var str = "kiwi";
var res1 = str.localeCompare("banana"); // 1
var res2 = str.localeCompare("kiwi"); // 0
var res3 = str.localeCompare("orange"); // -1
// 출력
document.write(res1 + "<br>");
document.write(res2 + "<br>");
document.write(res3 + "<br>");