Daniel Temkin, 2017

on GitHub

One of Forty-Four Esolangs (2025, MIT Press)

FatFinger is a JavaScript library expanding JS to allow typos and misspellings as valid code. Why bother with clean, well-formatted JS when you can write this and FatFinger will guess at your intentions?

        <script type="text/javascript" src="fatfinger.js"></script>
        <script type="text/javoscript">
            // any misspelling of javascript works in the type attribute above
            vart x = "herrrllo werld"
            dokkkkumint.rit3(xx)
        </script>
    

Don't bother with semi-colons. Open brackets and never close them. Misspell keywords, variables, and functions.

Why?

• Neutralize the autocorrect mentality
• Question forty-five years of advice against expressiveness in the text of code
• Play against the compulsiveness of programming
• Embrace the chaos of JavaScript

Test out your code:

How To Use

Include fatfinger.js in your project, add a script tag with any misspelling of JavaScript containing your FatFingered code. You'll need to declare all your vars as if option explicit; FatFinger assumes implicit declarations are actually misspelled statements. FatFinger has a poor concept of scope, so if you're doing fancy OO stuff, ask yourself: is there a good reason I haven't made everything global??? If not, this might not be the right library / coding style for you.

See Also

• Entropy (almost an inverse of FatFinger)
• FuckIt.JS
• Mimic
• JSFuck

Other Languages

• Folders (2015)
• Valence (2025)
• Light Pattern (2012)
• and more...

FatFinger is one of Forty-Four Esolangs discussed in my artist's monograph by MIT Press