Regular Expressions 101

Pro

Positive Lookbehind(?<=\{\{(?:(?!\{\{|}}).)*)

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

Non-Capturing Group(?:(?!\{\{|}}).)*

*repeats the group contents below any number of times:

Negative Lookahead(?!\{\{|}})

1st Alternative\{\{

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

2nd Alternative}}

}}the literal text }}

.any character (except for line terminators)

Negated Character Class[^\s()]+

+matches at least one character outside the set below:

\sany whitespace character

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

Positive Lookahead(?=(?:(?!\{\{|}}).)*}})

Non-Capturing Group(?:(?!\{\{|}}).)*

*repeats the group contents below any number of times:

Negative Lookahead(?!\{\{|}})

1st Alternative\{\{

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

2nd Alternative}}

}}the literal text }}

.any character (except for line terminators)

}}the literal text }}

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

(?<=\{\{(?:(?!\{\{|}}).)*)[^\s()]+(?=(?:(?!\{\{|}}).)*}})

Hi {{username}}, You total is {{ user.total - discount}}, please pay by date {{moment.utc(userPaymentDateTime)}}

Hi {{username}}, You total is {{ user.total - discount}}, please pay by date {{moment.utc(userPaymentDateTime)}}