string comparison in javascript

1
2var str1 = "ab";
3var str2 = "ab";
4var n = str1.localeCompare(str2);
5 

1let string = "1";
2let number = 1;
3if (parseInt(string) === number){
4  	// STRING AND NUMBER MATCHES
5}
6if (string == number){
7  // STRING AND NUMBER MATCHES ALSO BECAUSE == instead of ===, means it won't compare datasets, only the content
8}

1console.log(NaN===NaN);//false

1console.log("10" == "10"); //True
2console.log(parseInt(10) == 10); // True Best practice