', function() {
alert($(this).val());
});
$('#change').click(function() {
$input.val($input.val() + 'x').trigger("input");
});
<input id="myinput" type="text" />
<button id="change">Change value</button>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
Trigger didn't work for. Creating an event and dispatching with native JavaScript did the work.
Source: https://stackoverflow.com/a/41593131/6825339
<script type="text/javascript">
$.fn.changeTextField = function (value) {
return $(this).val(value).dispatchEvent(new Event("input", { bubbles: true });
}
$( document ).ready(function() {
var $input = $("#myInput");
$input.on("change", function() {
alert($input.val());
});
$('#myButton').click(function() {
$("#myInput").changeTextField("foo");
});
});
</script>
var $input = $('#myinput');
$input.on('input', function() {
// Do this when value changes
alert($input.val());
});
$('#change').click(function() {
// Change the value
$input.val($input.val() + 'x');
});
<input id="myinput" type="text" />
<button id="change">Change value</button>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
$input.val($input.val() + 'x')
$input.trigger('change');
The change event only fire when input blur.
Try this
$('#input').trigger('change');
I want input to enter value number
and When entering the value will be create html node with input inside it
ex
<input>
and when enter value like 3
it will apper
<div><input id='input1-3'><input id='input1-3'><input id='input1-3'></div>
<div><input id='input2-3'><input id='input2-3'><input id='input2-3'></div>
thanx
try this i think it will help you ,
<body>
<input type="text" id='inputnum'>
</body>
jquery,
$(document).ready(function(){
$('#inputnum').on('change',function(){
var a=parseInt($(this).val());
console.log(a);
for(var i=1;i<a+1;i++)
{
var divs='<div>'
for(var j=1;j<a+1;j++)
{
divs=divs+'<input id="input'+i+'-'+j+'">';
}
divs=divs+'</div>';
$('body').append(divs);
}
})
});
Complete JSFiddle Example https://jsfiddle.net/Praveent696/7bt74fbj/
If I correctly understand what you want to do, i think that you just have to use append function like this.
<input id="input1">
<script>
$(document).on("keypress", "input#input1", function() {
var n = this.value;
for (var i=0;i<n;i++){
var x = document.createElement("input");
x.setAttribute("id", "wathever");
document.body.appendChild(x);
}
});
</script>
I'm trying to clear the textfield in html using javscript if the given condition is met. For ex:- if the user types awesome in textfield then it should reset the textfield (no blank space nothing).
<html>
<input type="text" id="real" onkeypress="blank()" placeholder="tempo"/><br>
<script>
function blank(){
if(document.getElementById('real').value=="awesome"){
real.value='';
}
}
</script>
</html>
Here real is undefined, so instead of
...
real.value = '';
...
do this
...
document.getElementById('real').value = '';
...
Use variable real to store input element and use onkeyup event:
function blank() {
var real = document.getElementById('real');
if (real.value == "awesome") {
real.value = '';
}
}
<input type="text" id="real" onkeyup="blank()" placeholder="tempo" />
<br>
Another good example would be:
document.addEventListener('DOMContentLoaded', function() {
var real = document.getElementById('real');
real.addEventListener('keyup', blank, false);
}, false)
function blank() {
if (this.value === "awesome") {
this.value = '';
}
}
<input type="text" id="real" placeholder="tempo" />
<br>
Change the line
real.value=''
to
document.getElementById('real').value = '';
You can't just say "real.value" because javascript doesn't know what "real" is.
<html>
<input type="text" id="real" onkeypress="blank()" placeholder="tempo"/><br>
<script>
function blank(){
var real = document.getElementById('real');
if(real.value=="awesome"){
real.value='';
}
}
</script>
</html>
You where facing issue with input event "onkeypress" if change the event and use "onkeyup"
issue will be resolved.
<html>
<script>
function blank() {
var real = document.getElementById('real');
if (real.value == "awesome") {
real.value = '';
}
}
</script>
<input type="text" id="real" onkeyup="blank()" placeholder="tempo"/><br>
</html>