How to covert String into array in React Native

How to convert String into the array in React Native. for example:-

var myString = 'this, is my, string';

separate string with "," and output must be

  myArray = [this, is my, string];  on myArray[0] value is "this",  on myArray[1] value is " is my",  on myArray[2] value is " string"