How to Use typeof With Functions

typeof is a useful operator that returns the primitive type of the given variable. typeof can be used with function-like syntax, however, it is not a function. Be careful, you will get a syntax error if you try to use typeof as a variable!

typeof(42); // `number`
typeof(typeof); // syntax error

You can use typeof on functions, and it will return as function.

function test() {
  console.log('hello world');
}
typeof test; // 'function'

---

More Fundamentals Tutorials

• Rename Variables When Using Object Destructuring in JavaScript
• Split on Multiple Characters in JavaScript
• Empty Objects are Truthy in JavaScript?
• How to Merge Two Objects in JavaScript
• The firstChild Property in JavaScript
• The document.createElement Function in JavaScript
• String replaceAll() in JavaScript