Javascript string extension library code_javascript skills

Javascript's native String processing functions are not rich enough.
Native string function: http://www.jb51.net/w3school/js/jsref_obj_string.htm

Question 1: Is there an extension library just for String type?
Yes, not many, not comprehensive.

View 2: The power of JQuery lies in DOM operations, so we don’t want the js string extension library to be developed based on jquery. Do you agree?

Question 3: What kind of string extension function do we need?
For this question, you can refer to other js libraries and string operation functions in other languages ​​

Prototype.js extension to the String type:
http://api.prototypejs. org/language/string/

String type function reference in other languages
C#:http://msdn.microsoft.com /zh-cn/library/system.string_members(v=VS.80).aspx
Java:http://java.sun. com/j2se/1.4.2/docs/api/java/lang/String.html
Python:http://docs.python. org/library/stdtypes.html#string-methods
Perl:, perl is a process-oriented programming language, there is no concept of string objects, all string-related operations Functions are all scattered, haha.

Question 4: What is the best programming style for String function extension?
String.prototype.trim = function()
{
// Use regular expressions to replace leading and trailing spaces with empty strings.
return this.replace(/(^s*)|(s*$)/g, "");
}

Question 5: More abstractly, can all operating functions be considered Are they all for adding, deleting, modifying, checking, and type conversion of strings?