Expand a TextBox on Focus using jQuery

Here’s how to animate and expand the height and width of a TextBox when it receives focus. After a delay, the TextBox returns to its normal size

<html xmlns="http://www.w3.org/1999/xhtml">
<
head>
<
title>Expand a TextBox on Focus in jQuery</title>
<
style type="text/css">
.txt
{
width:100px;
height:15px;
}
</style>
<
script type="text/javascript"
src="http://ajax.microsoft.com/ajax/jquery/jquery-1.4.2.min.js">
</
script>

<
script type="text/javascript">
$(function () {
$(".txt").focus(function () {
$(this).animate({
width: '200px',
height: '40px'
},
"slow"
)
.delay(2000)
.animate({
width: '100px',
height: '15px'
},
"slow"
);
});
});
</script>
</
head>
<
body>
<
div>
<
input class="txt" type="text"
value="Some Text Some Text Some Text" /><br />
</
div>
</
body>
</
html>

The code is self explanatory. We first animate the height and width of the TextBox and increase its size. We then set a delay() and then animate the height and width back to what it was earlier.

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About The Author

Suprotim Agarwal
Suprotim Agarwal, ASP.NET Architecture MVP (Microsoft Most Valuable Professional) works as an Architect Consultant and provides consultancy on how to design and develop Web applications.

Suprotim is also the founder and primary contributor to DevCurry, DotNetCurry and SQLServerCurry. He is the Editor of a Developer Magazine called DNC Magazine. He has also written two EBooks 51 Recipes using jQuery with ASP.NET Controls. and The Absolutely Awesome jQuery CookBook

Follow him on twitter @suprotimagarwal

2 comments:

Sarmad said...

can i do this in my blogger post? I dont want the box that is editable by the visitor, rather i want it focus when user points it with cursor.

Timothy1995 said...

This works and its simple http://jsfiddle.net/unknown601/E2KFS/

$(document).ready(function () {
$("input[type=text]").focus(function () {
$(this).animate({
width: "160px"
}, 100);
});
$(this).focusout(function () {
$("input[type=text]").animate({
width: "130px"
}, 100);
});});