i have one textfield whose id is date. i want to give an dialog boxmsg when textfield is empty. i am tried the following code a lot times but it never going to execute button click function. Why this happen please tell me
var val = $('#date').val();
$(document).ready(function() {
$("#btnSubmit").click(function() {
if (val != null) {
$("#dialog").dialog();
return false;
}
});
});
Move var val = $('#date').val(); inside click handler so that val will always contain the latest value in the #date input.
$(document).ready(function() {
$("#btnSubmit").click(function() {
var val = $('#date').val().trim(); // Remove leading and trailing spaces
// Moved inside click handler
if (!val) { // Check if falsy value
$("#dialog").dialog();
return false;
}
});
});
Looks like your val variable scope is different. So you can try something like:
$(document).ready(function () {
$("#btnSubmit").click(function(){
if ($('#date').val()){
$("#dialog").dialog();
return false;
}
});
});
Something like this? Gets the value when you click and alerts if it's empty?
You need to get the textbox's value when you click, otherwise it will be empty since it's going to be set ONCE, when the page loads.
$(document).ready(function () {
$("#btnSubmit").click(function(){
var textbox = $('#textbox').val();
if (textbox.length == 0){
alert();
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<input id="textbox" type="text" placeholder="Type here"><br>
<button id="btnSubmit">Click me</button>
Related
I have a javascript function that updates the result of a textbox dynamically, then that textbox executes based on that value.
<script>
function updatemykad(mykad) {
$('#asd3').val(mykad);
}
</script>
The textbox loads on, on change, on paste. But it doesn't execute from the dynamically inputted value.
$('input#asd3').bind('input propertychange', function(e) {
console.log(this.value);
var $q = $(this);
if($q.val.length == 12){
....
You have to trigger change function when change value.
<script>
function updatemykad(mykad) {
$('#asd3').val(mykad);
$('input#asd3').trigger("change");
}
</script>
I have a repeater with textboxes ID="txtBomName" in an ascx page with a value retrieved from datatable on pageload.
the end user can change the value, must be not be null/empty.
I have jquery to check if null/empty on change or blur, produce alert if null then I would like the null value set back to original else set value as user entered.
This does work if, I use the generated control ID i.e:
$("#p_lt_ctl02_pageplaceholder_p_lt_zoneMainContent1_BOM_rptBoms_ctl00_txtBomName)"
this obviously only works for the the first textbox on the page, as the "ct100" part of the ID changes for each box.
code:
$(document).ready(function () {
$("#p_lt_ctl02_pageplaceholder_p_lt_zoneMainContent1_BOM_rptBoms_ctl00_txtBomName").change(function () {
var oldVal = this.getAttribute('value');
if (this.value == null || this.value == "") {
alert("Please ensure the name is not empty");
$("#p_lt_ctl02_pageplaceholder_p_lt_zoneMainContent1_BOM_rptBoms_ctl00_txtBomName").val(oldVal);
}
else {
$("#p_lt_ctl02_pageplaceholder_p_lt_zoneMainContent1_BOM_rptBoms_ctl00_txtBomName").val(this.value);
}
});
});
so, I changed the code to look for id$=txtBomName and set an alert to (this.id) the id for each box shows correctly, how can I set the value of the textboxes using (this.id).val(oldVal); ?
You need to use:
$(this).val(oldVal);
'this' is a reference to the current object i.e. textArea the abouve code will set the value of the textArea
Try this code
$(document).ready(function () {
// The simplest way is to save the original value using data() when the
// element gets focus.
$("input[id$='txtBomName']").on('focusin', function(){
$(this).data('val', $(this).val());
});
$("input[id$='txtBomName']").change(function () {
var txtBox=$(this);
var prev = txtBox.data('val');
var current = txtBox.val();
if (current) {
txtBox.val(current);
}
else {
alert("Please ensure the name is not empty");
txtBox.val(prev);
}
});
});
I've got the following code in my web page, where I need to click on the input field and add values using the number pad provided! I use a script to clear the default values from the input when the focus comes to it, but I'm unable to add the values by clicking on the number pad since when I click on an element the focus comes from the input to the clicked number element. How can I resolve this issue. I tried the following code, but it doesn't show the number in the input.
var lastFocus;
$("#test").click(function(e) {
// do whatever you want here
e.preventDefault();
e.stopPropagation();
$("#results").append(e.html());
if (lastFocus) {
$("#results").append("setting focus back<br>");
setTimeout(function() {lastFocus.focus()}, 1);
}
return(false);
});
$("textarea").blur(function() {
lastFocus = this;
$("#results").append("textarea lost focus<br>");
});
Thank you.
The first thing I notice is your selector for the number buttons is wrong
$('num-button').click(function(e){
Your buttons have a class of num-button so you need a dot before the class name in the selector:
$('.num-button').click(function(e){
Secondly, your fiddle was never setting lastFocus so be sure to add this:
$('input').focus(function() {
lastFocus = this;
...
