HTML form - POST or GET depending on button clicked - javascript

Let there be a search form with quite many of the input fields. The user may either click:
[Search] and GET the list of the results,
[Save search criteria] for future use and POST the form content to be stored on server (I'm not interested in storing locally in cookies or so).
How do I achieve that? I've only found solutions to make two types of POST request on two separate buttons.
Maybe a JavaScript onclick function to set <form method="??"> right before its submitted? Would that work?

In HTML5, the <input> element got some new attributes
<input type="submit" formmethod="post" formaction="save.php" value="Save" />
<input type="submit" formmethod="get" formaction="search.php" value="Search" />
The same attributes are valid for <button>

Yes you can change form method before submit form using jquery
<form method="POST" id="myForm">
<button onclick="changeMethod()">submit</button>
</form>
Function changeMethod in jquery
function changeMethod(){
$("#myForm").attr("method", "get");
}

Related

Submit form with Javascript then handle with PHP

Not sure how I did this last time or else I wouldnt asking here but here is what I'm trying to do.
I have the usual basic form with a javascript function that will submit the form. Question is that after the form is submitted, I have an if statement in PHP that echos a that the form has been submitted. Any help would be greatly appreciated.
//PHP
if($_POST['submitDelete']){
echo "welcome, You form has been submitted";
}
//HTML
<form id="form_id" action="" method="POST">
First name: <input type="text" name="fname"><br>
Last name: <input type="text" name="lname"><br><br>
<input type="hidden" name="submitDelete" TYPE="submit">
</form>
<button type="button" onclick="myFunction()">Submit</button>
//JAVASCRIPT
<script>
function myFunction() {
document.getElementById("form_id").submit();
}
</script>
I can't seem to trigger the if statement in PHP. I also tried using the form name in the if statement and that didnt work either.
A form element must be told where to submit its data to when the submit event takes place. This is accomplished by setting the action attribute value for the form. Leaving that attribute empty does not implicitly set the form to post back to the current page. So, if you want to have a single page form/form processor, you need the action to be set to the current page file name:
<form action="currentPageFileName.php" method="post">
Next, there's no reason a single page can't have multiple forms on it. In that case you would need multiple submit buttons, each tied to a specific form. For this reason, you can't just drop a submit button anywhere on the page that you like unless you add the form attribute to the button to tie it back to the form it is supposed to trigger the submit for. Also, if you simply place the submit button within the form element it "belongs" to, you don't have to worry about this.
Also, you have some invalid HTML with:
<input type="hidden" name="submitDelete" TYPE="submit">
An element may not have the same attribute repeated within it (the case that you type the attribute in makes no difference since HTML is not case-sensitive). So, that code would wind up simply creating a submit button.
Lastly, if all you want to do with your submit button is cause its related form to be submitted, there is no need for JavaScript at all. That is what submit buttons do by default.
So, in the end, you can get rid of the JavaScript in your code completely and change your HTML to this:
<form id="form_id" action="currentFileName.php" method="POST">
First name: <input type="text" name="fname"><br>
Last name: <input type="text" name="lname"><br><br>
<input type="hidden" name="submitDelete" value="true">
</form>
<button type="submit" form="form_id">Submit</button>

Submiting one form to two different URLs

Hello, Folks!!
I am not very experience. I would really appreciate some help as follows:
Goal: Run 2 actions associated with 1 submit, just have to add URLs and they will pull out all the necessary info they need from the form.
Constraints: No access to Database, No Ajax and No PHP.
Problem: Nothing happens even when I use <input type="button" value="submit" onclick="OnBtn1(); OnBtn2();">
I also tried these with no luck:
Two onClick actions one button
Submit single form to two actions
HTML Code:
<script type="text/javascript">
function postToUrl () {
document.Form1.action = "https://dB2.com/cgi-bin/b.cgi?"
document.Form1.submit();
}
</script>
<form id=" Form1" method="POST" action="https://dB1.com/cgi-bin/a.cgi?" onsubmit="postToUrl();">
<input type="text" id="field1" name="field1">
<input type="text" id="field2" name="field2">
<input type="button" value="submit" name="sdb">
</form>
Can someone please help me? Thank you!
The best solution would be to use ajax, to send the form twice on the submit event.
Maybe you can try to add a hidden form with mirrored values but different action url. This way, when you submit the form it submit the hidden one too.

