Can I use forEach on objects in JavaScript?

Can I use forEach on objects in JavaScript?

No, forEach is a method for arrays. You can use it on array-like objects, but not directly on plain objects.

What should I use instead for objects?

You can use a for...in loop or Object.keys() with forEach to iterate over the properties of an object.

Can you show me an example of using Object.keys()?

Sure! Here's an example:

const obj = { a: 1, b: 2, c: 3 }; 
Object.keys(obj).forEach(key => { 
  console.log(key, obj[key]); 
});

What about using Object.entries()?

Object.entries() is great! It returns an array of key-value pairs, and you can use forEach like this:

Object.entries(obj).forEach(([key, value]) => {
  console.log(key, value);
});