Input expand is a jQuery plug-in for creating an expanded text box that automatically expands to the right when it is focused or clicked.

auto expand input width based on text length, input width auto resize css, textarea grow with content

Onclick Stylish Expanding Search Box in HTML CSS Code

How to make use of it:

1. Load the latest version of the jQuery library and jQuery Extensible Input Plugin into your document.

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
<script src="jquery.expandable.js"></script>

2. Create an input field on your web page.

<input id="search" type="text" placeholder="Type something here..."></input>

3. Call the plugin in the search input you just created and set the target view you want to expand to.

$("#search").expandable({
  width: 500,
});

4. Options and assumptions.

$("#search").expandable({

// width, extended to
width: 150,

// duration of the animation
duration: 300,

// function triggered when you press enter. 
// receive input's value as a parameter.
action: function(val){
  alert(val);
}

});

jQuery Plugin To Create Smooth Animated Text Fields, expandable-input Plugin/Github

See Demo And Download

Official Website(nnattawat): Click Here

This superior jQuery/javascript plugin is developed by nnattawat. For extra Advanced Usages, please go to the official website.