JavaScript Regular Expression-character

JavaScript regular expression characters include two categories:

1, ordinary characters .

2, escape character .

Normal characters

Uppercase and lowercase letters, numbers, and any other symbols.

Escape character

Escape character	Meaning
\f	Page break
\ n	Line break
\ r	Carriage return character
\ t	Tabs
\b	Backspace
\o	Null character
\xnn	nn ascii
\uxxx	xxxx unicode character
\\	Reverse Slash
^	To match the "^" character itself requires the use of "\^"
$	to match " $ "" \$ "
()	to match the parentheses you need to use "\ (" and " \) "
[]	to match brackets you need to use "\[" and " \] "
{}	to match curly braces you need to use "\{" and " \} "
.	to match the decimal point itself needs to use " \."
?	"?" "\?"
+	to match " + "" \+ "
*	to match " * "" \* "
|	To match the ' | ' the characters themselves need to use "\|"

JavaScript Regular Expression-character