如何使用log4js向记录器添加/修改颜色？

Question

如何使用log4js库(javascript)自定义记录器的颜色？

const log4js = require("log4js");
const logger = log4js.getLogger();
logger.level = 'debug';

logger.debug(`print this in red.`);
logger.debug(`print this in purple.`);

Answer 1

只要使用术语转义序列即可。

const log4js = require("log4js");
const logger = log4js.getLogger();
logger.level = 'debug';

logger.debug(`print this in \u001b[31mred.`);
logger.debug(`print this in \u001b[35mpurple.`);

根据

man terminal-colors.d

它们如下所示：

               0   to restore default color
               1   for brighter colors
               4   for underlined text
               5   for flashing text
              30   for black foreground
              31   for red foreground
              32   for green foreground
              33   for yellow (or brown) foreground
              34   for blue foreground
              35   for purple foreground
              36   for cyan foreground
              37   for white (or gray) foreground
              40   for black background
              41   for red background
              42   for green background
              43   for yellow (or brown) background
              44   for blue background
              45   for purple background
              46   for cyan background
              47   for white (or gray) background

不同的代码必须用分号;分隔，例如

logger.debug(`print this in \u001b[4;31mred\u001b[0m.`);

将打印下划线和红色的red。