Is there any event raised before the validation of fields in an HTML5 form and before the submit of this form?
AFAIK, the submit event is raised just before the submit of the form, but after the validation step, so this one fires too late for me.
Update: I have a textarea with the "required" property, and if the user has JS I want to substitute it by an HTML editor. The HTML editor syncs its contents with the textarea on submit (after the validation step), so for the browser the textarea is always empty. That's why I'm asking for an event fired before the validation. Any other way answer that solves this problem will be accepted.
No, there is no event which fires before validation happens. There is only the invalid event, which is fired after validation of an invalid field, but before the validation UI is shown (preventing the default prevents showing the browser validation UI).
In case you want to sync two fields, you have to use two events. The first is DOMContentReady and the second is the change event.
Additional info: if you hide the invalid field element, the browser can not show the validation message to the user. You can workaround this with the following code (note this assumes that you are using jQuery 1.6x and a special structure):
$('textarea.wysiwyg').bind('invalid', function(e){
//remove validation bubble
e.preventDefault();
//implement your own validation UI
$(this).next('div.wysiwyg').after('<p class="error">'+ $.prop(this, 'validationMessage') +'</p>');
});
Related
I am creating reports using Jasper right now and almost everything goes well. We set it in a way that if the user will preview a report, the report(pdf) will be shown on a new Tab. The problem is if an error occurs, a new Tab would still be opened instead of just showing the Feedback Panel on the original page.
How can the form be setup in such a way that the feedback panel will be shown on the original page instead of the newly opened Tab?
Form<?> form = new Form<Void>("form");
form.add(new AttributeAppender("target", Model.of("_blank")));
SubmitLink view= new SubmitLink("view") {
#Override
public void onSubmit() {
//code inside a try-catch to generate the report using Jasper}
};
CptiDownloadButton download = new CptiDownloadButton("download", new AbstractReadOnlyModel<File>(){
//CptiDownloadButton extends SubmitLink button and is a modification of Mr Ivaynberg's DownloadLink
};
<form wicket:id="form">
<input type="button" wicket:message="value:search"/>
<input type="button" wicket:message="value:download"/>
</form>
Thanks in advance to anyone who'll answer. ^^
If you do any form submission to a form with target="_blank", the browser will automatically open a new tab to render the response from the form submission. It is the intended behavior, and trying to prevent it is breaking the standard target="_blank" behavior. I guess what I'm saying is you should really think whether breaking this standard behavior is something you want to do.
If it is, here's how I would go about it. Warning: ain't gonna be clean.
Use Ajax (AjaxButton or AjaxFormSubmitBehavior) to submit the form. Since it is done via ajax, the browser will not invoke default form submission behavior, hence not opening a new tab.
Ajax then invokes the form processing. On error, re-render the feedback panel and return. On success append JavaScript to invoke the default form submission on the respective link when the request returns. This will perform standard form submission behavior, hence performing the target="_blank". It will once more validate the form, but then it will proceed to perform the originally intended behavior.
The way you invoke the default form submission on the link you desire can be done in a few different ways and is entirely up to you. As a quick and dirty way you can hide the buttons that you have right now (visually) and perform javascript to click the button. Or you can use a hidden form field to identify which button has been clicked if you don't want ugly hidden clicking behavior.
You'll have to do a form (Ajax)-submit without target, and then initiate the actual download after checking possible errors.
See https://cwiki.apache.org/confluence/display/WICKET/AJAX+update+and+file+download+in+one+blow for an example with Ajax and an attachment content disposition.
I trying to add some fields to form depending of checkbox. But I have no idea how can I do that. I think Ajax can be useful, but I dont work with Ajax in Symfony2 yet, and if my form build up not in the controller what value I need specify in url: option of Ajax?
That's quite a broad question, but essentially: the Symfony way is to add them to the Form in the Controller by reacting to FormEvents.
Symfony Docs on Form Events
One way to achieve what you're after is to submit the form twice - the first time code will react to the checked checkbox and arrange the rest of the form as required, the second time the form will be valid and you can take action. Details on the above link. AJAX might help with this, allowing a form submission as soon as you've checked the checkbox.
Although you can create HTML form fields using AJAX, when you submit the form those fields need to exist in the Form object. You can add them just in time, in the controller, before Symfony tries to bind them.
My angular application needs to submit a form to a vendor. They then redirect the user to a page that I specified earlier in the process.
So I want standard, non-angular html form submit behaviour.
The documentation (details below) makes it sound like all I need to do is add an action attribute to my form element. I have tried this and it does not work.
Has anyone used this functionality in angular? Is there another step that I am missing?
The relevant section of the documentation at https://docs.angularjs.org/api/ng/directive/form is:
Submitting a form and preventing the default action
Since the role of forms in client-side Angular applications is different than in classical roundtrip apps, it is desirable for the browser not to translate the form submission into a full page reload that sends the data to the server. Instead some javascript logic should be triggered to handle the form submission in an application-specific way.
For this reason, Angular prevents the default action (form submission to the server) unless the element has an action attribute specified.
Angular does that. When you provide an action on the form, it should do exactly what you're trying to do (do a javascript thing, then submit the form).
Here is a plunk
In the plunk, you can see the $scope.submitted say 'submitted' just before the form submission kicks the page over to the submitted.html
I am dealing with html5 forms and I have a field with a required attribute set. When the user wants to submit the form, chrome displays the validation message, that the field must not be empty. Strangely, this message seems to slip under the other html markup. I dont think I have any css set that could cause this.
Is this a bug or am I missing something?
http://www.abload.de/img/errorogbcv.png
the html5 validation message was cut off/ under the dom due to overflow:hidden.
I have a very simple form with a single autocomplete widget. No submit button. I would like the form to act in such a way that it submits the form when the user selects a suggestion from the autocomplete, but does not submit otherwise. The problem is, the form automatically submits, filled in or not, whenever I press enter. However, if I add a hidden text input box, it resolves the issue, and I can only submit the form by selecting a suggestion from the autocomplete (submission via this mechanism is handled by some jQuery). Is there a more 'graceful' way of turning off the submit-on-return feature? Adding a hidden text input that I don't actually need definitely does not seem like the 'proper' way to do this and is probably a browser-dependent fix anyways (I'm using Chrome).
The "submit on enter" is a browser specific implementation. So I don't think there is anything we can do from JS to turn it off.
You might be able to force the issue by listening to "keypress" event in jQuery, but that seems heavy handed.
Another way you could possibly approach this (in theory, never done this) is using HTML5 Data attributes. i.e. on your form, have
<form data-ready="false">
</form>
Then set that attribute to "true" when you've selected your suggestion item.
In your Form submit handler, check for that attribute before deciding to allow form submission, or use .preventDefault() to stop it from submitting to server.