I have the following input box:
The input box's HTML code is as follows:
<input type="number" min="1" max="50" defaultValue="12"/>
Therefore, my questions are, please:
Is there a way to force the user to use the up and down arrow keys and disallow the user from deleting/modifying the number in the input box directly? If so, how can I do this either in HTML or using React.js?
You can limit the user to the ArrowUp and ArrowDown keys on keydown by checking the KeyboardEvent.key property:
document.getElementById('example').addEventListener('keydown', event => {
if (!['ArrowUp', 'ArrowDown'].includes(event.key)) {
event.preventDefault();
}
});
You can detect keypresses happening in the input box and reject them. The onkeypress event doesn't get triggered by an up or down arrow press in a number input box (at least in chrome).
document.querySelector('#num').onkeypress = function(e){
e.preventDefault();
}
I wouldn't recommend doing this though - there's no guarantee that the user will have a browser the supports the input spinner.
You should instead observe any changes to the input and make sure that the change is triggered correctly.
Try using onKeyPress=this.your_key_eventlister_function() in your input field
then in your function
your_key_eventlistener_function(e){
if(e.key != 'ArrowUp' || e.key !='ArrowDown'){
e.preventDefault();
}
}
I have a form with few inputs and all those inputs are required..I am using bootstrap..
Sample
<input type="email" require="yes">
It works fine it ask for a proper email if it is empty a little warming appears saying wrong email format or this field is required.
All this check happens when the user clicks on submit button... what on the submit button I also want to
add a confirm box like "Are sure ? "...
I added the confirm action using bootbox and it works fine but my problem is that:
When the users click the inputs are checked the warning appears for a second and the confirm box too ... so my problem is that I dont want the confirm box appears unless all the inputs pass the checks ..
Thanks I hope I was clear...
<script src="js/bootbox.min.js"></script>
<script>
// Confirm Box ..
$(document).on("click", ".confirm", function(e) {
bootbox.confirm("Are you sure?", function(result) {
console.log("Confirm result: "+result);
});
});
</script>
<input type="email" placeholder="email" class="contact-input" required="yes">
<button id="contact-input" name="request_meet" class="btn btn-primary confirm">Send</button>
If you add a submit event to your button in javascript you can catch the submit before opening the confirm:
$('form').submit(function(e) {
if (!$('#emailField').val()) {
e.preventDefault();
return false;
}
});
How can I detect that a click event is fired on any checkbox on a page using jQuery? Please also note that on page load, may be checkbox(s) is/are not created but could be created on request. So HTML DOM will be updated in that fashion.
$(":checkbox").on("click", function(){
// your work
} );
also see bind
delegate
live
reference On
TRy this
$( document ).on( "click", "input[type='checkbox']", function() {
alert( "check box clicked" );
});
$(":checkbox").on("click", function(){
// ALL YOUR STUFF
} )
Simply create a function checkboxClick() as -
function checkboxClick() {
// ---
// your code goes here
// ...
}
Now for every checkbox (even when you add them dynamically) add attribute onclick like
<input type="checkbox" onclick="javascript:checkboxClick();" class="checkbox" />
Note : Since javascript works on existing dom elements, even if you do something like jQuery(".checkbox").click(function() {...});, it wont work on dynamicically added elements
$(document).on('click', ':checkbox', function() {
//your code
});
i have a form that i stop from submitting and when confirm message pops up and user clicks yes i want when that happens to submit the form,how can i do that?i tried using fireEvent like this but it wont work...in firebug it says e is undefined.
window.addEvent('domready', function(){
var form=document.adminForm;
form.addEvent('submit', function(e){
var result=confirm("Are you sure!?");
e.stop();
if(result){
form.fireEvent("submit");
}
});
});
you need to stop the event before the confirm and submit after. http://jsfiddle.net/dimitar/qAx6H/
var form=document.id('adminForm');
form.addEvent('submit', function(e){
e && e.stop();
if (confirm('Are you sure?')){
this.submit();
}
});
As far as I understand from your question you want simple confirmation befor submittiong the form. If so, you can use this tiny script:
<input type="submit" OnClick="return confirm('Are you sure!?');" ... />
It will pop-up modal with Ok/Cancel buttons, but works fine for me.
