how to get paramater type javascript code example

Example 1: javascript function variable arguments

function foo() {
  for (var i = 0; i < arguments.length; i++) {
    console.log(arguments[i]);
  }
}

foo(1,2,3);
//1
//2
//3

Example 2: check data type in js

typeof("iAmAString");//This should return 'string'
//NO camelCase, as it is a JS Keyword