diff --git a/CHANGELOG.md b/CHANGELOG.md
index a8fc8d5f6..730434fd2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@
- mkdocs: clojure-idiom admonition style
- dev: gitleaks rules configuration for checking secrets in megalinter workflow
- clojure-cli: update donut system and system-repl examples
+- reference: code block and admonition for common regular expression examples
# 2024-03-03
diff --git a/docs/reference/standard-library/regular-expressions/common-regex-patterns.md b/docs/reference/standard-library/regular-expressions/common-regex-patterns.md
index 8b0d55980..8ddffeaa7 100644
--- a/docs/reference/standard-library/regular-expressions/common-regex-patterns.md
+++ b/docs/reference/standard-library/regular-expressions/common-regex-patterns.md
@@ -12,7 +12,7 @@ A 8 to 24 character passwords that can include any lower case character or digit
Breakdown the regex pattern:
-```
+```regex
^[a-z0-9_-]{8,24}$
^ # Start of the line
@@ -33,7 +33,7 @@ The order of the grouping formulas does not matter
Breakdown the regex pattern:
-```
+```regex
((?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%]).{8,24})
( # Start of group
@@ -58,7 +58,7 @@ The string must start with a `#`symbol , follow by a letter from `a` to `f`, `A`
Breakdown the regex pattern:
-```
+```regex
^#([A-Fa-f0-9]{3}|[A-Fa-f0-9]{6})$
^ #start of the line
@@ -83,12 +83,12 @@ The domain starts with `A-Za-z0-9-`, follow by first level domain, e.g `.org`,
"jenny.jenn@jetpack.com.au")
```
-> ####Hint::Double escaping special characters
-> Double escaping of special characters is not required in the Clojure syntax.
+!!! HINT "Double escaping special characters"
+ Double escaping of special characters is not required in the Clojure syntax.
Breakdown the regex pattern:
-```
+```regex
^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$
^ #start of the line
@@ -117,13 +117,14 @@ Change the combination `(jpg|png|gif|bmp)` for other file extension.
(re-matches #"(?i)([^\s]+(\.(jpg|png|gif|bmp))$)" "clojure-logo.png")
```
-> #### Hint::in-line modifiers not supported in JavaScript
->
-> The REPL above uses ClojureScript, hosted on JavaScript. JavaScript does not support in-line modifier flags such as `(?i)` for a case insensitive pattern. In-line flags will be [converted by the ClojureScript reader if they are the first element in the literal regular expression pattern](https://stackoverflow.com/a/23187290/1762872), or if the `js/RegExp` function is used to create the regular expression.
+??? HINT "In-line modifiers indirectly supported in ClojureScript"
+ ClojureScript is hosted on JavaScript which does not support in-line modifier flags such as `(?i)` for a case insensitive pattern.
+
+ In-line flags will be [converted by the ClojureScript reader if they are the first element in the literal regular expression pattern](https://stackoverflow.com/a/23187290/1762872), or if the `js/RegExp` function is used to create the regular expression.
Breakdown the regex pattern:
-```
+```regex
([^\s]+(\.(?i)(jpg|png|gif|bmp))$)
( #Start of the group #1
@@ -159,7 +160,7 @@ Example IP address are: `192.168.0.1`, `127.0.0.1`, `192.120.240.100`
Breakdown the regex pattern:
-```
+```regex
^([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\.([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\.
([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\.([01]?\\d\\d?|2[0-4]\\d|25[0-5])$
@@ -187,7 +188,7 @@ Time in 12-Hour Format Regular Expression Pattern. The 12-hour clock format sta
Breakdown the regex pattern:
-```
+```regex
(1[012]|[1-9]):[0-5][0-9](\\s)?(?i)(am|pm)
( #start of group #1
@@ -212,7 +213,7 @@ The 24-hour clock format start between 0-23 or 00-23, then a semi colon `:` and
Breakdown the regex pattern:
-```
+```regex
([01]?[0-9]|2[0-3]):[0-5][0-9]
( #start of group #1
@@ -224,7 +225,7 @@ Breakdown the regex pattern:
[0-5][0-9] # follow by 0..5 and 0..9, which means 00 to 59
```
-## Date Format (dd/mm/yyyy) Regular Expression Pattern
+## Date Format Pattern
Date format in the form `dd/mm/yyyy`. Validating a leap year and if there is 30 or 31 days in a month is not simple though.
@@ -234,7 +235,7 @@ Date format in the form `dd/mm/yyyy`. Validating a leap year and if there is 30
Breakdown the regex pattern:
-```
+```regex
(0?[1-9]|[12][0-9]|3[01])/(0?[1-9]|1[012])/((19|20)\\d\\d)
( #start of group #1
@@ -256,63 +257,71 @@ Breakdown the regex pattern:
) # end of group #3
```
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+## HTML tag Pattern
+
+HTML code uses tags to define structure of content. HTML tag, start with an opening tag “<" , follow by double quotes "string", or single quotes 'string' but does not allow one double quotes (") "string, one single quote (') 'string or a closing tag > without single or double quotes enclosed. At last , end with a closing tag “>”
+
+```clojure
+(re-matches
+ #"<("[^"]*"|'[^']*'|[^'">])*>"
+ "Title
Loreum ipsum
")
+```
+
+Breakdown the regex pattern:
+
+```regex
+<("[^"]*"|'[^']*'|[^'">])*>
+
+< #start with opening tag "<"
+ ( # start of group #1
+ "[^"]*" # only two double quotes are allow - "string"
+ | # ..or
+ '[^']*' # only two single quotes are allow - 'string'
+ | # ..or
+ [^'">] # cant contains one single quotes, double quotes and ">"
+ ) # end of group #1
+ * # 0 or more
+> #end with closing tag ">"
+```
+
+## HTML links Regular Expression Pattern
+
+HTML A tag Regular Expression Pattern
+
+```regex
+(?i)]+)>(.+?)
+
+( #start of group #1
+ ?i # all checking are case insensitive
+) #end of group #1
+]+ # anything except (">"), at least one character
+ ) # end of group #2
+ > # follow by ">"
+ (.+?) # match anything
+ # end with "
+```
+
+## Extract HTML link Regular Expression Pattern
+
+```regex
+\s*(?i)href\s*=\s*(\"([^"]*\")|'[^']*'|([^'">\s]+));
+
+\s* #can start with whitespace
+ (?i) # all checking are case insensive
+ href # follow by "href" word
+ \s*=\s* # allows spaces on either side of the equal sign,
+ ( # start of group #1
+ "([^"]*") # only two double quotes are allow - "string"
+ | # ..or
+ '[^']*' # only two single quotes are allow - 'string'
+ | # ..or
+ ([^'">]+) # cant contains one single / double quotes and ">"
+ ) # end of group #1
+```
+-->
## Reference
-*
+* [10 Java regular expression examples](https://mkyong.com/regular-expressions/10-java-regular-expression-examples-you-should-know)