The way I've understood it, the tag is used to open and close content like a popup alert. What I fail to understand is what advantages the tag has compared to just using a "div" and styling it with css and adding functionality to it with js. It also seems counter intuitive to manipulate the "open" property in order to show/hide the content instead of using display:none/block; with css.
I also don't understand exactly which scenarios would be considered a dialog box. Is a form login box a dialogbox? What about a popup telling you to disable adblock? Are all popups that can be hidden considered dialog boxes?
The traditional, hacky way to create a dialog, via designing a div via CSS only seems to be intuitive for you because you are used to it. However, you need to implement every functionality related to it, such as:
opening it
closing it
Also, in the future, this will be enhanced by standard functionalities, so, while it's not urgent for already existent code, but when you write code, especially when you start a project, it makes sense to start using it. Let's see an example from [Mozilla's page][1]:
var updateButton = document.getElementById('updateDetails');
var favDialog = document.getElementById('favDialog');
var outputBox = document.querySelector('output');
var selectEl = document.querySelector('select');
var confirmBtn = document.getElementById('confirmBtn');
// "Update details" button opens the <dialog> modally
updateButton.addEventListener('click', function onOpen() {
if (typeof favDialog.showModal === "function") {
favDialog.showModal();
} else {
alert("The <dialog> API is not supported by this browser");
}
});
// "Favorite animal" input sets the value of the submit button
selectEl.addEventListener('change', function onSelect(e) {
confirmBtn.value = selectEl.value;
});
// "Confirm" button of form triggers "close" on dialog because of [method="dialog"]
favDialog.addEventListener('close', function onClose() {
outputBox.value = favDialog.returnValue + " button clicked - " + (new Date()).toString();
});
<!-- Simple pop-up dialog box containing a form -->
<dialog id="favDialog">
<form method="dialog">
<p><label>Favorite animal:
<select>
<option></option>
<option>Brine shrimp</option>
<option>Red panda</option>
<option>Spider monkey</option>
</select>
</label></p>
<menu>
<button value="cancel">Cancel</button>
<button id="confirmBtn" value="default">Confirm</button>
</menu>
</form>
</dialog>
<menu>
<button id="updateDetails">Update details</button>
</menu>
<output aria-live="polite"></output>
However, at the time of this writing (February the 3rd, 2022), this is not supported in all browsers, so it is perfectly feasible to avoid using it for now, until it will become supported everywhere.
[1]: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/dialog
I'm building a website (e-commerce like) with Django.
At some point I display a list of items and for each item there is a form with submit button Order and Quantity picker.
I've implemented filter function that delete the html code of my items list and rebuild it with the matching items with jquery.
The new forms generated by this function do nothing when the submit button is clicked
Here is a part of the code I use in my function (I use an ajax call to generate a json of matching items and then I display them in the table list) :
$.each(code_json, function(index, value){
var string = "<tr id="+ value.material +"><td>"+ value.manufNo +"</td><form method='POST' action='/add_to_cart/"+value.material+"/"+ value.node+"/{{language}}'><td><input type='submit' class='btn' value='Commander' style='color:blue;'></td><td><input id='qty' type='number' name='qty' class='form-control' value='1'></td></form></tr>";
$("#header").after(string);
});
I know that usually with Django you have to add {% csrf_token %} for each form. However it throw an error page usually when missing and here it doesn't show anything
Edit : I tried to bind an onclick event on the submit button dynamically created. In this I did a $.post in jquery to simulate the submit of the form but nothing happend
$(document).on('click', '.btnStandard', function(event) {
console.log($(this).attr('id'));
$.post('/add_to_cart/'+$(this).attr('id'),
{
qty: $("#qty"+$(this).attr('id')).val()
},function(data,status,xhr){
alert("Data : "+data+", status: "+status+", xhr: "+xhr);
});
It print in console $(this).attr('id') but it doesn't do anything else
Thank you for your help
It doesn't explain why I have this problem but I found a workaround to solve my problem.
Instead of dynamically generate forms, I generate them with template and then I hide them all. Later, I make those I need visible when I need thanks to css.
on my html page I do form action after a button has been pressed:
<form action="/example.php" method="POST">
how do I append that url so I can use input from a textbox as well?
what I want to do is redirect user to a specific url
/example.php?id=inputfromtextbox
With php you can directly interpret the value from the textbox that you have just by accessing it with post:
$textVal = $_POST["someInput"];
And even redirect to another page with a constructed url:
header("Location:example2.php?id=$textVal");
But it's not a very good idea, because if you already have the value just use it.
With Javascript you can directly navigate to the url you want when the user submits the form. First you must handle the form submission with the onsubmit event:
<form id="form1" action="/example.php" method="POST" onsubmit="return submitFunc()">
Then in the function you would do:
function submitFunc(){
var textVal = document.getElementById("someInput").value;
var formAction = document.getElementById("form1").getAttribute("action");
window.location.href= formAction + "?id=" + textVal;
return false;
}
The simplest of all would actually be to change the method type to GET which would already encode the form values in the url itself.
I'm currently creating an edit payment method use-case for a website. This is the scenario.
1. There is an edit button for each payment method.
2. When the user clicks on the edit button for a method, a modal will appear for the user to enter in and submit changes for a payment method.
3. The modal will receive the payment method id in order to differentiate which payment method I have to edit.
Currently, I am basing it off of this code.
http://jsfiddle.net/4XJ54/279/
<input type="text" name="bookId" id="bookId" value="" />
As you can see when the user clicks on the button, it reveals the value of data-id. What I need to do is to perform href={data-id}.htm but I don't know how to refer to that value in this way because it is used with the input form instead.
Thanks for your help.
How about this:
$("button.btn-primary").on("click", function (e) {
e.preventDefault();
var _self = $(this);
var myBookId = $(".open-AddBookDialog").attr('data-id',$("#bookId").val());
var $modal=$(".open-AddBookDialog").attr('href');
$(".open-AddBookDialog").attr('href',$("#bookId").val()+".htm");
$($modal).modal('hide');
});
DEMO
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();
});