Regular Expressions 101

1st Alternative^("([^"]|\\")*?")$

^start of line

Group 1("([^"]|\\")*?")

"the literal " (34₁₀ / 42₈ / 22₁₆)

Group 2([^"]|\\")*?

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

1st Alternative[^"]

Negated Character Class[^"]

"the literal " (34₁₀ / 42₈ / 22₁₆)

2nd Alternative\\"

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

$end of line

2nd Alternative^('([^']|\\')*?')$

^start of line

Group 3('([^']|\\')*?')

'the literal ' (39₁₀ / 47₈ / 27₁₆)

Group 4([^']|\\')*?

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

1st Alternative[^']

Negated Character Class[^']

'the literal ' (39₁₀ / 47₈ / 27₁₆)

2nd Alternative\\'

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

$end of line

3rd Alternative^(`([^`]|\\`)*?`)$

^start of line

Group 5(`([^`]|\\`)*?`)

`the literal ` (96₁₀ / 140₈ / 60₁₆)

Group 6([^`]|\\`)*?

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

1st Alternative[^`]

Negated Character Class[^`]

`the literal ` (96₁₀ / 140₈ / 60₁₆)

2nd Alternative\\`

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

`the literal ` (96₁₀ / 140₈ / 60₁₆)

$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

Detailed match information will be displayed here automatically.

26 tokens

Regular Expression

^("([^"]|\\")*?")$|^('([^']|\\')*?')$|^(`([^`]|\\`)*?`)$

New

// Should pass
"doubleQuotes"
'singleQuote'
"thisis'single'insideDouble"
'thisis"double"insidesSingle'
`this is sometext inside back quote`
"sample\"app\""

// Should fail
"thisis"double"insidesDouble"
'thisis'single'insidesSingle'
`this is sometext `inside` back quote`

Regular Expression

Substitution