Using regex to match date format but without square brackets

Question

This is what I have. I only want to match date format YYYY-MM-DD or {{variable-name}}=YYYY-MM-DD which in square brackets. I tried to use the following regex:

This regex for YYYY-MM-DD format:

(\[[\d-]*\])

This accepts {{variable-name}}=YYYY-MM-DD pattern:

(\[{{[\w-_]*}}=[\d-]+\])

These regular expressions are matched date format and square brackets, however, I want to remove square brackets at the same time. How can I excluded square brackets with the non-capturing group (?:).

Test this expression here: regex101

Any suggestions would be appreciated.

Answer 1

Depending on what you want :

• Matching the square brackets but not capturing them :

  \[([\d-]*)\]|\[({{[\w-_]*}}=[\d-]+)\]

See demo.

• Not matching the brackets :

  (?<=\[)([\d-]*)(?=\])|(?<=\[)({{[\w-_]*}}=[\d-]+)(?=\])

See other demo.