This document describes various string methods in JavaScript including charAt(), charCodeAt(), concat(), fromCharCode(), indexOf(), lastIndexOf(), match(), replace(), search(), slice(), split(), substr(), substring(), toLowerCase(), toUpperCase(), trim(), valueOf(), anchor(), big(), and more formatting methods. It provides examples of each method, demonstrating how to call the method and what it returns.

1. String

2. charAt()
var str = "HELLO WORLD";
var res = str.charAt(0);
// H

3. charCodeAt()
var str = "HELLO WORLD";
var n = str.charCodeAt(0);
/72

4. concat()
var str1 = "Hello ";
var str2 = "world!";
var res = str1.concat(str2);
// Hello world

5. fromCharCode()
var res = String.fromCharCode(65);
// A

6. indexOf()
var str = "Hello world, welcome to the
universe.";
var n = str.indexOf("welcome");
// 13

7. lastIndexOf()
var str = "Hello planet earth, you are a
great planet.";
var n = str.lastIndexOf("planet");
// 36

8. match()
var str = "The rain in SPAIN stays mainly
in the plain";
var res0 = str.match(/ain/g); //global
var res1 = str.match(/ain/gi); //global
ignore case
// ain,ain,ain
// ain,AIN,ain,ain

9. replace
var str = "Visit Microsoft!";
var res = str.replace("Microsoft", “Apple");
// Visit Apple

10. Search()
var str = "Visit Apple!";
var n = str.search(“Apple");
// 6

11. slice()
var str = "Hello world!";
var res = str.slice(1,5);
// ello

12. split()
var str = "How are you doing today?";
var res = str.split(" ");
// How,are,you,doing,today? (array)

13. substr()
var str = "Hello world!";
var res = str.substr(1, 4)
//ello
// desde el 1º 4 caracteres

14. substring()
var str = "Hello world!";
var res = str.substring(1, 4);
// ell
// desde el 1º al 4º caracter sin incluirlo.

15. toLowerCase()
var str = "Hello World!";
var res = str.toLowerCase();
// hello world

16. toUpperCase()
var str = "Hello World!";
var res = str.toUpperCase();
// HELLO WORLD

17. trim()
var str = " Hello World! ";
alert(str.trim());
//Hello World

18. valueOf
var str = “1234";
var res = str.valueOf();
// 1234

19. anchor()
var txt = "Chapter 10";
txt.anchor("chap10");
// <a name="chap10">Chapter 10</a>

20. big()
var str = "Hello World!";
var result = str.big();
// Hello World!

21. Y más…
var txt = "Hello World!";
document.write("The original string: " + txt);
document.write("<p>Big: " + txt.big() + "</p>");
document.write("<p>Small: " + txt.small() + "</p>");
document.write("<p>Bold: " + txt.bold() + "</p>");
document.write("<p>Italic: " + txt.italics() + "</p>");
document.write("<p>Fixed: " + txt.fixed() + "</p>");
document.write("<p>Strike: " + txt.strike() + "</p>");
document.write("<p>Fontcolor: " + txt.fontcolor("green") + "</p>");
document.write("<p>Fontsize: " + txt.fontsize(6) + "</p>");
document.write("<p>Subscript: " + txt.sub() + "</p>");
document.write("<p>Superscript: " + txt.sup() + "</p>");
document.write("<p>Link: " + txt.link("http://www.itmaster.com.ar") +
"</p>");