submit form by button using form.js plugin

I am using this plugin to submit form with file upload.
Usually my forms are posted (without using this plugint) using:
<button id="send">Send</button>
and using js like this:
$('#send').click(function(){
ajaxSubmit();
});
This plugin is looking for the usual
<input type="submit" value="Send">
to send the form so that I can keep my buttons instead of the default buttons. My point is to update my click function to trigger form submitting via this plugin.
The plugin is initialized via:
$("#myForm").ajaxForm(options);
Any help?
My actual workaround is to style input buttons like my standard buttons but I'd prefer to keep all my code the same way (always using buttons to submit forms instead of inputs)
If you check the documentation, there are multiple ways of submitting the form with that plugin:
<input type="submit" name="submitButton" value="Submit1">
<input type="image" name="submitButton" value="Submit2" src="submit.gif">
<button type="submit" name="submitButton" value="Submit5"><span>submit 5</span></button>
You could use the last one. For that, just add type="submit" to your button, and it should be enough:
<button id="send" type="submit">Send</button>
Without seeing more code, the one thing I can say is that your javascript references an object with an ID of "send" but your input has no ID.
Try <input type="submit" id="send" value="Send"/>.

Best way to form submission without using form action in JavaScript

I am building a PhoneGap application using JavaScript, HTML and jQuery Mobile.
All the HTML is in the same file, separated into <div data-role="page"> as pages.
Several pages have a form including one or more text/selection input and a submit button.
The submit is not a traditional form submit button but a button which using onClick runs a JavaScript function which can do many things.
I want the form to have this features:
When pressing the button and after running the function, clear the form.
In some cases the function should change the page.
The enter button on one of the inputs should submit the form (Activate the function).
Should I use the form HTML tag? If so what should I use for action? How to clear the form?
etc.
If you are trying to bind onClick to an input type="submit" then you're gonna have a bad time.
Unfortunately even if you return false or e.preventDefault when clicking that button, the form still sends the submit trigger so once your onClick code is finished then it will submit.
Example:
<form action="woot.php" method="POST">
<input type="submit" value="submit" onClick="alert('You clicked me! How could you?! It's cool the form will still go to woot.php. return FALSE wont help you either.'); return FALSE;">
</form>
What you probably want to do:
<form action="woot.php" method="POST">
<input type="submit" value="Submit" onSubmit="alert('You aint goin nowhere!'); return FALSE;">
</form>
What you should do:
<form action="woot.php" method="POST">
<input type="button" value="Button" onClick="alert('Away with you!'); window.location = 'http://www.google.com/';">
<input type="button" value="Button" onClick="someCoolFunction();">
</form>
I wouldn't use type="button", especially if you want to have the best chance of the form submitting when the user presses enter.
Use your regular form <input type="submit"> and then your JavaScript:
$('form').submit(function(e) {
// all your form handling here;
if (your_form_was_validated_and_handled) {
$('input[type!="submit"]').val('');
}
e.preventDefault();
});
Generic fiddle: http://jsfiddle.net/
You can still use the form tag, as it's useful for markup.
Just make sure that your buttons have attribute
type="button"
otherwise the button will submit the form by default.
To reset the form:
function resetForm() {
$('#form').each(function(){
this.reset();
});
}

