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jquery.placeholder.js
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jquery.placeholder.js
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/*! http://mths.be/placeholder v2.0.7 by @mathias */
;(
function
(
window
,
document
,
$
)
{
var
isInputSupported
=
'placeholder'
in
document
.
createElement
(
'input'
),
isTextareaSupported
=
'placeholder'
in
document
.
createElement
(
'textarea'
),
prototype
=
$
.
fn
,
valHooks
=
$
.
valHooks
,
hooks
,
placeholder
;
if
(
isInputSupported
&&
isTextareaSupported
)
{
placeholder
=
prototype
.
placeholder
=
function
()
{
return
this
;
};
placeholder
.
input
=
placeholder
.
textarea
=
true
;
}
else
{
placeholder
=
prototype
.
placeholder
=
function
()
{
var
$this
=
this
;
$this
.
filter
((
isInputSupported
?
'textarea'
:
':input'
)
+
'[placeholder]'
)
.
not
(
'.placeholder'
)
.
bind
({
'focus.placeholder'
:
clearPlaceholder
,
'blur.placeholder'
:
setPlaceholder
})
.
data
(
'placeholder-enabled'
,
true
)
.
trigger
(
'blur.placeholder'
);
return
$this
;
};
placeholder
.
input
=
isInputSupported
;
placeholder
.
textarea
=
isTextareaSupported
;
hooks
=
{
'get'
:
function
(
element
)
{
var
$element
=
$
(
element
);
return
$element
.
data
(
'placeholder-enabled'
)
&&
$element
.
hasClass
(
'placeholder'
)
?
''
:
element
.
value
;
},
'set'
:
function
(
element
,
value
)
{
var
$element
=
$
(
element
);
if
(
!
$element
.
data
(
'placeholder-enabled'
))
{
return
element
.
value
=
value
;
}
if
(
value
==
''
)
{
element
.
value
=
value
;
// Issue #56: Setting the placeholder causes problems if the element continues to have focus.
if
(
element
!=
document
.
activeElement
)
{
// We can't use `triggerHandler` here because of dummy text/password inputs :(
setPlaceholder
.
call
(
element
);
}
}
else
if
(
$element
.
hasClass
(
'placeholder'
))
{
clearPlaceholder
.
call
(
element
,
true
,
value
)
||
(
element
.
value
=
value
);
}
else
{
element
.
value
=
value
;
}
// `set` can not return `undefined`; see http://jsapi.info/jquery/1.7.1/val#L2363
return
$element
;
}
};
isInputSupported
||
(
valHooks
.
input
=
hooks
);
isTextareaSupported
||
(
valHooks
.
textarea
=
hooks
);
$
(
function
()
{
// Look for forms
$
(
document
).
delegate
(
'form'
,
'submit.placeholder'
,
function
()
{
// Clear the placeholder values so they don't get submitted
var
$inputs
=
$
(
'.placeholder'
,
this
).
each
(
clearPlaceholder
);
setTimeout
(
function
()
{
$inputs
.
each
(
setPlaceholder
);
},
10
);
});
});
// Clear placeholder values upon page reload
$
(
window
).
bind
(
'beforeunload.placeholder'
,
function
()
{
$
(
'.placeholder'
).
each
(
function
()
{
this
.
value
=
''
;
});
});
}
function
args
(
elem
)
{
// Return an object of element attributes
var
newAttrs
=
{},
rinlinejQuery
=
/^jQuery\d+$/
;
$
.
each
(
elem
.
attributes
,
function
(
i
,
attr
)
{
if
(
attr
.
specified
&&
!
rinlinejQuery
.
test
(
attr
.
name
))
{
newAttrs
[
attr
.
name
]
=
attr
.
value
;
}
});
return
newAttrs
;
}
function
clearPlaceholder
(
event
,
value
)
{
var
input
=
this
,
$input
=
$
(
input
);
if
(
input
.
value
==
$input
.
attr
(
'placeholder'
)
&&
$input
.
hasClass
(
'placeholder'
))
{
if
(
$input
.
data
(
'placeholder-password'
))
{
$input
=
$input
.
hide
().
next
().
show
().
attr
(
'id'
,
$input
.
removeAttr
(
'id'
).
data
(
'placeholder-id'
));
// If `clearPlaceholder` was called from `$.valHooks.input.set`
if
(
event
===
true
)
{
return
$input
[
0
].
value
=
value
;
}
$input
.
focus
();
}
else
{
input
.
value
=
''
;
$input
.
removeClass
(
'placeholder'
);
input
==
document
.
activeElement
&&
input
.
select
();
}
}
}
function
setPlaceholder
()
{
var
$replacement
,
input
=
this
,
$input
=
$
(
input
),
$origInput
=
$input
,
id
=
this
.
id
;
if
(
input
.
value
==
''
)
{
if
(
input
.
type
==
'password'
)
{
if
(
!
$input
.
data
(
'placeholder-textinput'
))
{
try
{
$replacement
=
$input
.
clone
().
attr
({
'type'
:
'text'
});
}
catch
(
e
)
{
$replacement
=
$
(
'<input>'
).
attr
(
$
.
extend
(
args
(
this
),
{
'type'
:
'text'
}));
}
$replacement
.
removeAttr
(
'name'
)
.
data
({
'placeholder-password'
:
true
,
'placeholder-id'
:
id
})
.
bind
(
'focus.placeholder'
,
clearPlaceholder
);
$input
.
data
({
'placeholder-textinput'
:
$replacement
,
'placeholder-id'
:
id
})
.
before
(
$replacement
);
}
$input
=
$input
.
removeAttr
(
'id'
).
hide
().
prev
().
attr
(
'id'
,
id
).
show
();
// Note: `$input[0] != input` now!
}
$input
.
addClass
(
'placeholder'
);
$input
[
0
].
value
=
$input
.
attr
(
'placeholder'
);
}
else
{
$input
.
removeClass
(
'placeholder'
);
}
}
}(
this
,
document
,
jQuery
));
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