regex101: JavaScript Match Workspace

^start of line

Group modifier(?<modifier>(ctrl|alt|shift)(?:\+(ctrl|alt|shift)(?<!\2))?(?:\+(ctrl|alt|shift)(?<!\2|\3))?\+)?

?repeats the group contents below at most once:

Group 2(ctrl|alt|shift)

1st Alternativectrl

ctrlthe literal text ctrl (case sensitive)

2nd Alternativealt

altthe literal text alt (case sensitive)

3rd Alternativeshift

shiftthe literal text shift (case sensitive)

Non-Capturing Group(?:\+(ctrl|alt|shift)(?<!\2))?

?repeats the group contents below at most once:

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

Group 3(ctrl|alt|shift)

1st Alternativectrl

ctrlthe literal text ctrl (case sensitive)

2nd Alternativealt

altthe literal text alt (case sensitive)

3rd Alternativeshift

shiftthe literal text shift (case sensitive)

Negative Lookbehind(?<!\2)

\2the text saved by group 2

Non-Capturing Group(?:\+(ctrl|alt|shift)(?<!\2|\3))?

?repeats the group contents below at most once:

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

Group 4(ctrl|alt|shift)

1st Alternativectrl

ctrlthe literal text ctrl (case sensitive)

2nd Alternativealt

altthe literal text alt (case sensitive)

3rd Alternativeshift

shiftthe literal text shift (case sensitive)

Negative Lookbehind(?<!\2|\3)

1st Alternative\2

\2the text saved by group 2

2nd Alternative\3

\3the text saved by group 3

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

1st Alternative[^\s+]

Negated Character Class[^\s+]

\sany whitespace character

+the literal + (43₁₀ / 53₈ / 2B₁₆)

2nd Alternativebackspace

backspacethe literal text backspace (case sensitive)

3rd Alternativetab

tabthe literal text tab (case sensitive)

4th Alternativeenter

enterthe literal text enter (case sensitive)

5th Alternativeesc

6th Alternativeescape

7th Alternativespace

8th Alternativepgup

9th Alternativepageup

10th Alternativepgdn

11th Alternativepagedown

12th Alternativeend

13th Alternativehome

14th Alternativeleft

15th Alternativeup

16th Alternativeright

17th Alternativedown

18th Alternativeinsert

19th Alternativedelete

20th Alternative(?<!shift.+)(?:numpad_?[0-9]|numpad_(?:period|decimal))

22nd Alternativef[1-9]

23rd Alternativef1[0-9]

24th Alternativef2[0-4]

25th Alternativeplus

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Search reference

Regular Expression

^(?<modifier>(ctrl|alt|shift)(?:\+(ctrl|alt|shift)(?<!\2))?(?:\+(ctrl|alt|shift)(?<!\2|\3))?\+)?(?<key>[^\s+]|backspace|tab|enter|esc|escape|space|pgup|pageup|pgdn|pagedown|end|home|left|up|right|down|insert|delete|(?<!shift.+)(?:numpad_?[0-9]|numpad_(?:period|decimal))|numpad_(?:multiply|plus|add|minus|subtract|divide)|f[1-9]|f1[0-9]|f2[0-4]|plus)$

Unit Tests

There are no unit tests, click to add some.