Skip to content
master
Switch branches/tags
Code

Latest commit

 

Git stats

Files

Permalink
Failed to load latest commit information.
Type
Name
Latest commit message
Commit time
src
 
 
 
 
 
 

Deprecation notice

This library is no longer maintained, you may want to take a look at this solution instead: https://github.com/component/textarea-caret-position

JavaScript cursor position in a textarea or input

What

To obtain the text cursor position in a <textarea> or an <input> text field. Cursor position is provided either in characters, or in pixels relative to top-left corner of the text area.

Why

The library can be used for positioning of a completion popup window in a <textarea> or <input> text field right near the caret. Given that long text is wrapped in <textarea>s, the task is not very trivial.

Alternative solution

There is another, more recent library which uses the same principle and may have less (or different) bugs: https://github.com/component/textarea-caret-position

How

The library tries to model text wrapping in the textarea and to find out relative cursor position. The results are not 100% accurate, but really close to it. Tested against IE8+, Chrome, Opera, Firefox as of 2012.

Usage

var padding = 3;
var positioner = new maxkir.CursorPosition(textarea_element, padding);
alert(positioner.getCursorCoordinates());  // [x, y] position of cursor in textarea in characters
alert(positioner.getPixelCoordinates());   // [x, y] position of cursor in textarea in pixels

See also the functional test under [test/cursor_position_test.html]<test/cursor_position_test.html>

Dependencies

None, plain JavaScript code.

-- Copyright (c) 2010-2012 Kirill Maximov, released under the MIT license

About

A small library which allows to detect cursor position in Javascript textarea

Resources

License

Releases

No releases published

Packages

No packages published