I'm trying to create a form in which the submit button is disabled until the text matches my conditions. And I'd like to constantly (each time a character is typed) check the text, instead of having to create a button that will activate another one.
Thanks !
You can use jquery and keyup to detect every time that the user type something here is an example:
http://jsfiddle.net/82sTJ/253/
<input type="text" id="text">
<button type="submit" disabled id="submitButton">
Submit
</button>
var condition = "good";
$('#text').keyup(function(event) {
if($('#text').val() == condition) {
$("#submitButton").prop('disabled', false);
}else{
$("#submitButton").prop('disabled', true);
}
});
Here is the alternative way using input suggested by Rob:
var condition = "good";
$('#text').on("input", function(event) {
if($('#text').val() == condition) {
$("#submitButton").prop('disabled', false);
}else{
$("#submitButton").prop('disabled', true);
}
});
Also you can use something like vue.js or angular to check the value in real time.
*Edited
This question already has answers here:
Prevent users from submitting a form by hitting Enter
(36 answers)
Closed 6 years ago.
I have an html form with some input fields in it, one of the input field is search field, when I click the search button next to this search input field, search results will be returned from server using ajax, what I want is to prevent form submission when user focuses on this specific search input field and hit enter. By the way, I'm using AngularJS, so solution might be a bit different from JQuery or pure javascript way I think.. Do-able? Any advice would be appreciated!
Use a function like:
function doNothing() {
var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
if( keyCode == 13 ) {
if(!e) var e = window.event;
e.cancelBubble = true;
e.returnValue = false;
if (e.stopPropagation) {
e.stopPropagation();
e.preventDefault();
}
}
<form name="input" action="http://www.google.com" method="get">
<input type="text" onkeydown="doNothing()">
<br><br>
<input type="submit" value="Submit">
</form>
JSFIDDLE HERE
In the button click handler do a e.preventDefault()
function clickHandler(e){
e.preventDefault();
}
You can also use a button instead of a submit button.
When you submit form using enter key on particular text fields or submit button(focus).
To prevent form submit twice, we can use both approach
1.
define var isEnterHitOnce=true globally which loaded at the time of form load
on keyPress Event or on submitForm()
if(event.keycode==13 && isEnterHitOnce){
isEnterHitOnce=false;
//Process your code. Sent request to server like submitForm();
}
isEnterHitOnce=false;
2.
disable the field object from where you received the action like
beginning of method in formSubmit()
document.getElementById(objName).disabled=true; // objName would be your fields name like submitButton or userName
//At the end of method or execution completed enable the field
document.getElementById(objName).disabled=false;
I have several input fields text on my page:
<input type="text">
The form is submitted when I press ENTER in some of them, which is what I don't want.
What can cause such behavior?
I triple checked and I do not have submit buttons (actually I do not have any buttons at all)
You could use a bit of Javascript placed in the head section of your HTML page to disable submission on enter clicked in an input field:
<script type="text/javascript">
function stopRKey(evt) {
var evt = (evt) ? evt : ((event) ? event : null);
var node = (evt.target) ? evt.target : ((evt.srcElement) ? evt.srcElement : null);
if ((evt.keyCode == 13) && (node.type=="text")) {return false;}
}
document.onkeypress = stopRKey;
</script>
You are probably submitting some of your forms via ajax calls in which you prevent the default browser behavior. That is why some of your forms are not submitted when you hit the enter.
To make sure all of your forms do not submit when enter is pressed, you can bind a custom function to all of your forms which detects when enter key is pressed. In this function you can prevent the default browser behavior.
$('form').keydown(function(e){
if(e.keyCode === 13) {
e.preventDefault();
return false;
}
});
Example Fiddle here.
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();
});
I have a form with several submit buttons. I want my last button to handle the submit rather than the HTML5 spec'ed first button.
I can't change the html at this point and am fairly sure this requires JS. But when I've given it a shot I've gotten into nasty loops or dead code trying to prevent default behaviour and then fire my other button.
Has anyone done this before? jQuery is on the page if needed.
Thanks,
Denis
Since you mentioned jQuery :)
If all you want to do is submit your form when a user presses the enter key, then
$(function() {
$('body').keypress(function(e) {
if (e.which == 13) {
e.preventDefault();
$('#myForm').submit();
}
});
});
However, if you have different behavior/forms depending on which button is clicked and you want the enter key to trigger your last button's click event, then
$(function() {
$('body').keypress(function(e) {
if (e.which == 13) {
e.preventDefault();
$('input[type="submit"]:last').click();
}
});
});
You should just change the input element's type attribute to button instead when you don't want it to submit the form. (I know you said you can't really change the HTML, but this is the best way)
<input type="button" name="mybutton" class="submit-button" value="I wont submit!" />
jQuery code:
$('.submit-button').click(function() {
$('#secret-value-field').val($(this).val());
$(this).parents('form').submit();
});
Or something along those lines.