String operation method (everyone has what do not understand can come to me ah, but this article is a bit not so tall still, everyone do not mind OH)

String. CharAt (Index): Returns the character at the specified position in the preceding string

String. charCodeAt (Index): the encoding (Unicode) of the character that returns the position specified in the preceding string

String.fromCharCode (encoded value): Convert the encoded value to the corresponding character

String. substring (start, end): Returns the string from the start position to the end position in the preceding original string, without the character of the end position

String. Slice (start, end): Returns the string from the start position to the end position in the preceding original string, without the character of the end position

String. indexOf (char, start): Returns the position of the first occurrence of the specified character in the preceding string
Char: the character to find
Start: The starting position of the lookup

String. LastIndex (char, start): Returns the position of the first occurrence of the specified character in the trailing string

String. Search (): Finds and returns the location where the string appears, not found-1

String. Trim (): Remove string trailing spaces

String. toUpperCase (): Turn uppercase
String. toLowerCase (): Turn lowercase

The string. Split (): Splits the string into multiple characters by the specified delimiter and saves them in the array.
return value: Array

String operation method (everyone has what do not understand can come to me ah, but this article is a bit not so tall still, everyone do not mind OH)