node.js - Can nodejs determine the client's browser type?

Question

How does nodejs determine the client's browser type? Think of Firefox or chrom

Answer 1

You can judge it in the request object. This is what the useragent header does

Answer 2

As mentioned above userAgent can judge
But, be careful! Useragent can be forged. Users like Chrome can change ua at will. You need to pay attention to this.