<pre><code>function detectType(data) {
  // your code here
  if(typeof data!=='object') return typeof data;
  if(data===null) return 'null';
  return data.constructor.name.toLowerCase();
  
}
</code></pre>

a simple solution used by google team

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…