Edit fiddle - JSFiddle - React, Tailwind, and code Playground

JSFiddle - React, Tailwind, and code Playground

by Khalil Zhang August 25, 2012

JavaScript

document.write('!! undefined: ' + !! undefined + '<br/>');
document.write('!! null: ' + !! null + '<br/>');
document.write('!! true: ' + !! true + '<br/>');
document.write('!! false: ' + !! false + '<br/>');
document.write('!! NaN: ' + !! NaN + '<br/>');
document.write('!! '': ' + !! '' + '<br/>');
document.write('!! '   ': ' + !! '   ' + '<br/>');
document.write('!! {}: ' + !! {} + '<br/>');
document.write(' !! []: ' + !! [] + '<br/>');
document.write(' !! function(){}: ' + !!
function() {} + '<br/>');

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JSFiddle - React, Tailwind, and code Playground

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Join the 4+ million users, and keep the JSFiddle dream alive.

Ad-free

Use pre-released features

Fiddle collections

Private collections and fiddles

Console