Question 1

e.g.howtestRegular Expression？

Accepted Answer

inRegexEnterEnterRegular Expression，intestTextEnterwantmatch'sText，matchResultwillLive highlightingShow。

Question 2

SupportswhichRegexFlag？

Accepted Answer

Supports g(allGame)、i(Case Insensitive)、m(manyline)、s(singleline/dotAll)、u(Unicode) Flag。

Question 3

What isCapture group？

Accepted Answer

Capture groupisuseNo.()'sRegexSubsettableStyle，match'sContentwillbysingleandShow，atpoints。