algorithm - Text difference patch -

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Trying to write a piece of code that will allow the user to type in the text box which is then saved on the server goes . When the user writes some more text in the text box, then I should only want the difference to be sent to the server

Is there any difference algorithm for JS that I can use to only send information about the difference I am So it should basically be able to tell the difference between the two text boxes.

This language can also be agnostic and I can turn it off.

Thank you for your time.

>

UPDATE

In simple words, I have a text area that saves text in every x second in the box. To save bandwidth now, I only want to send the difference with the last saved revisions (which I can put in a variable. Initially it will be empty). Now JS will see the difference between the last revision and the current state of the text box and a change list will be prepared to send to the server.

Update 2

Something like www.etherpad.com

Google DiffMatchPatch has a JavaScript implementation, I've used it very successfully.


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