Enable specifying a style whenever using "%[" in a pattern

[Mumeii]

Hi

PatternLayout enable the usage of %[ field. It apply a color theme to subsequent logged text based on the log level

It's nice, but would it be possible to explicitly specify the required color ?

For example, using something like %[{yellow}

It would enable having a stable color scheme for certain parts of the logged lines, such as in %[{yellow}%c%] where the category would always be displayed in yellow, making it extra easy to spot.

I personally prefer having :

• only the displayed log level part of my logs having a dynamic color theme, based on log level
• certain key parts of the logged informations applied a static color theme
• other part applied a default color theme

With the current version of log4js I'm using (v6.7.0), I can't achieve the second point.

The best I can do so far is something like this :
%]%r %[%p%] %c %m

With the currently proposed enhancement, it would be possible to write :
%[{blue}%r %[%p %[{yellow}%c %]%m

which, FMPOV, would make logs reading much easier