[Javascript] String cheatsheet

var abc = “abcdefghijklmnopqrstuvwxyz”;
var esc = ‘I don\’t \n know’;            // \n new line
var len = abc.length; 
abc.indexOf(“lmno”);      // find substring, -1 if doesn’t contain 
abc.lastIndexOf(“lmno”);  // last occurrence
abc.slice(3, 6);          // cuts out “def”, negative values count from behind
abc.replace(“abc”,”123"); // find and replace, takes regular expressions
abc.toUpperCase();        // convert to upper case
abc.toLowerCase();        // convert to lower case
abc.concat(“ “, str2);    // abc + “ “ + str2
abc.charAt(2);            // character at index: “c”
abc[2];  
abc.charCodeAt(2);        // character code at index: “c” -> 99
abc.split(“,”);           // splitting a string on commas 
abc.split(“”);            // splitting on characters

Advance

'0123456789'.slice(-1)       //"9"
'0123456789'.slice(5, -1)       //"5678"

Reference

— https://htmlcheatsheet.com/js/