JSFiddle - React, Tailwind, and code Playground

by Keith Elias

JavaScript

function assert(condition,okMessage,failMessage){
    if(condition) document.writeln(okMessage);
    else document.writeln(failMessage);
}

function useless(callback) { return callback(); }

var text = 'Domo arigato!';
assert(useless(function(){ return text; }) === text,
"The uselessfunction works! " + text);