how to s get length of array in javascript code example

Example 1: javascript size array

let array = [1, 2, 3];
console.log(array.length);

Example 2: array length in js'

var x = [];
  console.log(x.size());
  console.log(x.length);
  console.log(x.size()==x.length);
  x =[1,2,3];
  console.log(x.size());
  console.log(x.length);
  console.log(x.size()==x.length);
//arjun