regex101: JavaScript Match Workspace

Non-Capturing Group(?:\r\n|\n|^)

1st Alternative\r\n

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

2nd Alternative\n

\na line-feed (newline) character (ASCII 10)

3rd Alternative^

^start of string

Non-Capturing Group(?:[^'"])*?

*?repeats the group contents below any number of times:

Negated Character Class[^'"]

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

Non-Capturing Group(?:'(?:[^\r\n\\']|\\'|[\\]{2})*'|"(?:[^\r\n\\"]|\\"|[\\]{2})*")*?

*?repeats the group contents below any number of times:

1st Alternative'(?:[^\r\n\\']|\\'|[\\]{2})*'

'the literal ' (39₁₀ / 47₈ / 27₁₆)

Non-Capturing Group(?:[^\r\n\\']|\\'|[\\]{2})*

*repeats the group contents below any number of times:

1st Alternative[^\r\n\\']

Negated Character Class[^\r\n\\']

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

2nd Alternative\\'

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

3rd Alternative[\\]{2}

Character Class[\\]{2}

{2}matches exactly 2 characters from the set below:

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

2nd Alternative"(?:[^\r\n\\"]|\\"|[\\]{2})*"

"the literal " (34₁₀ / 42₈ / 22₁₆)

Non-Capturing Group(?:[^\r\n\\"]|\\"|[\\]{2})*

*repeats the group contents below any number of times:

1st Alternative[^\r\n\\"]

Negated Character Class[^\r\n\\"]

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

2nd Alternative\\"

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

3rd Alternative[\\]{2}

Character Class[\\]{2}

{2}matches exactly 2 characters from the set below:

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

Non-Capturing Group(?:[^'"])*?

*?repeats the group contents below any number of times:

Negated Character Class[^'"]

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

Group 1(\/\*(?:[\s\S]*?)\*\/|\/\/.*)

1st Alternative\/\*(?:[\s\S]*?)\*\/

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

Non-Capturing Group(?:[\s\S]*?)

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

2nd Alternative\/\/.*

Global pattern flags

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

26 tokens

Regular Expression

(?:\r\n|\n|^)(?:[^'"])*?(?:'(?:[^\r\n\\']|\\'|[\\]{2})*'|"(?:[^\r\n\\"]|\\"|[\\]{2})*")*?(?:[^'"])*?(\/\*(?:[\s\S]*?)\*\/|\/\/.*)

New

/* block 1 multi
*/
var b = function(){ /* block 2 contained */ };

"/* invalid block */";

"\" /* invalid block tricky */";

"\\ \\\""; /* valid block tricky */

// Ignore Case: note - collapse regex first, then block comments
var trickiest = /\/* invalid block trickiest */gmi;

Regular Expressions 101

Regular Expression

Substitution