I have a form with several different fieldsets. I have some jQuery that displays the field sets to the users one at a time. For browsers that support HTML5 validation, I'd love to make use of it. However, I need to do it on my terms. I'm using JQuery.
When a user clicks a JS Link to move to the next fieldset, I need the validation to happen on the current fieldset and block the user from moving forward if there is issues.
Ideally, as the user loses focus on an element, validation will occur.
Currently have novalidate going and using jQuery. Would prefer to use the native method. :)
TL;DR: Not caring about old browsers? Use form.reportValidity().
Need legacy browser support? Read on.
It actually is possible to trigger validation manually.
I'll use plain JavaScript in my answer to improve reusability, no jQuery is needed.
Assume the following HTML form:
<form>
<input required>
<button type="button">Trigger validation</button>
</form>
And let's grab our UI elements in JavaScript:
var form = document.querySelector('form')
var triggerButton = document.querySelector('button')
Don't need support for legacy browsers like Internet Explorer? This is for you.
All modern browsers support the reportValidity() method on form elements.
triggerButton.onclick = function () {
form.reportValidity()
}
That's it, we're done. Also, here's a simple CodePen using this approach.
Approach for older browsers
Below is a detailed explanation how reportValidity() can be emulated in older browsers.
However, you don't need to copy&paste those code blocks into your project yourself — there is a ponyfill/polyfill readily available for you.
Where reportValidity() is not supported, we need to trick the browser a little bit. So, what will we do?
Check validity of the form by calling form.checkValidity(). This will tell us if the form is valid, but not show the validation UI.
If the form is invalid, we create a temporary submit button and trigger a click on it. Since the form is not valid, we know it won't actually submit, however, it will show validation hints to the user. We'll remove the temporary submit button immedtiately, so it will never be visible to the user.
If the form is valid, we don't need to interfere at all and let the user proceed.
In code:
triggerButton.onclick = function () {
// Form is invalid!
if (!form.checkValidity()) {
// Create the temporary button, click and remove it
var tmpSubmit = document.createElement('button')
form.appendChild(tmpSubmit)
tmpSubmit.click()
form.removeChild(tmpSubmit)
} else {
// Form is valid, let the user proceed or do whatever we need to
}
}
This code will work in pretty much any common browser (I've tested it successfully down to IE11).
Here's a working CodePen example.
You can't trigger the native validation UI (see edit below), but you can easily take advantage of the validation API on arbitrary input elements:
$('input').blur(function(event) {
event.target.checkValidity();
}).bind('invalid', function(event) {
setTimeout(function() { $(event.target).focus();}, 50);
});
The first event fires checkValidity on every input element as soon as it loses focus, if the element is invalid then the corresponding event will be fired and trapped by the second event handler. This one sets the focus back to the element, but that could be quite annoying, I assume you have a better solution for notifying about the errors. Here's a working example of my code above.
EDIT: All modern browsers support the reportValidity() method for native HTML5 validation, per this answer.
In some extent, You CAN trigger HTML5 form validation and show hints to user without submitting the form!
Two button, one for validate, one for submit
Set a onclick listener on the validate button to set a global flag(say justValidate) to indicate this click is intended to check the validation of the form.
And set a onclick listener on the submit button to set the justValidate flag to false.
Then in the onsubmit handler of the form, you check the flag justValidate to decide the returning value and invoke the preventDefault() to stop the form to submit. As you know, the HTML5 form validation(and the GUI hint to user) is preformed before the onsubmit event, and even if the form is VALID you can stop the form submit by returning false or invoke preventDefault().
And, in HTML5 you have a method to check the form's validation: the form.checkValidity(), then in you can know if the form is validate or not in your code.