Thirdly, you add/remove the watermark when entering the field, but ot when trying to add numbers to it (that would result in "Watermark-text123" if you clicked 1, then 2 then 3).
So, encalpsulate your functionality in a function:
function addOrRemoveWatermark(elem)
{
if($(elem).val() == $(elem).data('default_val') || !$(elem).data('default_val')) {
$(elem).data('default_val', $(elem).val());
$(elem).val('');
}
}
And call that both when entering the cell, and when clicking the numbers:
$('input').focus(function() {
lastFocus = this;
addOrRemoveWatermark(this);
});
and:
$('.num-button').click(function(e){
e.preventDefault();
e.stopPropagation();
addOrRemoveWatermark(lastFocus);
$(lastFocus).val($(lastFocus).val() + $(this).children('span').html());
});
You'll see another change above - you dont want to use append when appends an element, you want to just concatenate the string with the value of the button clicked.
Here's a working branch of your code: http://jsfiddle.net/Zrhze/
This should work:
var default_val = '';
$('input').focus(function() {
lastFocus = $(this);
if($(this).val() == $(this).data('default_val') || !$(this).data('default_val')) {
$(this).data('default_val', $(this).val());
$(this).val('');
}
});
$('input').blur(function() {
if ($(this).val() == '') $(this).val($(this).data('default_val'));
});
var lastFocus;
$('.num-button').click(function(e){
e.preventDefault();
e.stopPropagation();
var text = $(e.target).text();
if (!isNaN(parseInt(text))) {
lastFocus.val(lastFocus.val() + text);
}
});
Live demo
Add the following function:
$('.num-button').live( 'click', 'span', function() {
$currObj.focus();
$currObj.val( $currObj.val() + $(this).text().trim() );
});
Also, add the following variable to global scope:
$currObj = '';
Here is the working link: http://jsfiddle.net/pN3eT/7/
EDIT
Based on comment, you wouldn't be needing the var lastFocus and subsequent code.
The updated fiddle lies here http://jsfiddle.net/pN3eT/28/
I have a dropdown and I have the jQuery change function.
I would like to implement the change of the selected item as per the Confirmation dialog.
If confirms true i can proceed for selected change otherwise I have keep the existing item as selected and cancel the change event.
How can I implement this with jQuery?
jquery Function
$(function () {
$("#dropdown").change(function () {
var success = confirm('Are you sure want to change the Dropdown ????');
if (success == true) {
alert('Changed');
// do something
}
else {
alert('Not changed');
// Cancel the change event and keep the selected element
}
});
});
One thing to remember change function hits only after selected item changed
So better to think to implement this on onchange - but it is not available in jquery. Is there any method to implement this?
Well, as Vinu has rightly pointed out, jQuery's change event is only triggered once the value of the select has actually been changed. You would be better off doing something like this:
var prev_val;
$('#dropdown').focus(function() {
prev_val = $(this).val();
}).change(function() {
$(this).blur() // Firefox fix as suggested by AgDude
var success = confirm('Are you sure you want to change the Dropdown?');
if(success)
{
alert('changed');
// Other changed code would be here...
}
else
{
$(this).val(prev_val);
alert('unchanged');
return false;
}
});
Something like what I did here?
http://jsfiddle.net/Swader/gbdMT/
Simply save the value as soon as a user clicks the select box, and revert back to this value if the onchange confirmation returns false.
Here is the code from my fiddle:
var lastValue;
$("#changer").bind("click", function(e) {
lastValue = $(this).val();
}).bind("change", function(e) {
changeConfirmation = confirm("Really?");
if (changeConfirmation) {
// Proceed as planned
} else {
$(this).val(lastValue);
}
});
Use following code,I have tested it and its working
var prev_val;
$('.dropdown').focus(function() {
prev_val = $(this).val();
}).change(function(){
$(this).unbind('focus');
var conf = confirm('Are you sure want to change status ?');
if(conf == true){
//your code
}
else{
$(this).val(prev_val);
$(this).bind('focus');
return false;
}
});
Below code is implemented for radio button.I think this code with minor changes can be used for drop down also.
