I have a simple Registration form and I want to make an option like there are two different fields, and what i want is simple, just when I add text to the first field it should automatically be added the same content to the next field.
$("#field1").change(function(){
$("#field2").val(this.value);
});
Demo: http://jsfiddle.net/DerekL/CcDv4/
$(function(){
$('#txt1').on('change', function(e){
$('#txt2').val($(this).val());
});
});
DEMO.
The change event only fires when 2 conditions are met:
The element loses focus;
The element has a different value property than when it got focus.
If you want the text to change as you type it, you can use jQuery together with the HTML5 input event:
//assuming `a` and `b` as text field IDs
$('#a').on('input', function() {
$('#b').val($(this).val());
});
JSFiddle
For non-HTML5 browsers, you can just extend the events map to simulate the input event:
$('#a').on('input keydown keypress keyup change blur', function() {
$('#b').val($(this).val());
});
JSFiddle
Give onchange event for first field and assign value for second field,as below
onchange="secondfieldname.value=firstfieldnamefieldname.value"
Related
Trying to have it so when a link is clicked aside one input, it will hide that link and focus to the input field in the next div. I need to reference it with an event-target for other reasons.
If I change .focus(); to .val('blah'); it works, and other, more typical methods i.e. $('a').click(function() {... will do the job. Is this just a limitation of using event-target?
Here is a fiddle
Your mousedown event does'nt trigger the handler, you'll need to use click() instead.
Something like this FIDDLE
I'm using labels for my form, like this :
<label for="foo" id="bar">Label</label>
<input type="checkbox" id="foo" />
I want to hide an element when the user uncheck the box, and show it otherwise.
The problem is, if I bind the click event to "foo", it'll only works when the user clicks on the checkbox itself and not on the label. Therefore, do I also need to bind a click event on the label ? Or should I enclose both elements within a span ?
My HTML already contains 2344 elements, so I'd like to do it without adding anything, and without doubling the JavaScript code or the selector, if possible.
Instead of binding with the click() event, you should bind using the change() event, then however this change is triggered the outcome will be the same:
$('#foo').change(
function(){
// do whatever
});
References:
change().
The change event should fire for the input whether the label or input is clicked:
$("#foo").change(function () { ... });
Example http://jsfiddle.net/andrewwhitaker/6LMXW/
I want to check if user changes the value of a textbox. If the user changes the value, then I want to display the changed value in a different textbox.
jquery has an event for this, .change(), this event will detect content changes when the textbox looses focus.
If you are wanting to detect the change at every keypress, .keyup() and .keydown() might be better suited for your needs.
Examples for your intended use:
//just change '.change' to '.keyup' or '.keydown' the rest is the same.
$('input').change(function() {
$('target').val(this.value);
});
can I use blur in a hidden field in jquery? if not, how can I track changes in a hidden field
Hidden field is hidden, it won't be visible to a user to change something. Only page author/script can change its value and if that is the case, you can use the change event to track changes.
$('#hidden_id').change(function(){
alert('Changed Value: ' + $(this).val());
});
NO, you can't in it's normal behavior.
The onchange event occurs when a control loses the input focus (blur) and its value has been modified since gaining focus.
http://www.w3.org/TR/html401/interact/scripts.html#adef-onchange
But you can do it as Sarfraz suggested. Add onchange event then explicitly trigger it every time you change the value of the hidden typed input
The 'change()' event handler doesn't work on hidden input fields. What you can do instead is something along these lines (untested!):
function hiddenOnChange(elem, function) {
if ($(elem).val()!=$(elem).getAttr('oldVal')) {
function;
}
$(elem).attr('oldVal', $(elem).val());
window.setTimeout(function(){hiddenOnchange(elem, function);}, 100);
}
Call this function with your hidden input field and the onchange function. It re-creates the onchange function by comparing the field's "current" value with a previously stored value. If nothing is changed, it re-checks in 100 msecs; If something did change, it will execute your function (I hope ;))
Hope this helps.
I am trying to alert something whenever a drop-down box changes and whenever something is typed into an input. I don't think I can use change for input fields? What would you use for input fields? Also, what about input fields of type file? Same thing. Here is what I have so far and it's not working:
$('input#wrapper, select#wrapper').change(function(){
alert('You changed.');
});
You can bind a keypress event to the text box.
$("#wrappertext").bind("keypress", function(){
// your code
});
In your sample you have used the same id for the text box and the select box. Change this also.
when ever something is typed into an
input
change() happens in input type text happens when the value is change on blur...
try keyup() or keydown() instead.