The String object has one static method, String.fromCharCode(), which is used to create a string representation from a sequence of Unicode characters. Here we build a simple string using the ASCII codes
String.fromCodePoint(70, 108, 97, 118, 105, 111) //'Flavio'
You can also use octal or hexadecimal numbers:
String.fromCodePoint(0x46, 0154, parseInt(141, 8), 118, 105, 111) //'Flavio'
All the other methods described here are instance methods: methods that are run on a string type.
A string offers a few unique methods you can use:
charAt(i)charCodeAt(i)codePointAt(i)concat(str)endsWith(str)includes(str)indexOf(str)lastIndexOf(str)localeCompare()match(regex)normalize()padEnd()padStart()repeat()replace(str1, str2)search(str)slice(begin, end)split(separator)startsWith(str)substring()toLocaleLowerCase()toLocaleUpperCase()toLowerCase()toString()toUpperCase()trim()trimEnd()trimStart()valueOf()