I am new to java script. I have created an input which is requires the user to input some text to enable the submit button.
<input class="param" name="test" id="test" required ng-model="test">
How can I fill in the input text box using Java Script so I can submit the form (as if the user has entered the text). Currently, when I use for example the following script to update the value, the submit button on the form is not active.
document.getElementById("test").value =1
Could you update the attribute that ng-model is bound to? That should apply the value to the text field correctly.
I have created this example code:
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
function updateValue() {
document.getElementById("test").value = 'test';
}
window.onload = function () {
updateValue();
}
</script>
</head>
<body>
<form action="" method="post">
<input type="text" id="test" name="test" required>
<input type="submit" value="Okay">
</form>
</body>
</html>
This is what Phani Kumar M and Claies were asking for. I tested it on Windows 10 in Firefox 55.0.3 and Chrome 60.0.3112.113. In both browsers it works correctly. The form can be submitted without adding anything to the field.
Others can check other platforms. As mentioned, the required attribute will not work in Safari.
Your problem is somewhere else. I don't know anything about AngularJS, which you seem to be using without even mentioning it, but it might be there.
Related
I am trying to get a hyperlink element to act as a form submit button. This sort of question has been answered multiple times over the years but, for some reason, I am not able to get it to work even with cut-n-pasted code and I'm wondering if I'm missing something trivially simple that my eyes are too bugged out to see. The full code is here:
<html>
<head>
<script language="JavaScript" type="text/javascript">
<!--
function signup() {
alert("Form is " + document.signup_form);
document.signup_form.submit() ;
}
-->
</script>
</head>
<body>
<?php
echo("Submit is [" . $_POST['submit'] . "]");
?>
<form method="post" name="signup_form" id="signup_form" action="" >
<input type="text" name="from_email" placeholder="e-mail address"><br>
<input type="submit" name="submit" value="Send Email">
Sign Up!<br>
</form>
</body>
</html>
The input submit element ("Send Email") works fine. The hyperlink ("Sign Up!") also works fine and calls the javascript function so that the alert() box in the function shows up.
So, it's just the submit() call that's not doing anything--I even printed out document.signup_form in an alert() box to confirm that it's defined (it is). So what am I missing here?
Thanks for any help!
There is a weird thing with how forms work with Javascript - each field is accessible by using formElement.fieldName. Unfortunately, that means that if you name a field input submit, all of a sudden the built-in formElement.submit() function is replaced by your input element. So in your code, document.signup_form.submit() is failing because it is calling the element, not the method, and you can't call an element as a function. See this SO QA for details.
The fix is easy - change:
<input type="submit" name="submit" value="Send Email">
to:
<input type="submit" name="submitBtn" value="Send Email">
Also, as others have noted, you will want to give your form a valid action. Also, in general it might be preferred to access things by id (document.getElementById()) instead of by things like document.signup_form.
Your <form> element is missing a value in it's action attribute. Quoting the specs:
You also have to specify the URL of the service that will handle the
submitted data, using the action attribute
Link here
In one of my webpage i need to add PayPal payment button, in which value has to be entered by input.
i got this script to add PayPal button:
<script
async="async" src="https://www.paypalobjects.com/js/external/paypal-button.min.js?merchant=email#adress.com"
data-button="paynow"
data-amount="5"
data-currency="USD">
</script>
Now i have to change the value of "data-amount" every time by Input from User.
I tried to use onkeyup, setAttribute but both don't seem to work. Please suggest what should i do or where i'm making mistake.
<!DOCTYPE html>
<html>
<script>
function showMe(e) {
var x=e.value;
document.getElementsById("paypal").setAttribute("data-amount", "x");
}
</script>
<body>
Amount: <input type="number" name="amount" id="amount" onkeyup="showMe(this)" required>
<script id="paypal"
async="async" src="https://www.paypalobjects.com/js/external/paypal-button.min.js?merchant=payPalmerchantId"
data-button="paynow"
data-currency="USD">
</script>
<br><br><br>
<p>You will be redirected to Payment Gateway..</p>
</body>
</html>
try this..
function showMe(e) {
var x=e.value;
$("#paypal").attr("data-amount", x);
}
or doing everything in jquery
$("#amount").on('input', function() {
$("#paypal").attr("data-amount", $("#amount").val());
});
I'm not familiar with PayPal scripts, but as I know, such types of embedding set attributes and any other features at step of initializing...
So you have to reload your script.
You could also search for the ability to change attributes with the help of API provided by PayPal
Update:
I've just tried to insert your code into my local page...
Your script searches for element with id "paypal", but if you look at your code after tha page loads, you won't see even "script" tag which refers to the paypal js file. You'll see a form instead. Try to search for "script" word here and you won't find that tag. At least this reason is why your script doesn't work.
I have a page (demo):
<!DOCTYPE html>
<html>
<head>
<title></title>
<script type="text/javascript" src="http://codeorigin.jquery.com/jquery-1.10.2.min.js"></script>
<script type="text/javascript">
$(function() {
$("#id_button").click(function(e) {
$("#id_file").click();
});
});
</script>
</head>
<body>
<form method="post" enctype="multipart/form-data" action="http://www.google.com/">
<input type="file" name="file" id="id_file" />
<input type="button" id="id_button" value="fake button" />
<input type="submit">
</form>
</body>
</html>
if
I open browse dialog via clicking "fake button", select file (I see it in input[type="file"]), than click submit button and no post happens, the input[type="file"] is cleared.
