I am trying to add value to a text field in a web view using javascript. First, I add value using this code :
webView.evaluateJavaScript("document.getElementById('birds').value = 'username';", completionHandler:nil)
second I need to press Enter button to run next function. Here is text input's info:
<input type="text" name="submit" id="birds" placeholder="Write username or name and press enter" "="" class="ui-autocomplete-input" autocomplete="off">
How can I programmatically trigger enter button?
Just select the form and call submit
document.getElementById("myForm").submit();
This article could be worth a read though, you may need to select the submit button and call the onClick method instead, it depends how that particular form handles sending it's data.
I'm simply trying to get the value of an input box embedded in a form tag.
For example, this works just fine.
<div>
<label>First Name</label>
<input id="firstName" type="text" required />
</div>
<button type="submit" onclick="getName()">Submit</button>
<script type="text/javascript">
function getName() {
var name = document.getElementById('fistName').value;
console.log(name);
}
</script>
This outputs whatever value is enter in the console when the submit button is clicked. However if I put it in a form like below it doesn't return anything.
<form>
<div>
<label>First Name</label>
<input id="firstName" type="text" required />
</div>
<button type="submit" onclick="getName()">Submit</button>
</form>
Does the form tag add some protection? How can I get the value out of an input tag inside a form?
it doesn't return anything
Yes it does.
However, since you're submitting a form, the page is also immediately refreshing and you're starting over from scratch.
The form isn't "protecting" anything. The code is doing exactly the same thing in both cases. But in the second case the form is also doing something else (loading the page) before you've physically had time to see the result.
Button of type submit refreshes the page. Also the console gets cleared. So it does output but gets immediately cleared. Try changing the button type to "button". Then it will not refresh the page and you will see the output.
I have a page with multiple small forms on it. Each form has one input field that has an onchange function which will submit it's form to a url that returns a no data status.
Things work fine, submitting form after form, until the user clicks on a small form that has ONLY a submit button in it. This click works, but abandons the change in the previous field resulting in its onchange not firing the click at the bottom of the changed function fails (still trying to understand the firebug trace).
What's going on? is there a fix for my structure?
UPDATE:
First I tried simply delaying the action of the submit, but no luck.
I have hidden the and added an <input button> to the chain of "events" so that the focus has a place to come to rest before the real submit tries to happen -- the code below has been updated. So the question now becomes:
Is this as simple as it can be?
Script:
$(function() {
$('input,select').change(changed);
});
function changed(){
...
$(this).parents('form').find(':submit').click();
}
function doSubmit(elt, id)
{
$(elt).focus();
setTimeout(function(){
$(id).click();
}, 400);
}
One of may small forms:
<form class="clean" method="POST" action="QuoteProApp.php">
<input type="submit" value="field" name="btn_update" style="display: none;">
<input type="hidden" value="000242" name="quote_id">
<input type="text" maxlength="15" size="3" value="" name="q[cost][4][1][unit]">
</form>
The offending click goes into this form:
<form class="clean" method="POST" action="QuoteProApp.php">
<input type="hidden" value="000242" name="quote_id">
<input type='button' name='btn_close' value='Close' onclick='doSubmit(this,"#CLOSE");'>
<input id='CLOSE' type='submit' name='btn_close' value='Close' style='display:none;'>
</form>
Might be totally irrelevant, but your selector for the change event includes your submit input too. Can you change it to:
$('input[type="text"],select').change(changed);
to see if anything changes?
The solution turned out to be to create a button tag, set the focus explicitly to a it, and then set a timeout to click the real, but hidden, submit input tag. This allows the change in focus to run the submit associated with it and then continue with the explicit submit of the page.
The question has been updated to show this solution.
I have a form with an input text field which imports data every couple of seconds and display it in the form field , let us say :
<input name="code" id="code" type="text" size="64" maxlength="128" />
and a submit button and my form has the formname form1.
I want the submit button to be clicked as soon as the data in the form field is changed.
I did try to do the following. In the header I did add the follwoing javascript:
<SCRIPT LANGUAGE="javascript">
function send_data()
{
document.form1.submit();
}
</SCRIPT>
and on the form :
<input name="code" id="code" type="text" size="64" maxlength="128" onchange="send_data();" />
but it didn`t work..
Any help ?
Thanks
Something like this would work:
<form action="#">
<input type="" id="input" />
<button type="submit"></button:>
</form>
<script>
function send_data() {
document.forms[0].submit();
}
window.onload = function(){
var input = document.getElementById('input');
input.onchange = send_data;
}
</script>
But I'd add a few caveats:
I'm assuming there is only one form on the page. You would be safer assigning and ID to your form and using getElementById and referencing that instead of document.forms[x]
The change event will only happen after you lose focus on the input, which I probably what you want? Just making sure it's expected behavior
Without knowing why you need to do this, I'd note that it could potentially be very annoying to the user, as submission will trigger a new page load. You may be better off doing a submission via ajax so as not to disrupt the user's browsing. If you do this, I strongly recommend a JS library to handle this.