Trigger autocomplete without submitting a form

I am writing a very simple web app with three text inputs. The inputs are used to generate a result, but all the work is done in Javascript, so there is no need to submit a form. I'm trying to find a way to get the browser to store input values for autocomplete as it would if they were in a form that was submitted.
I have tried giving the inputs autocomplete="on" manually, but without a form to submit, the browser has no way of knowing when it should store the values, so this has no effect.
I have also tried wrapping the inputs in a form that has onSubmit="return false;", but preventing the form from actually submitting appears to also prevent the browser from storing its inputs' values.
It is of course possible to manually use localStorage or a cookie to persist inputs and then generate autocomplete hints from those, but I'm hoping to find a solution that taps into native browser behavior instead of duplicating it by hand.
Tested with Chrome, IE and Firefox:
<iframe id="remember" name="remember" class="hidden" src="/content/blank"></iframe>
<form target="remember" method="post" action="/content/blank">
<fieldset>
<label for="username">Username</label>
<input type="text" name="username" id="username" value="">
<label for="password">Password</label>
<input type="password" name="password" id="password" value="">
</fieldset>
<button type="submit" class="hidden"></button>
</form>
In your Javascript trigger the submit, e.g. $("form").submit(); $("#submit_button").click() (updated from comments)
You need to return an empty page at /content/blank for get & post (about:blank didn't work for me but YMMV).
We know that the browser saves its information only when the form is submitted, which means that we can't cancel it with return false or e.preventDefault()
What we can do is make it submit the data to nowhere without reloading a page. We can do that with an iframe
<iframe name="💾" style="display:none" src="about:blank"></iframe>
<form target="💾" action="about:blank">
<input name="user">
<input name="password" type="password">
<input value="Login" type="submit">
</form>
Demo on JSfiddle (tested in IE9, Firefox, Chrome)
Pros over the currently accepted answer:
shorter code;
no jQuery;
no server-side page loaded;
no additional javascript;
no additional classes necessary.
There is no additional javascript. You normally attach an handler to the submit event of the form to send the XHR and don't cancel it.
Javascript example
// for modern browsers with window.fetch
document.forms[0].addEventListener('submit', function (event) {
fetch('login.php', {
method: 'post',
body: new FormData(event.target))
}).then(r => r.text()).then(() => { /* login completed */ })
// no return false!!
});
No-javascript support
Ideally, you should let the form work without javascript too, so remove the target and set the action to a page that will receive your form data.
<form action="login.php">
And then simply add it via javascript when you add the submit event:
formElement.target = '💾';
formElement.action = 'about:blank';
I haven't tested this, but it might work if you submit the form to a hidden iframe (so that the form is actually submitted but the current page is not reloaded).
<iframe name="my_iframe" src="about:blank"></iframe>
<form target="my_iframe" action="about:blank" method="get">...</form>
---WITHOUT IFRAME---
Instead of using iframe, you can use action="javascript:void(0)", this way it doesn't go to another page and autocomplete will store the values.
<form action="javascript:void(0)">
<input type="text" name="firstName" />
<button type="submit">Submit</button>
</form>
Maybe you can use this Twitter Typeahead...is a very complete implementation of a autocomplete, with local and remote prefetch, and this make use of localStorage to persist results and also it show a hint in the input element...the code is easy to understand and if you don't want to use the complete jquery plugin, I think you can take a look of the code to see how to achieve what you want...
You can use jQuery to persist autocomplete data in the localstorage when focusout and when focusin it autocompletes to the value persisted.
i.e.
$(function(){
$('#txtElement').on('focusout',function(){
$(this).data('fldName',$(this).val());
}
$('#txtElement').on('focusin',function(){
$(this).val($(this).data('fldName'));
}
}
You can also bind persistence logic on other events also depending on the your application requirement.
For those who would rather not change their existing form functionality, you can use a second form to receive copies of all the form values and then submit to a blank page before your main form submits. Here is a fully testable HTML document using JQuery Mobile demonstrating the solution.
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<link rel="stylesheet" href="https://code.jquery.com/mobile/1.4.5/jquery.mobile.structure-1.4.5.min.css" />
<script src="https://code.jquery.com/jquery-1.10.2.min.js"></script>
<script src="https://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.min.js"></script>
</head>
<body>
<form method="post">
<input type="text" name="email" />
<input type="submit" value="GO" onclick="save_autofill(this);" />
</form>
<script>
function save_autofill(o) {
$(':input[name]', $('#hidden_form')).val(function () {
return $(':input[name=' + this.name + ']', $(o.form)).val();
});
$('#hidden_form').find("input[type=submit]").click();
}
</script>
<iframe name="hidden_iframe" style="display:none"></iframe>
<form target="hidden_iframe" id="hidden_form" action="about:blank" style="display:none">
<input type="text" name="email" />
<input type="submit" />
</form>
</body>
</html>
The save_autofill function just needs to be called on your main form submit button. If you have a scripted function that submits your form, place that call after the save_autofill call. You must have a named textbox in your hidden_form for each one in your main form.
If your site uses SSL, then you must change the URL for about:blank with https://about:blank.
From what i searched.. it seems you need to identify the names. Some standard names like 'name', 'email', 'phone', 'address' are automatically saved in most browser.
Well, the problem is, browsers handle these names differenetly. For example, here is chrome's regex:
first name: "first.*name|initials|fname|first$"
email: "e.?mail"
address (line 1): "address.*line|address1|addr1|street"
zipcode: "zip|postal|post.*code|pcode|^1z$"
But chrome also uses autocomplete, so you can customize the name and put an autocomplete type, but i believe this is not for custom fields..
Here is chrome's standard
And it's another thing in IE, Opera, and Mozilla. For now, you can try the iframe solution there, so you can submit it. (Maybe it's something semi-standard)
Well, that's all i can help.
Make sure you're submitting the form via POST. If you're submitting via ajax, do <form autocomplete="on" method="post">, omitting the action attribute.
you can use "." in both iframe src and form action.
<iframe id="remember" name="remember" style="display:none;" src="."></iframe>
<form target="remember" method="post" action=".">
<input type="text" id="path" size='110'>
<button type="submit" onclick="doyouthing();">your button</button>
</form>

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