In this short blog post, we'll understand how we could find the number of arguments a JavaScript function accepts.
JavaScript's function object consists of a length property which could be used to get the number of arguments a JavaScript function accepts.
  1. function sum(arg1, arg2, arg3) {
  2. return arg1 + arg2 + arg3;
  3. }
  4. console.log(sum.length)
  5. // Output: 3
In the above code the console.log method will output 3 since the sum function accepts 3 arguments.