Triggering method when element is added to the document

Triggering method when element is added to the document - javascript

I am trying to implement a placeholder feature for IE.
So far I have got the following code:
if(!$.support.placeholder) {
$('#closestStaticParent').on('focus', '[placeholder]' function() {
var input = $(this);
if (input.val() == input.attr('placeholder')) {
input.val('');
input.removeClass('placeholder');
}
}).on('blur', '[placeholder]' function() {
var input = $(this);
if (input.val() == '' || input.val() == input.attr('placeholder')) {
input.addClass('placeholder');
input.val(input.attr('placeholder'));
}
}).blur();
}
So it adds the placeholder on blur and the code blurs every element with placeholder.
The issue now is that only initially loaded elements blurs. If I load textfields with ajax, they do not trigger blur().
How do I make so that new textfields initiate blur() on themselves when they are added to the document (loaded)?
PS. Please no answers with time-interval-based or ajax-success re-checks.

change $('#closestStaticParent') to $('body') if the elements you are creating are not a child of closestStaticParent

Related

What does that select in jquery

I am reading this code:
and I am wondering what does that $('[placeholder]') selector do?
<script>
$(document).ready(function() {
if (!Modernizr.input.placeholder) {
$('[placeholder]').focus(function() {
var input = $(this);
if (input.val() == input.attr('placeholder')) {
input.val('');
input.removeClass('placeholder');
}
}).blur(function() {
var input = $(this);
if (input.val() == '' || input.val() == input.attr('placeholder')) {
input.addClass('placeholder');
input.val(input.attr('placeholder'));
}
}).blur();
$('[placeholder]').parents('form').submit(function() {
$(this).find('[placeholder]').each(function() {
var input = $(this);
if (input.val() == input.attr('placeholder')) {
input.val('');
}
})
});
}
</script>

It selects all elements with a placeholder attribute.
Also, please do not use this code. It will not work properly e.g. in case of JS using .val() to get the field's value. It also won't allow the user to enter a value that's equal to the placeholder string. There are better scripts out there, e.g. this one: https://github.com/diy/jquery-placeholder

How to bind javascript to all related elements?

I am trying to make a placeholder to work on IE. The issue is that my page loads some elements via Ajax, but Javascript is loaded only once. Therefore the Ajax loaded input fields do not have placeholders (because those elements were not loaded when the Javascript executed).
I was trying to make it so that the script is bind to all input text elements with placeholder and not just to currently loaded, but I am not sure what am I doing wrong.
if(!$.support.placeholder) {
$('[placeholder]').on('focus', function() {
var input = $(this);
if (input.val() == input.attr('placeholder')) {
input.val('');
input.removeClass('placeholder');
}
}).on('blur', function() {
var input = $(this);
if (input.val() == '' || input.val() == input.attr('placeholder')) {
input.addClass('placeholder');
input.val(input.attr('placeholder'));
}
}).blur();
}

Try this
if(!$.support.placeholder) {
$('#closestStaticParent').on('focus', '[placeholder]' function() {
var input = $(this);
if (input.val() == input.attr('placeholder')) {
input.val('');
input.removeClass('placeholder');
}
}).on('blur', '[placeholder]' function() {
var input = $(this);
if (input.val() == '' || input.val() == input.attr('placeholder')) {
input.addClass('placeholder');
input.val(input.attr('placeholder'));
}
}).blur();
}

val() returns Placeholder value instead of the actual value in IE8,9 when the field is empty

Placeholder attribute shown below works fine in firefox but if val() is called when the field is empty it returns the placeholder value instead of the actual value in the text.
JSFiddle - http://jsfiddle.net/Jrfwr/2/
<input id="tlt" type="text" placeholder="Enter Title" />
JSCode
function placeHolderFallBack() {
if ("placeholder" in document.createElement("input")) {
return;
}
else {
$('[placeholder]').focus(function () {
var input = $(this);
if (input.val() == input.attr('placeholder')) {
input.val('');
input.removeClass('placeholder');
}
}).blur(function () {
var input = $(this);
if (input.val() == '' || input.val() == input.attr('placeholder')) {
input.addClass('placeholder');
input.val(input.attr('placeholder'));
}
}).blur();
$('[placeholder]').parents('form').submit(function () {
$(this).find('[placeholder]').each(function () {
var input = $(this);
if (input.val() == input.attr('placeholder')) {
input.val('');
}
})
});
}
}

You could override the val() method but I don't like doing that :D
I wrote a simple pVal() function which does the job
$.fn.pVal = function(){
var $this = $(this),
val = $this.eq(0).val();
if(val == $this.attr('placeholder'))
return '';
else
return val;
}
$(function(){
alert($('input').val())
alert($('input').pVal())
});
http://jsfiddle.net/W7JKt/3/

In your JSFiddle code you get the value of the textbox in a BUTTON CLICK event... and your code that checks if the current value of the textbox is equal to the placeholder executes in the FORM SUBMIT event.
So... the problem is that the BUTTON's CLICK event executes before the FORM's SUBMIT event.
This code shows an example of how to get the correct value
Hope that helps.

