var csv = require("react-fast-csv");

var CSV_STRING = 'a,b\n' +
                 'a1,b1\n' +
                 'a2,b2\n';

csv
 .fromString(CSV_STRING, {headers: true})
 .on("data", function(data){
     console.log(data);
 })
 .on("end", function(){
     console.log("done");
 });