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, Developer Technologies MVP (Microsoft Most Valuable Professional) is the founder and contributor for DevCurry, DotNetCurry and SQLServerCurry. He is the Chief Editor of a Developer Magazine called DNC Magazine. He has also authored two Books - 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);
});});