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January 18, 2022 23:39
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Cursed JavaScript for School
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Cursed JavaScript</title> | |
| </head> | |
| <body> | |
| <div id="app"> | |
| <h1>JavaScript: Everything is an Object</h1> | |
| <p>In JavaScript, everything is an object. This means you can do some very weird things.</p> | |
| <div id="content"> | |
| </div> | |
| <h2>RNG</h2> | |
| <p id="rng"></p> | |
| <button id="rng-btn">Generate</button> | |
| </div> | |
| <style> | |
| code { | |
| display: block; | |
| padding-left: 25px; | |
| padding-right: 25px; | |
| padding-top: 2px; | |
| padding-bottom: 2px; | |
| background-color: #a9a9a9; | |
| color: #000; | |
| } | |
| </style> | |
| <script> | |
| (function() { | |
| const rng = document.getElementById('rng'); | |
| const rng_btn = document.getElementById('rng-btn'); | |
| rng_btn.onclick = function() { | |
| rng.innerText = "Random Number: " + Math.random(); | |
| }; | |
| rng_btn.onclick(); | |
| const content_el = document.getElementById('content'); | |
| const contents = [ | |
| { input: '2 + true', out_type: 'number' }, | |
| { input: '2 - false', out_type: 'number' }, | |
| { input: 'typeof (NaN)', out_type: 'string' }, | |
| { input: 'typeof (Infinity)', out_type: 'string' }, | |
| { input: 'NaN + Infinity', out_type: 'number' }, | |
| { input: '"2" + "5"', out_type: 'string' }, | |
| { input: '2 + "5"', out_type: 'string' }, | |
| { input: '10 + 5 % 2', out_type: 'string' }, | |
| { input: '(10 + 5) % 2', out_type: 'string' }, | |
| { input: '"dog" || "cat" || "cow"', out_type: 'string' }, | |
| { input: '"dog" && "cat" && "cow"', out_type: 'string' } | |
| ]; | |
| const default_fmt = (input) => input.toString(); | |
| const type_fmt = { | |
| 'string': (input) => `"${input}"`, | |
| 'number': default_fmt | |
| }; | |
| for (const content of contents) { | |
| const output_pre_fmt = eval(content.input); | |
| const output_fmt_fn = type_fmt[content.out_type] || default_format; | |
| const output = output_fmt_fn(output_pre_fmt); | |
| const el = document.createElement('code'); | |
| el.innerHTML = content.input + " = " + output; | |
| content_el.appendChild(el); | |
| } | |
| })(); | |
| </script> | |
| </body> | |
| </html> |
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