Develop Reference

Implementing Placeholder solution with jquery

I am trying to use one of the IE9 IE8 placeholder solutions, but i have an error showing in IE9 test setup with the code. The solution i am using is clearly working for many people according to the comments and updates in github, but I have a fundamental problem getting the code recognised.
I have this line in my page header, which should allow me to use jquery. Indeed i am running other jquery functions and they seem to be working:
<!-- Javascript -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
Also in the head i have this (again all the other functions in my myjs.js are showing in developer tools and are available as required):
<!-- my java code link -->
<script src="/js/myjs.js"></script>
The function that i am using for the placeholder solution is this one:
placeholderSupport = ("placeholder" in document.createElement("input"));
if (!placeholderSupport) {
//This browser does not support the placeholder attribute
//use javascript instead
$('[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().parents('form').submit(function() {
$(this).find('[placeholder]').each(function() {
var input = $(this);
if (input.val() === input.attr('placeholder')) {
input.val('');
}
})
});
}
The error that i am getting from IE9 developer tools is this:
Invalid App Id: Must be a number or numeric string representing the application id.
The error is showing on the line of code that looks like this, specifically the dollar sign:
$('[placeholder]').focus(function() {
From my reading I thought that the $ start was a function of the jquery library, which i beleive to be present and working, but i am obviously missing a trick. Can anybody help please. Thanks for any guidance.

Try this code, It works IE8+
UPDATED: to match all inputs and textarea
// This adds 'placeholder' to the items listed in the jQuery .support object.
jQuery(function () {
jQuery.support.placeholder = false;
test = document.createElement('input');
if ('placeholder' in test) jQuery.support.placeholder = true;
});
// This adds placeholder support to browsers that wouldn't otherwise support it.
$(function () {
if (!$.support.placeholder) {
var active = document.activeElement;
$('input,textarea').focus(function () {
if ($(this).attr('placeholder') !== '' && $(this).val() == $(this).attr('placeholder')) {
$(this).val('').removeClass('has-placeholder');
}
}).blur(function () {
if ($(this).attr('placeholder') !== '' && ($(this).val() == '' || $(this).val() == $(this).attr('placeholder'))) {
$(this).val($(this).attr('placeholder')).addClass('has-placeholder');
}
});
$('input,textarea').blur();
$(active).focus();
$('form:eq(0)').submit(function () {
$('input.has-placeholder,textarea.has-placeholder').val('');
});
}
});
Plus CSS
.has-placeholder {
color:#777 /*whatever you like*/
}

Here is the final code using Dippas' answer with the extras to cover textareas and inputs that have type='tel' rather than type='text'. This seems to cover everything on my form, but there might be other input types that need adding at other times. I'm sure that somebody who knows what they are doing can trim this down by sorting out some of the duplicate code.
// This adds 'placeholder' to the items listed in the jQuery .support object.
jQuery(function() {
jQuery.support.placeholder = false;
test = document.createElement('input');
if ('placeholder' in test) jQuery.support.placeholder = true;});
// This adds placeholder support to browsers that wouldn't otherwise support it.
$(function() {
if (!$.support.placeholder) {
var active = document.activeElement;
$('textarea').focus(function() {
if ($(this).attr('placeholder') != '' && $(this).val() == $(this).attr('placeholder')) {
$(this).val('').removeClass('has-placeholder');
}
}).blur(function() {
if ($(this).attr('placeholder') != '' && ($(this).val() == '' || $(this).val() == $(this).attr('placeholder'))) {
$(this).val($(this).attr('placeholder')).addClass('has-placeholder');
}
});
$('textarea').blur();
$(active).focus();
$('form:eq(0)').submit(function() {
$('textarea.has-placeholder').val('');
});
$('input').focus(function() {
if ($(this).attr('placeholder') != '' && $(this).val() == $(this).attr('placeholder')) {
$(this).val('').removeClass('has-placeholder');
}
}).blur(function() {
if ($(this).attr('placeholder') != '' && ($(this).val() == '' || $(this).val() == $(this).attr('placeholder'))) {
$(this).val($(this).attr('placeholder')).addClass('has-placeholder');
}
});
$('input').blur();
$(active).focus();
$('form:eq(0)').submit(function() {
$('input.has-placeholder').val('');
});
}
});

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

Triggering method when element is added to the document

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

$(document).ready() in IE with require.js optimized code

I am having a problem with loading JS in IE. My document ready only runs if press ctrl+r. This is only the case when using the requirejs optimizer and IE. I works in other browsers and in IE if I dont run the optimizer.
require(["jquery", "modals", "registermodule", "bootstrap", "personsmodule"], function($) {
//This is for placeholders in browsers that don't support it.
function createPlaceHoldersForIE(){
if (typeof document.createElement("input").placeholder == 'undefined') {
$('[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().parents('form').submit(function() {
$(this).find('[placeholder]').each(function() {
var input = $(this);
if (input.val() == input.attr('placeholder')) {
input.val('');
}
});
});
}
}
// This will allow $(selector).val().trim(); syntax
String.prototype.trim = function() {
return $.trim(this);
};
$(document).ready(function() {
createPlaceHoldersForIE();
});
});

Change to using the domReady! module.
http://requirejs.org/docs/api.html#pageload
require([
"jquery", "modals", "registermodule",
"bootstrap", "personsmodule", "domReady!"
],
function($){

"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('');
})
});
}
});
/* ]]> */