Matching mode missing by regular expressions in JS (single row Mode)

The single-row mode allows the decimal point (.) to match any character (from RegEx match tracer) including the line break (\ n ).

According to <Microsoft Windows Script technology> CHM:

The decimal point (.) matches any single character except "\ n. To match any character including '\ n', use a pattern like' [. \ n.

There are only three regular expression object modes:

G (search for all occurrences of the pattern in full text)

I (Case Insensitive)

M (multi-row search)

That is, there is no single row matching mode.

However, as mentioned in the CHM documentTo match any character including '\ n', use a pattern like' [. \ n] '.

(Here is an excerpt from: Regular Expression: how to match all characters)

Decimal point (

.) The number of digits in the middle of [] turns into a real decimal point (\.)

If you do not believe it, you can test it like this:

ASDFASDF <span style = "font-size: 22px"> ASDFASDF </span> ASDFASDF

Regular Expression:

<Span style = \ "font-size \: 22px \"> [^.] + </span>

The matching is successful.

The final result should be either (. | \ n) or (. | \ n)

In the manual, [. \ n] indicates that any character is incorrect (it is also the original saying, haha)