<input type="radio" class="selected" value="test1" name="test1"
checked="checked" /><label>test1</label>
<input type="radio" name="test1" value="test2" /><label>
test2</label>
<input type="radio" name="test1" value="test3" /><label>
test3</label>
</div>
$("input[name='test1']").change(function() {
var response = confirm("do you want to perform selection change");
if (response) {
var container = $(this).closest("div.selection");
//console.log(container);
//console.log("old sel =>" + $(container).find(".selected").val());
$(container).find(".selected").removeClass("selected");
$(this).addClass("selected");
//console.log($(this).val());
console.log("new sel =>" + $(container).find(".selected").val());
}
else {
var container = $(this).closest("div.selection");
$(this).prop("checked", false);
$(container).find(".selected").prop("checked", true);
}
});
As far as I know you have to handle it yourself, this might help:
<select onFocus="this.oldIndex = this.selectedIndex" onChange="if(!confirm('Are you sure?'))this.selectedIndex = this.oldIndex">
Simply do it like
$("#dropdown").change(function () {
var success = confirm('Are you sure want to change the Dropdown ????');
if (success == true) {
// do something
}
else {
return false; // will set the value to previous selected
}
});
Blurring, focusing and storing previous values seems a bit cumbersome. I solved this problem by attaching my listener not to the select, but to the option:
$("#id").on('mousedown','option',confirmChange);
then,
function confirmChange(e){
var value = $(this).val(),
c = confirm('Are you sure you want to change?');
if(c)
$(this).parent().val(value);//can trigger .change() here too if necessary
else
e.preventDefault();
}
Of course optimizations can be done, but this is the general idea.
Trying to learn some jquery to implement an autosave feature and need some assistance. I have some code to monitor the status of form fields to see if there has been any change. Everything works, but I need to only monitor the changes in a specific form, not all form inputs on the page. There is a search box and a newsletter form on the same page and when these form fields are changed, they are detected as well, which I need to filter out somehow or better yet, only target the specific form.
$(function(){
setInterval("CheckDirty()",10000);
$(':input').each(function() {
$(this).data('formValues', $(this).val());
});
});
function CheckDirty()
{
var isDirty = false;
$(':input').each(function () {
if($(this).data('formValues') != $(this).val()) {
isDirty = true;
}
});
if(isDirty == true){
alert("isDirty=" + isDirty);
}
}
Just add a class to the form and use it to filter
$('.form :input').each(function() {
$(this).data('formValues', $(this).val());
});
EDIT
Just a suggestion, you can attach the change event directly to the form
live demo here : http://jsfiddle.net/jomanlk/kNx8p/1/
<form>
<p><input type='text'></p>
<p><input type='text'></p>
<p><input type='checkbox'></p>
</form>
<p><input type='text'></p>
<div id='log'></div>
$('form :input').change(function(){
$('#log').prepend('<p>Form changed</p>')
});
You can easily improve this by adding a timer and making it save every xx seconds.
var $jq= jQuery.noConflict();
$jq(function() { $jq('#extensibleForm').data('serialize',$jq('#extensibleForm').serialize());
});
function formHasChanged(){
if($jq('#extensibleForm').serialize()!=$jq('#extensibleForm').data('serialize')){
alert("Data Changed....");
return (false);
}
return true;
}
what's your form's id?
you just need to make your selector more specific :)
instead of $(':input').each(function() {
use
$('#yourFormId').find(':input').each(function() {
You can use the .change() function and then use $(this) to denote you want to work with just the field that is actively being changed.
$('#myForm input[type="text"]').change(function() {
$(this)...
});
Edit: #myForm is your form ID so you can target a specific form. You can even specify just type="text" fields within that form, as in my example.
Here you can see it working: http://jsfiddle.net/paska/zNE2C/
$(function(){
setInterval(function() {
$("#myForm").checkDirty();
},10000);
$("#myForm :input").each(function() {
$(this).data('formValues', $(this).val());
});
$.fn.checkDirty = function() {
var isDirty = false;
$(this).find(':input').each(function () {
if($(this).data('formValues') != $(this).val()) {
isDirty = true;
}
});
if(isDirty == true){
alert("isDirty=" + isDirty);
}
};
});
I think you can use a class to select the type of input you want.
<input class="savethis" ... />
Then in jQuery use this.
$(':input .savethis').each(function() { ...
You can specify an id attribute (say theForm) to your form element and then select only those input fields inside it.
then try selecting with
$(':input', '#theForm')
I respect all the working answers but for me I think using the focus event might be much better than change event. This is how I accomplished my watchChange() function is JS:
var changeInterval = 0;
var changeLength = 0; //the length of the serverData
var serverData = {value:''}; //holds the data from the server
var fieldLength = 0; //the length of the value of the field we are tracking
var frequency = 10000;
function watchChange() {
$input.on('focus', function() {
var $thisInput = $(this);
//we need the interval value so that we destroy
//setInterval when the input loses focus.
changeInterval = setInterval(function() {
changeLength = serverData.value.length;
fieldLength = $thisInput.val().length;
//we only save changes if there is any modification
if (changeLength !== fieldLength) {
$.ajax({
url: 'path/to/data/handler',
dataType: 'json',
data: "data=" + $thisInput.val(),
method: 'post'
}).done(function(data) {
serverData = data;
}); //end done
} //end if
}, frequency); //end setInterval
//and here we destroy our watcher on the input
//when it loses focus
}).on('blur', function() {
clearInterval(changeInterval);
});
}
Even though this approach seems to be naive but it gave me what I wanted!