JS Regular expression

First: Number type

1 Number: ^[0-9]*$

2 N-bit number: ^\d{n}$

3 Number of at least n digits: ^\d{n,}$

4 m-n digits: ^\d{m,n}$

Numbers starting with 50 and non 0: ^ (0|[ 1-9][0-9]*) $

6 numbers with a maximum of two decimal places starting with non 0: ^ ([1-9][0-9]*) + (. [ 0-9]{1,2})? $

7 positive or negative numbers with 1-2 decimal places: ^ (\-)? \d+ (\.\d{1,2})? $

8 positive, negative, and fractional: ^ (\-|\+)? \d+ (\.\d+)? $

9 positive real numbers with two decimal places: ^[0-9]+ (. [ 0-9]{2})? $

10 positive real numbers with a decimal position: ^[0-9]+ (. [ 0-9]{1,3})? $

11 non-zero positive integers: ^[1-9]\d*$ or ^ ([1-9][0-9]*) {1,3}$ or ^\+? [1-9] [0-9]*$

12 non-zero negative integer: ^\-[1-9][]0-9 "*$ or ^-[1-9]\d*$

13 non-negative integers: ^\d+$ or ^[1-9]\d*|0$

14 Non-positive integers: ^-[1-9]\d*|0$ or ^ ((-\d+) | ( 0+)) $

15 non-negative floating point number: ^\d+ (\.\d+)? $ or ^[1-9]\d*\.\d*|0\.\d*[1-9]\d*|0?\.0+|0$

16 Non-positive floating-point number: ^ ((-\d+ (\.\d+)?) | (0+ (\.0+)?)) $ or ^ (-([1-9]\d*\.\d*|0\.\d*[1-9]\d*)) |0?\.0+|0$

17 Positive floating point number: ^[1-9]\d*\.\d*|0\.\d*[1-9]\d*$ or ^ ([0-9]+\.[ 0-9]*[1-9][0-9]*) | ([0-9]*[1-9][0-9]*\. [0-9]+) | ([0-9]*[1-9][0-9]*)) $

18 Negative floating point number: ^-([1-9]\d*\.\d*|0\.\d*[1-9]\d*) $ or ^ (-([0-9]+\.[ 0-9]*[1-9][0-9]*) | ([0-9]*[1-9][0-9]*\. [0-9]+) | ([0-9]*[1-9][0-9]*))) $

19 floating-point number: ^ (-?\d+) (\.\d+)? $ or ^-? ([1-9]\d*\.\d*|0\.\d*[1-9]\d*|0?\.0+|0) $

Second: Common regular expressions

User name	/^[a-z0-9_-]{3,16}$/
Password	/^[a-z0-9_-]{6,18}$/
Hexadecimal value	/^#? ([a-f0-9]{6}| [A-f0-9] {3}) $/
E-Mail	/^ ([a-z0-9_\.-]+) @ ([\da-z\.-]+) \. ([A-z\.] {2,6}) $/ /^[a-z\d]+ (\.[ a-z\d]+) *@ ([\da-z] (-[\da-z])?) +(\. {A} [a-z]+] +$/
Url	/^ (https?:\ /\/)? ([\da-z\.-]+) \. ([A-z\.] {2,6}) ([\/\w \.-]*) *\/?$/
IP Address	/((2[0-4]\d|25[0-5]| [01]?\d\d?] \.) {3} (2[0-4]\d|25[0-5]| [01]?\d\d?] / /^(?:(? : 25[0-5]|2[0-4][0-9]| [01]? [0-9] [0-9]?) \.) {3} (?: 25[0-5]|2[0-4][0-9]| [01]? [0-9] [0-9]?) $/
HTML tags	/^< ([a-z]+) ([^<]+) * (?:> (. *) <\/\1>|\s+\/>) $/
Delete code \ \ Comment	(? <!http:|\s)//.*$
The range of Chinese characters in Unicode encoding	/^[\u2e80-\u9fff]+$/

JS Regular expression