Edit in JSFiddle

var myString= "A word character is 0123456789, ABCDEFGHIGKLMNOPQRSTUVWXYZ, abcdefghijklmnopqrstuvwxyz, and _";

var myArray = myString.split(/\s/g);

console.log(myArray); 
/*logs

["A", "word", "character", "is", "0123456789,", "ABCDEFGHIGKLMNOPQRSTUVWXYZ,", "abcdefghijklmnopqrstuvwxyz,", "and", "_"]

*/