What are the common js regular expressions?

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Regular expressions are usually used for two tasks: 1. Verification, 2. Search / replace. When used for validation, you usually need to add ^ and $before and after to match the entire string to be verified; whether or not to add this qualification to search / replace depends on the requirements of the search, and it is also possible to add\ b before and after\ b instead of ^ and $. The common regular expressions listed in this table, except for a few, are not preceded by any restrictions. Please handle them yourself as needed.

1 user name regularization

/ / user name is regular, 4 to 16 digits (letters, numbers, underscores, minus signs) var uPattern = / ^ [a-zA-Z0-9 letters -] {4pm 16} $/; / output trueconsole.log (uPattern.test ("iFat3"))

2 password strength regularity

/ / password strength is regular, at least 6 characters, including at least 1 uppercase letter, 1 lowercase letter, 1 number, 1 special character var pPattern = / ^. * (? =. {6,}) (? =. *\ d) (? =. * [Amurz]) (? =. * [Amurz]) (?) (? =. * [! @ # $% ^ & *?]). / / output trueconsole.log ("=" + pPattern.test ("iFat3#"))

3 integer regularity

/ / positive integer regular var posPattern = / ^\ dhammer / negative integer regular var negPattern = / ^ -\ dhammer / integer regular var intPattern = / ^ -?\ dhammer / output trueconsole.log (posPattern.test ("42")); / / output trueconsole.log (negPattern.test ("- 42")); / / output trueconsole.log ("- 42"))

4 numeric regularity

It can be an integer or a floating point number.

/ / positive regular var posPattern = / ^\ d *\.?\ negative regular var negPattern = / ^ -\ d *\.??\ number regular var numPattern = / ^ -?\ d *\.?); console.log (negPattern.test ("- 42.2")); console.log (numPattern.test ("- 42.2"))

5 Email regular

/ / Email regular var ePattern = / ^ ([A-Za-z0-9 _\ -\.]) + @ ([A-Za-z0-9 _\ -\.]) +\. ([A-Za-z] {2jin4}) $/; / output trueconsole.log (ePattern.test (65974040@qq.com))

Or use

^\ w+ ([- +.]\ w+) * @\ w+ ([-.]\ w+) *.\ w+ ([-.]\ w+) * $

After testing, the matching degree is good.

6 regular mobile phone number

/ / Mobile phone number regular var mPattern = / ^ (13 [0-9]) | (14 [5 | 7]) | (15 ([0-3] | [5-9])) | (18 [0prime5-9]))\ d {8} $/; / output trueconsole.log (mPattern.test ("18600000000"))

7 ID card number regular

/ / ID card number (18 digits) regular var cP = / ^ [1-9]\ d {5} (18 | 19 | ([23]\ d))\ d {2} ((0 [1-9]) | (10 | 11 | 12)) (([0-2] [1-9]) | 10 | 20 | 30 | 31)\ d {3} [0-9Xx] $/; / output trueconsole.log (cP.test ("11010519880605371X"))

8 URL regular

/ / ID card number (18 digits) regular var cP = / ^ [1-9]\ d {5} (18 | 19 | ([23]\ d))\ d {2} ((0 [1-9]) | (10 | 11 | 12)) (([0-2] [1-9]) | 10 | 20 | 30 | 31)\ d {3} [0-9Xx] $/; / output trueconsole.log (cP.test ("11010519880605371X"))

9 IPv4 address regular

/ / ipv4 address regular var ipP = / ^ (?: 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]?) $/; / output trueconsole.log (ipP.test ("115.28.47.26"))

10 hexadecimal color regularity

/ / RGB Hex color regular var cPattern = / ^ #? ([a-fA-F0-9] {6} | [a-fA-F0-9] {3}) $/; / output trueconsole.log (cPattern.test ("# b8b8b8"))

11 date regular

/ / regular date, simple judgment, var dP1 = / ^\ d {4} (\ -)\ d {1Magne2}\ 1\ d {1Magne2} $/; / output trueconsole.log (dP1.test ("2017-05-11")); / / output trueconsole.log (dP1.test ("2017-15-11")) / / date regularity Complexity decision var dP2 = / ^ (: (! 0000) [0-9] {4}-(: 0 [1-9] | 1 [0-2])-(: 0 [1-9] | 1 [0-9] | 2 [0-8]) | (?: 0 [13-9] | 1 [0-2])-(?: 29 | 30) | (?: 0 [13578] | 1 [02])-31) | (?: [0-9] {2}) ?: 0 [48] | [2468] [048] | [13579] [26]) | (?: 0 [48] | [2468] [048] | [13579] [26]) 00)-02-29) $/ / / output trueconsole.log (dP2.test ("2017-02-11")); / / output falseconsole.log (dP2.test ("2017-15-11")); / / output falseconsole.log (dP2.test ("2017-02-29"))

12 QQ number regular

/ / QQ sign regular, 5 to 11 digits var qqPattern = / ^ [1-9] [0-9] {4pm 10} $/; / output trueconsole.log (qqPattern.test ("65974040"))

13 Wechat regular number

/ / WeChat account regular, 6 to 20 digits, starting with a letter, letter, number, minus sign, underscore var wxPattern = / ^ [a-zA-Z] ([- _ a-zA-Z0-9] {5pm 19}) + $/; / output trueconsole.log (wxPattern.test ("RuilongMao"))

14 the license plate number is regular

/ license plate number regular var cPattern = / ^ [Beijing, Tianjin, Shanghai, Chongqing, Hebei, Henan, Yunnan, Hunan, Anhui, Shandong, new Jiangsu, Zhejiang, Jiangxi, Hubei, Guangxi, Ganjin, Shan, Ji, Fujian, Gui, Guangdong, Qinghai, Tibet, Sichuan and Ningqiong] {1} [A-Z0-9] {4} [A-Z0-9 hang academic police Hong Kong and Macao] {1} $/; / output trueconsole.log ("Beijing K39006")

15 contains Chinese rules

/ / contains Chinese regular var cnPattern = / [\ u4E00 -\ u9FA5] /; / / outputs trueconsole.log (cnPattern.test ("42 degrees"). This is all the content of the article "what are the common js regular expressions?" Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!