customizing-log-levels.md

Customizing Log Levels

Instead of simply providing a name for your Log Levels you can also provide a Log Level Options object:

import col from "picocolors";

createLogger = {
  levels: [
    "Debug",
    { name: "Warn", type: "warn" },
    { name: "Error", type: "error", color: col.red },
    { name: "FATAL", type: "error", color: col.bgRed, colorMode: "full" }
  ]
  /* other options */
};

Required Options

• name: Name of the Log Level. This name (in all lowercase) will be used for the method name of the log level on the Logger.log object.

Available Options

• template: Override for the template. Takes default values from Logger's default template. See also Prefix Template Options
• color: You can add a function from a colors library such as picocolors here as middleware to use colour in your template
• colorMode: Whether to apply the Color Middleware on the entire prefix ("full") or just the %name% variables ("name"). Defaults to "name".
• type: Which console method to use for this Log Level. Can be any
  • of: "log", "warn", "error". Defaults to "log".