<pre class="shiki github-dark shaku"><code>/** * @param {any} data * @return {string} */function detectType(data) { if (data === undefined) return 'undefined' if (data===null) return 'null' return data.constructor.name.toLowerCase() }</code></pre>

Simple 3 lines solution

This is an easy problem. For all the basic data types in JavaScript, how could you write a function to detect the type of arbitrary data? Besides basi…