JS Regular expression only 3 matching mode (no single mode) detailed _javascript skills

JS Regular Expression Object mode only has the following three kinds:

G (all occurrences of pattern in full text search)
I (Ignore case)
m (Multiple-line lookup)

That is, there is no single line matching pattern, Singleline (single-line mode): Change the meaning of. So that it matches each character (including the newline character \ n).

such as a String regex = "(? s) (? <=interface) in Java. {0,500} (shutdown) ";---------". " Represents on one line.

But you can use [\d\d] or [\w\w] or [\s\s] or (. | \s) * To solve the problem can not be wrapped

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