Its to do with HTML 5. Please see this article.
http://www.cssnewbie.com/cross-browser-support-for-html5-placeholder-text-in-forms/

"Password" gets displayed as "********" in IE for placeholder

I am using HTLM5 placeholder and added modernizr.js to make it work in IE. The code segment is :
<input type="password" placeholder="Password">
function hasPlaceholderSupport() {
var input = document.createElement('input');
return ('placeholder' in input);
}
$(document).ready(function(){
if(!Modernizr.input.placeholder){
$('[placeholder]').focus(function() {
var input = $(this);
if (input.val() == input.attr('placeholder')) {
input.val('');
input.removeClass('placeholder');
}
}).blur(function() {
var input = $(this);
if (input.val() == '' || input.val() == input.attr('placeholder')) {
input.addClass('placeholder');
input.val(input.attr('placeholder'));
}
}).blur();
$('[placeholder]').parents('form').submit(function() {
$(this).find('[placeholder]').each(function() {
var input = $(this);
if (input.val() == input.attr('placeholder')) {
input.val('');
}
})
});
}
});
It is working fine for other browser and i want to display the text for input type password in IE but instead it puts the placeholder in the masking characters. How can the "Password" text be displyed.

The problem is that your placeholder fallback script is using the field's value to show the placeholder.
Password fields, of course, hide their value, so this technique will fail on password fields in exactly the way you described.
What you need is a placeholder script which works by writing the placeholder text into an extra element which is overlaid on top of the field (or behind it if the field's background is transparent). The script can then alter this element, rather than altering the field's value.
There are a whole load of scripts available which do exactly this - this one, for example (but there are many others too).
The other option is to dynamically change the field type from password to text and back again whenever the placeholder is toggled. This might be a quicker win to fit into your existing code, but I'd recommend using the other technique instead for the long term.
Hope that helps.

Try using this code... I hope it will help you.
/* <![CDATA[ */
$(function () {
var input = document.createElement("input");
if (('placeholder' in input) == false) {
$('[placeholder]').focus(function () {
var i = $(this);
if (i.val() == i.attr('placeholder')) {
i.val('').removeClass('placeholder');
if (i.hasClass('password')) {
i.removeClass('password');
this.type = 'password';
}
}
}).blur(function () {
var i = $(this);
if (i.val() == '' || i.val() == i.attr('placeholder')) {
if (this.type == 'password') {
i.addClass('password');
this.type = 'text';
}
i.addClass('placeholder').val(i.attr('placeholder'));
}
}).blur().parents('form').submit(function () {
$(this).find('[placeholder]').each(function () {
var i = $(this);
if (i.val() == i.attr('placeholder'))
i.val('');
})
});
}
});
/* ]]> */

Showing Placeholder text for password field in IE

I know there is a ton of placeholder questions, but I am trying to perfect mine.
My current code works great and does what it's supposed to. The problem is, when I go to place the "password" placeholder, it puts the placeholder in the masking characters. Any ideas on how to get around that?
$(function() {
if(!$.support.placeholder) {
var active = document.activeElement;
$(':text').focus(function () {
if ($(this).attr('placeholder') != '' && $(this).val() == $(this).attr('placeholder')) {
$(this).val('').removeClass('hasPlaceholder');
}
}).blur(function () {
if ($(this).attr('placeholder') != '' && ($(this).val() == '' || $(this).val() == $(this).attr('placeholder'))) {
$(this).val($(this).attr('placeholder')).addClass('hasPlaceholder');
}
});
$(':text').blur();
$(active).focus();
$('form').submit(function () {
$(this).find('.hasPlaceholder').each(function() { $(this).val(''); });
});
var active = document.activeElement;
$(':password').focus(function () {
if ($(this).attr('placeholder') != '' && $(this).val() == $(this).attr('placeholder')) {
$(this).val('').removeClass('hasPlaceholder');
}
}).blur(function () {
if ($(this).attr('placeholder') != '' && ($(this).val() == '' || $(this).val() == $(this).attr('placeholder'))) {
$(this).val($(this).attr('placeholder')).addClass('hasPlaceholder');
}
});
$(':password').blur();
$(active).focus();
$('form').submit(function () {
$(this).find('.hasPlaceholder').each(function() { $(this).val(''); });
});
}
});
My field for the pass:
<div id="loginform_pass"><input class="login" tabindex="2" type="password" placeholder="Password" name="password" maxlength="30"></div>

