Playing with the HTML5 File API: translating a Fasta file.

In the current post, I'm using the new HTML5 File Api. This new API can read the content of a file on the client side without needing a remote server. Let me repeat this:

YOU DO NOT NEED A SERVER
YOU DO NOT NEED TO COPY AND PASTE THE CONTENT OF THE FILE IN A TEXTAREA

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As an example, the following code reads a whole DNA fasta file stored on your computer and translate each DNA sequence to a protein. When the user selects a new file, a FileReader object is created and a callback function translating the DNA is invoked when the fasta file has been loaded.

Test (your browser must support HTML5)

Select a DNA FASTA file:

Source code

That's it,

Pierre