I'm working on a simple javascript login for a site, and have come up with this:
<form id="loginwindow">
<strong>Login to view!</strong>
<p><strong>User ID:</strong>
<input type="text" name="text2">
</p>
<p><strong>Password:</strong>
<input type="password" name="text1"><br>
<input type="button" value="Check In" name="Submit" onclick=javascript:validate(text2.value,"username",text1.value,"password") />
</p>
</form>
<script language = "javascript">
function validate(text1,text2,text3,text4)
{
if (text1==text2 && text3==text4)
load('album.html');
else
{
load('failure.html');
}
}
function load(url)
{
location.href=url;
}
</script>
...which works except for one thing: hitting enter to submit the form doesn't do anything. I have a feeling it's cause I've used "onclick" but I'm not sure what to use instead. Thoughts?
Okay yeah so I'm well aware of how flimsy this is security-wise. It's not for anything particularly top secret, so it's not a huge issue, but if you guys could elaborate on your thoughts with code, I'd love to see your ideas. the code i listed is literally all I'm working with at this point, so I can start from scratch if need be.
There are several topics being discussed at once here. Let's try to clarify.
1. Your Immediate Concern:
(Why won't the input button work when ENTER is pressed?)
Use the submit button type.
<input type="submit".../>
..instead of
<input type="button".../>
Your problem doesn't really have anything to do with having used an onclick attribute. Instead, you're not getting the behavior you want because you've used the button input type, which simply doesn't behave the same way that submit buttons do.
In HTML and XHTML, there are default behaviors for certain elements. Input buttons on forms are often of type "submit". In most browsers, "submit" buttons fire by default when ENTER is pressed from a focused element in the same form element. The "button" input type does not. If you'd like to take advantage of that default behavior, you can change your input type to "submit".
For example:
<form action="/post.php" method="post">
<!--
...
-->
<input type="submit" value="go"/>
</form>
2. Security concerns:
#Ady mentioned a security concern. There are a whole bucket of security concerns associated with doing a login in javascript. These are probably outside of the domain of this question, especially since you've indicated that you aren't particularly worried about it, and the fact that your login method was actually just setting the location.href to a new html page (indicating that you probably don't have any real security mechanism in place).
Instead of drudging that up, here are links to related topics on SO, if anyone is interested in those questions directly.
Is there some way I can do a user validation client-side?
Encrypting Ajax calls for authentication in jQuery
3. Other Issues:
Here's a quick cleanup of your code, which just follows some best practices. It doesn't address the security concern that folks have mentioned. Instead, I'm including it simply to illustrate some healthy habits. If you have specific questions about why I've written something a certain way, feel free to ask. Also, browse the stack for related topics (as your question may have already been discussed here).
The main thing to notice is the removal of the event attributes (onclick="", onsubmit="", or onkeypress="") from the HTML. Those belong in javascript, and it's considered a best practice to keep the javascript events out of the markup.
<form action="#" method="post" id="loginwindow">
<h3>Login to view!</h3>
<label>User ID: <input type="text" id="userid"></label>
<label>Password: <input type="password" id="pass"></label>
<input type="submit" value="Check In" />
</form>
<script type="text/javascript">
window.onload = function () {
var loginForm = document.getElementById('loginwindow');
if ( loginwindow ) {
loginwindow.onsubmit = function () {
var userid = document.getElementById('userid');
var pass = document.getElementById('pass');
// Make sure javascript found the nodes:
if (!userid || !pass ) {
return false;
}
// Actually check values, however you'd like this to be done:
if (pass.value !== "secret") {
location.href = 'failure.html';
}
location.href = 'album.html';
return false;
};
}
};
</script>
Put the script directly in your html document. Change the onclick value with the function you want to use. The script in the html will tell the form to submit when the user hits enter or press the submit button.
<form id="Form-v2" action="#">
<input type="text" name="search_field" placeholder="Enter a movie" value=""
id="search_field" title="Enter a movie here" class="blink search-field" />
<input type="submit" onclick="" value="GO!" class="search-button" />
</form>
<script>
//submit the form
$( "#Form-v2" ).submit(function( event ) {
event.preventDefault();
});
</script>
Instead of <input type="button">, use <input type="submit">. You can put your validation code in your form onsubmit handler:
<form id="loginwindow" onsubmit="validate(...)">
it's because it's not a form submitting, so there's no event to be triggered when the user presses enter. An alternative to the above form submit options would be to add an event listener for the input form to detect if the user pressed enter.
<input type="password" name="text1" onkeypress="detectKey(event)">
Maybe you can try this:
<form id="loginwindow" onsubmit='validate(text2.value,"username",text1.value,"password")'>
<strong>Login to view!</strong>
<p><strong>User ID:</strong>
<input type="text" name="text2">
</p>
<p><strong>Password:</strong>
<input type="password" name="text1"><br>
<input type="submit" value="Check In"/>
</p>
</form>
As others have pointed out, there are other problems with your solution. But this should answer your question.
Surely this is too unsecure as everyone can crack it in a second ...
-- only pseudo-secure way to do js-logins are the like:
<form action="http://www.mySite.com/" method="post" onsubmit="this.action+=this.theName.value+this.thePassword.value;">
Name: <input type="text" name="theName"><br>
Password: <input type="password" name="thePassword"><br>
<input type="submit" value="Login now">
</form>
My Thought = Massive security hole. Anyone can view the username and password.
More relevant to your question: - You have two events happening.
User clicks button.
User presses enter.
The enter key submits the form, but does not click the button.
By placing your code in the onsubmit method of the form the code will run when the form is submitted. By changing the input type of the button to submit, the button will submit the form in the same way that the enter button does.
Your code will then run for both events.