You could also try this... it detects that the browser does not have support for placeholder and works for all input types
function FauxPlaceholder() {
if(!ElementSupportAttribute('input','placeholder')) {
$("input[placeholder]").each(function() {
var $input = $(this);
$input.after('<input id="'+$input.attr('id')+'-faux" style="display:none;" type="text" value="' + $input.attr('placeholder') + '" />');
var $faux = $('#'+$input.attr('id')+'-faux');
$faux.show().attr('class', $input.attr('class')).attr('style', $input.attr('style'));
$input.hide();
$faux.focus(function() {
$faux.hide();
$input.show().focus();
});
$input.blur(function() {
if($input.val() === '') {
$input.hide();
$faux.show();
}
});
});
}
}
function ElementSupportAttribute(elm, attr) {
var test = document.createElement(elm);
return attr in test;
}

Could you just swap out the original text field with a password field?
$('#pass').focus(
function(){
var pass = $('<input id="pass" type="password">');
$(this).replaceWith(pass);
pass.focus();
}
);
<input id="pass" type="text" value="Passowrd">
http://jsfiddle.net/UrNFV/

I ran into this problem with IE before. Here's my solution :)
http://jsfiddle.net/mNchn/

If I'm understanding this right, you want the field to say "Password" when nothing has been typed into it; however, "Password" gets displayed as "********".
A decent fix to that (which also degrades gracefully, depending on how you code it) is to:
Put a LABEL before the password INPUT. Set the LABEL's text to "Password", and set its for attribute to point to the INPUT's ID, so that the INPUT is focused when the LABEL is clicked.
Use CSS to position the LABEL on top of the INPUT, so that they overlap, and it looks like "Password" is inside of the INPUT.
Make it so that the LABEL is only visible when some CSS class (.showMe, for example) is applied to it.
Use JavaScript to hide the LABEL
...if the INPUT's value is an empty string
...or if the user has selected (focused) the INPUT.

Depending on whether or not you want to be able to dynamically change the text inside the placeholder, your simplest solution might be to have the placeholder text be an image.
input {
background: url(_img/placeholder.png) 50% 5px no-repeat;
.
.
.
}
input:focus {
background: none;
}
Clearly there are many different ways of using this method, and you will have to use some kind of a fix to get :focus to work on the browsers that don't support it.

Here my plugin :
if(jQuery.support.placeholder==false){
// No default treatment
$('[placeholder]').focus(function(){
if($(this).val()==$(this).attr('placeholder'))
$(this).val('');
if($(this).data('type')=='password')
$(this).get(0).type='password';
});
$('[placeholder]').blur(function(){
if($(this).val()==''){
if($(this).attr('type')=='password'){
$(this).data('type','password').get(0).type='text';
}
$(this).val($(this).attr('placeholder'));
}
}).blur();
}

I had the same problem so i wrote a little plugin
$.fn.passLabel = function(){
var
T = $(this),
P = T.find('input[type=password]'),
V = pass.val();
P.attr('type','text');
P.focus(function(){
if(V == "")
P.attr('type','password');
});
}
now you just call it for the from at it will find all input fields with the password
attribute.
eg.
$('form').passLabel();

A bit late however same here, i was working on the issue too IE9 doesnot show the password placeholder as text, in almost all the answers on the internet some suggest changing the type some but if u do this u will have another issue on the login page like when you will see with double click on password field as its type changed to text from password, btw it works with prop. e.g. prop("type","password") if you want to change the type of an element.
on the other hand i think most answers come from a single solution its like focus and blur actions of elements. but when u apply this plugin other text fields will also be effected there is no specific or i can say generlized solution, i have still a minor issue on the login page with the password field but its showing the text correctly. anyway. here is how i have configured, copied,changed and/or another inherited anwers here.
(function($) {
$.fn.placeholder = function() {
$('input[placeholder], textarea[placeholder]').focus(function() {
var input = $(this);
if (input.val() === input.attr('placeholder')) {
if (input.prop("id") === "password") {
input.prop("type", "password");
}
input.val('');
input.removeClass('placeholder');
}
}).blur(function() {
var input = $(this);
if (input.val() === '' || input.val() === input.attr('placeholder')) {
input.addClass('placeholder');
if (input.prop("type") === "password") {
input.prop("type", "text");
}
input.val(input.attr('placeholder'));
}
}).blur().parents('form').submit(function() {
$(this).find('input[placeholder], textarea[placeholder]').each(function() {
var input = $(this);
if (input.val() === input.attr('placeholder')) {
input.val('');
}
});
});
};
})(jQuery);
still an active prolem ... :D

Develop Reference

JavaScript is the programming language of the Web.

Triggering method when element is added to the document - javascript

change $('#closestStaticParent') to $('body') if the elements you are creating are not a child of closestStaticParent

Related

What does that select in jquery

How to bind javascript to all related elements?

val() returns Placeholder value instead of the actual value in IE8,9 when the field is empty

"Password" gets displayed as "********" in IE for placeholder

Showing Placeholder text for password field in IE

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