I'm trying to detect when a browser places a saved username and password into the input fields. I've looked at this post , but I don't have the option to change this functionality, and the other solutions on don't work.
Basically, I have a disabled login button if the fields are empty on load. But when a browser fills in the input, it doesn't enable the button. I'm trying to find how to see if it changes.
I'm using jQuery and JS.
I've tried .change, on .ready, on .load, and all. It seems to happen after the .load event.
Does anyone know a solution to this? I would like to avoid using any sort of timeout.
I think there is no way to detect if the browser has some buil-in feature that pre-populates the fields.
You could solve the problem with the a timer that enable the button, if something is there.
Something like this:
setInterval(function (){
if($("#username").val()!=""){
$("#loginbutton").attr("enabled","enabled");
}
},1000)
The key thing is that the field will be populated without there having being any keypresses in the field.
So if you trap .keypress on the input field to know if a key is any pressed, then if you get to submitting the form and find there were no keypresses despite a value being there - then you can be somewhat sure that the browser pre-populated it.
If you want to know before submitting (soon after the page loads), you'd want to run a check on an interval that sees if the value has changed despite no key presses.
As #japrescott pointed out, you might want to check for .focus as well in case the user pastes a value in.
Haven't test this, but couldn't you simply compare the default values of each field to the values of each field after the page is loaded (or .2 seconds after the page is loaded if that's an issue)?
Give a shoot to Jquery .live() function
$('.element').live('load', function(){
enableLogin();
});
Related
So I'm working on a chat system and even though I know it works in a pretty lame way - submitting messages in a new window () - I'm interested if there's any way to reset the textarea's content after sending the message.
Now, the problem is, I've even actually found ways to do so via JavaScript (editing the textarea's value), but I don't know how to "launch" the javascript after submitting the form.
Obviously, I can just use onSubmit(), but that delete's the value BEFORE sending the data. So it works, but sends an empty text.
Any ideas?
Thanks!
A common solution is to copy the values of your <form> into an object which you can then convert to JSON. That way, you have a copy of the values which doesn't change when you reset the fields of the form. jQuery will make this very simple. See also: serializing and submitting a form with jQuery POST and php
The second solution is to submit the form and as the last thing, add a timeout which resets the form. But there will be a small gap and a user might be able to type while your handler is clearing the form.
Okay, so I've used a JavaScript timer to run the clearing function 300 ms after clicking the submit button. Works. Thanks all :)
I have been looking for information about this but I don't get with the solution.
I have some text fields on a page which I get updated on blur making use of jQuery events.
There's no form to submit, the update took place in the background using jQuery $.post.
If a user updates those inputs, then clicks on a link to go to another section of the page and then comes back using the browser's back button, those inputs won't show the last values set by the user but the previous ones in case there were, or empty text inputs if there weren't.
Users are reporting this as a bug (even is more a browser behavior), and I wonder if there is any solution for this.
I have been taking a look at things like this or this, but they don't solve the problem I have. I have no forms, I have no submit and I don't want to reset the form.
I've noticed this problem doesn't take place in IE 9 and either in Firefox but it does on Chrome.
The user can navigate to different pages (more than 30) with more than 12 text fields in each and therefor I have discarded the idea of storing them on sessions.
Is there any way to solve it?
Thanks.
I do not know if my solution can solve you're problem , but:
what if you bind data to you're input? e.g you can set dinamically data on input
$('input').data( 'val' , $(this).val());
and then re-bind it through
$('input').val( $(this).data() ) ;
Do not follow exactly these lines of code , I'm trying to give you an idea of what I'm wondering. I hope that it can help you.
http://api.jquery.com/data/ doc for .data()
I am developing a form using Javascript for styling that will be used to submit many different things. However, the majority of the time the different things will only be slightly different so it would really benefit users if when you press the Back button on the browser, the form is exactly as you left it before you submitted the form.
Note: This already works when using a normal HTML/Javascript-less form, the question I am asking is how I can retain this functionality when using Javascript to hide/replace input fields etc.
I've tried History.js and HTML5's replaceState() but nothing seems to work. Also if it helps, this will be a private website that requires the latest browser installed so don't feel hesitant to recommend solutions only available in the latest browser releases.
Many thanks!
Update #1: Here's an image better explaining what I need.
Update #2: Okay I managed to crack it perfectly, cross-browser included. I'll post a solution tomorrow after I've had some sleep.
Okay so I went back to the drawing board and tried to figure something out using the tools I already know exist. The case with each browser (usually, haven't tested any non-major browsers) is that when you press the Back button after submitting a form, text input fields are usually populated. I wanted to see if this worked the same with hidden input fields, turns out it does!
So next I set up some Javascript events to listen out for the page load.
if($.browser.mozilla)
{
$(window).on('pageshow', pageManager.init);
}
else
{
$(pageManager.init);
}
This works for Chrome, Firefox and IE9. I haven't tested any other browsers but these are the only browsers that will be used for my private site so it's good enough for me. I'm sure you can set up your own preferred solution for your needs but this is what worked best for me.
Anyway the above code means every time the page loads, pageManager.init() will run. Here's an excerpt of the code I use to check if the Back button was pressed and it's not simply just a page refresh or a first-time visit:
if($('input[name="form_submitted"]').val() != '')
{
// back button was pressed
}
As you can see, it's as simple as checking if your hidden form field contains a value. To actually guarantee a value will be set, make sure to set on submission of your form:
$('#my-form').submit(function()
{
$('input[name="form_submitted"]').val('true');
}
It really is as simple as that. This is one of the best methods I can think of for determining if the Back button of a browser was pressed. Now, to cache all the form values for the visible fields it can be as simple as using JSON.stringify() on the fields and sticking it all in one hidden field which you decode later.
AFAIK, this is generally handled manually. That is, you use hashtags or pushState (with appropriate state object) and either on hash change or on popstate you grab the hash/state, and (re)build your DOM as needed.
(note, I combined two very different scenarios into one there, sorry. if you were only using hash changes, you wouldn't likely be using pushState, as pushState doesn't trigger onhashchange according to MDN.)
I have a dynamic form which depending on the value in a pull down selection field will either show or hide a form fieldset.
e.g. Do you wish to get a quote just now? [YES/NO]
This works fine the way it is at the moment however there is a limitation when the user refreshes the form and the value is still intact however the changes that should have made an effect on the document are not shown. i.e. it is reset to its original state
The only way to remedy this is to redo the selection in that form field i.e. (reclick Yes/No).
Is there anyway I can workaround this problem? Perhaps a seperate javascript that checks the value of that field?
How would you tackle it?
Thanks
A refresh reinitialises the page so will reset everything that the browser doesn't remember for you. The only way would be to store the value in a session/cookie and read it each time the page is loaded to check if the fieldset should be shown on hidden.
when I load the touch Facebook login page in the webview, I want that the email field to be set to a value and it can't be modified and to accomplish that I have inserted a JavaScript code in the webview disabling that element. All works fine until I want to click the login button because the page refreshes instead of submit the login info. I've noticed that if I don't disable the item, the login button works fine but I don't know why occurs that.
What can be the problem? I've thought another way to make it works: Whenever the user try to modify the email field ignore whatever he do, but I think this is a less proffesional way to fix that.
Regards.
You can use jQuery to bind to the keypress event for the field, then use event.which to scan for keyInput and discard all charcodes. Then the field is not disabled, it just wont accept input.
I've not be able to disable the element and send the info, so I've chosen the other way, not allow the user to input anything with the parameter readOnly instead disabled. It's easier than the Mech Software's answer, althougt thank you for your answer.