How to read and write into file using JavaScript?

Question

Can anybody give some sample code to read and write a file using JavaScript?

Answer 1

The future is here! The proposals are closer to completion, no more ActiveX or flash or java. Now we can use:

• File System APIs

• Native Drag&Drop File Access

You could use the Drag/Drop to get the file into the browser, or a simple upload control. Once the user has selected a file, you can read it w/ Javascript: http://www.html5rocks.com/en/tutorials/file/dndfiles/