What should I changed to get it work?
I get this problem in IE8 and IE10.
PS: file input will be hidden, so user will work only with fake button.
All of the browsers have different behavior when it comes to what they allow you to do from javascript with regards to programmatically clicking the input button for file inputs.
The best solution I have found that seems to work cross browser is to set the opacity to 0 (do not use display:none) and put the button underneath the input, so the user clicks through the 0 opacity input to your button, thus firing the input select dialog.
A good writeup on styling the file input can be found here: http://www.quirksmode.org/dom/inputfile.html
http://jsfiddle.net/j38Wj Works fine in Google Chrome but does not work in IE 10.
As I think IE does not allow select file by external 'click' event.
Only one way to "customize" input[type=file] is usage of opacity style to hide it and relative positioning of custom button control below it.
Working example: http://blueimp.github.io/jQuery-File-Upload/
[...]
I think all browser does that behaviour for security reason. When you submit a form, you are redirected to a different page(or the same page) and if you are directed to the same page, the form is re-initialized.
In this case, you simply can NOT set the value of file for security reason.
From example, How to set a value to a file input in HTML?, you don't want this happen
<form name="foo" method="post" enctype="multipart/form-data">
<input type="file" value="c:\passwords.txt">
</form>
<script>document.foo.submit();</script>
Add a label tag along with the input file element. Set the 'for' attribute of the label to the id of the input file element.
Then when you click on the label the input file element will 'click' and the file dialog will open.
Then simply style the label however you like. Have tried on various IE versions.
I am currently in the middle of the development of a website. If a user presses a button an javascript function needs to be called. I simplified this function to:
<html>
<head>
<script type="text/javascript">
function newProd(number,customer,software,hardware,name)
{
//I simplified this function
alert('number is: '+number+'customer is: '+customer+' software is: '+software+' hardware is: '+hardware+' name is: '+name);
}
</script>
</head>
<body>
<input type="text" name="textfieldCustomer"><br>
<input type="text" name="textfieldSoftware"><br>
<input type="text" name="textfieldHardware"><br>
<input type="text" name="textfieldDescription"><br>
<input type="button" name="button" value="go to function" onClick="newProd('a number',textfieldCustomer.value,textfieldSoftware.value,textfieldHardware.value,textfieldDescription.value)">
</body>
when the user presses the button in Internet explorer, the function works perfectly! Unfortunately the function does not work in Chrome or Safari.
Does anyone have any idea what is going wrong?
The form fields are not supposed to be defined as global variables. Maybe in IE they are but that's not a behavior you can depend on. Try this:
onClick="newProd('a number',
this.form.textfieldCustomer.value,
this.form.textfieldSoftware.value,
this.form.textfieldHardware.value,
this.form.textfieldDescription.value)">
Oh, and add a form to wrap the inputs of course.
Demo: http://jsfiddle.net/kdUMc/
In my eyes there are two big mistakes in your code. First, the access to inputs fields is wrong. It needs a connection to an instance variable, like 'document'. The second one, the form tag is missing. If you wrap the input fields into a form tag you can access the values as Esailija has posted.
I'm having a strange behaviour with this code:
<script type="text/javascript">
function get()
{
alert("gggg");
jQuery.get (
"http://localhost:8080/c/portal/json_service",
{
serviceClassName: "com.liferay.test.service.TrabajadorServiceUtil",
serviceMethodName: "findByName",
servletContextName: "TrabajadorPlugin-portlet",
serviceParameters: "[param]",
param : document.getElementById("nombre")
}
);
}
</script>
<div>
<form>
<input type="text" id="nombre" value="<%=searching%>"/>
<input type="button" value="Submit" onClick="javascript:get()"/>
</form>
</div>
Liferay portal gets blocked when the button "Submit" is pressed. The pop-up with the message "gggg" is showed, but after click ok on it, the page becomes blocked.
If I remove the line 'param : document.getElementById("nombre")', it doesn't block.
Can anyone explain me where is the error, or the reason of this behaviour?
Thanks in advance,
Rafa
The problem is that you're trying to pass an entire DOM element as the value for param, which jQuery isn't going to like. What type of element has ID nombre, and what property from that element do you want? If it's some kind of input, you likely want the value property, so you'd do:
param : document.getElementById("nombre").value
Updated Answer:
Thinking this through a little more, you should probably do this in a different way altogether. You're sending the data when the user clicks on the submit button, but remember if a user hits enter while typing in the input text box the form will submit but your code will not catch that.
A more robust solution would be to do it this way instead:
<div>
<form id="nombre_search">
<input type="text" id="nombre" value="<%=searching%>"/>
<input type="submit" value="Submit"/>
</form>
</div>
<script type="text/javascript" charset="utf-8">
$(document).ready(function() {
$("#nombre_search").submit(function(){
$.get("http://localhost:8080/c/portal/json_service", {
serviceClassName: "com.liferay.test.service.TrabajadorServiceUtil",
serviceMethodName: "findByName",
servletContextName: "TrabajadorPlugin-portlet",
serviceParameters: "[param]",
param : $("#nombre").val()
});
return false;
});
});
</script>
Changes to your code:
Added an id to the form.
Made the submit button a submit button instead of just a button.
Placed code inside $(document).ready block.
Code runs when form is submitted not when button is clicked.
Hope this helps,
Sandro