@zhaoyao91/json-logger

JSON Logger

Opinionated, easy to use, simple JSON logger.

Install

npm install @zhaoyao91/json-logger

Usage

const logger = require("@zhaoyao91/json-logger");

logger.$level();

logger.$level(err);
logger.$level(msg);
logger.$level(det);

logger.$level(err, msg);
logger.$level(err, det);
logger.$level(msg, det);

logger.$level(err, msg, det);

Note: numbers and order of args do matter

Arg order

err -> msg -> det

Arg Types

• err: Error or Object with string fields name, message and stack
• msg: string
• det: plain Object is recommended, though other types are acceptable

Levels

• verbose
• debug
• info
• warn
• error

Envs

LOG_LEVELS

Set which levels should be printed

• Default: info,warn,error

LOG_PRETTY

Set weather the log is printed inline or pretty

• Default: false // which means inline

LOG_TS

Set how ts (timestamp) field will be printed

• Default: string
• Allowed:
  • string // print the ts as local ISO 8601 string, e.g 2019-09-09T03:31:50.027+08:00
  • number // print the ts as js timestamp number, e.g 1567971159492
  • false // do not print ts

License

MIT