OK, here is the demo:
http://jsbin.com/buvuku/2/edit
var field = $("#field")
field.keyup(function(ev){
if(field[0].value.length < 10) {
field[0].setCustomValidity("characters less than 10")
}else if (field[0].value.length === 10) {
field[0].setCustomValidity("characters equal to 10")
}else if (field[0].value.length > 10 && field[0].value.length < 20) {
field[0].setCustomValidity("characters greater than 10 and less than 20")
}else if(field[0].validity.typeMismatch) {
field[0].setCustomValidity("wrong email message")
}else {
field[0].setCustomValidity("") // no more errors
}
field[0].reportValidity()
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type="email" id="field">
Somewhat easy to make add or remove HTML5 validation to fieldsets.
$('form').each(function(){
// CLEAR OUT ALL THE HTML5 REQUIRED ATTRS
$(this).find('.required').attr('required', false);
// ADD THEM BACK TO THE CURRENT FIELDSET
// I'M JUST USING A CLASS TO IDENTIFY REQUIRED FIELDS
$(this).find('fieldset.current .required').attr('required', true);
$(this).submit(function(){
var current = $(this).find('fieldset.current')
var next = $(current).next()
// MOVE THE CURRENT MARKER
$(current).removeClass('current');
$(next).addClass('current');
// ADD THE REQUIRED TAGS TO THE NEXT PART
// NO NEED TO REMOVE THE OLD ONES
// SINCE THEY SHOULD BE FILLED OUT CORRECTLY
$(next).find('.required').attr('required', true);
});
});
I seem to find the trick:
Just remove the form target attribute, then use a submit button to validate the form and show hints, check if form valid via JavaScript, and then post whatever. The following code works for me:
<form>
<input name="foo" required>
<button id="submit">Submit</button>
</form>
<script>
$('#submit').click( function(e){
var isValid = true;
$('form input').map(function() {
isValid &= this.validity['valid'] ;
}) ;
if (isValid) {
console.log('valid!');
// post something..
} else
console.log('not valid!');
});
</script>
Html Code:
<form class="validateDontSubmit">
....
<button style="dislay:none">submit</button>
</form>
<button class="outside"></button>
javascript( using Jquery):
<script type="text/javascript">
$(document).on('submit','.validateDontSubmit',function (e) {
//prevent the form from doing a submit
e.preventDefault();
return false;
})
$(document).ready(function(){
// using button outside trigger click
$('.outside').click(function() {
$('.validateDontSubmit button').trigger('click');
});
});
</script>
Hope this will help you
For input field
<input id="PrimaryPhNumber" type="text" name="mobile" required
pattern="^[789]\d{9}$" minlenght="10" maxLength="10" placeholder="Eg: 9444400000"
class="inputBoxCss"/>
$('#PrimaryPhNumber').keyup(function (e) {
console.log(e)
let field=$(this)
if(Number(field.val()).toString()=="NaN"){
field.val('');
field.focus();
field[0].setCustomValidity('Please enter a valid phone number');
field[0].reportValidity()
$(":focus").css("border", "2px solid red");
}
})
$('#id').get(0).reportValidity();
This will trigger the input with ID specified. Use ".classname" for classes.
When there is a very complex (especially asynchronous) validation process, there is a simple workaround:
<form id="form1">
<input type="button" onclick="javascript:submitIfVeryComplexValidationIsOk()" />
<input type="submit" id="form1_submit_hidden" style="display:none" />
</form>
...
<script>
function submitIfVeryComplexValidationIsOk() {
var form1 = document.forms['form1']
if (!form1.checkValidity()) {
$("#form1_submit_hidden").click()
return
}
if (checkForVeryComplexValidation() === 'Ok') {
form1.submit()
} else {
alert('form is invalid')
}
}
</script>
Another way to resolve this problem:
$('input').oninvalid(function (event, errorMessage) {
event.target.focus();
});