JavaScript String API Simple description

1, can return the character of the specified position

Stringobject.charat (index);

2, returns the encoding of the character at the specified position

Stringobject.charcodeat (index);

3, used to concatenate two or more strings, return new string does not modify the original string

Stringobject.concat (Stringx,stringx,..., stringx);

4. Returns the position of the first occurrence of a specified string value in the string, fromindex means starting from the subscript

Stringobject.indexof (Searchvalue,fromindex);

5. Returns the position of the last occurrence of a specified string value, Fromindex, starting with the subscript (but note that the number is reversed)

Stringobject.lastindexof (Searchvalue,fromindex);

6, you can retrieve the specified value within a string, or find the match of one or more regular expressions

Stringobject.match (Searchvalue); Stringobject.match (regexp);

7, the string replaces some characters with some other characters, or replaces a substring that matches a regular expression, returns a new string without modifying the original string

Stringobject.replace (regexp/substr,replacement);

8, used to retrieve a substring specified in a string, or to retrieve a substring that matches a regular expression

Stringobject.search (RegExp);

9. Can extract a part of a string and return the extracted part with a new string

Stringobject.slice (Start,end);

10, divides a string into the string array, separator expresses to divide the cutting point, howmany represents the maximum length

Stringobject.split (Separator,howmany);

11. You can extract a specified number of characters from the start subscript in a string, start can be negative, 1 means the last-2 countdown to the first and so on, length

Stringobject.substr (start,length);

12. A character used to extract a string between two specified subscripts

Stringobject.substring (Start,stop);

JavaScript String API Simple description