react-native-logs/demo/demo.ts

Performance-aware simple logger for React-Native with namespaces, custom levels and custom transports (colored console, file writing, etc.)

import {
  logger,
  consoleTransport,
  mapConsoleTransport,
  configLoggerType,
  defLvlType,
} from "../src";

var log = logger.createLogger({
  levels: {
    debug: 0,
    info: 1,
    warn: 2,
    error: 3,
  },
  transport: consoleTransport,
  transportOptions: {
    colors: {
      info: "blueBright",
      warn: "yellowBright",
      error: "redBright",
    },
    extensionColors: {
      root: "magenta",
      home: "grey",
      user: "blue",
    },
  },
});

var rootLog = log.extend("root");
var homeLog = log.extend("home");
var userLog = log.extend("user");

log.debug("Simple log");

rootLog.warn("Magenta extension and bright yellow message");
homeLog.error("Gray extension and bright red message");

rootLog.error("Root error log message");

userLog.debug("User logged in correctly");
userLog.error("User wrong password");

rootLog.info("Log Object:", { a: 1, b: 2 });

rootLog.info("Log nested Object:", {
  a: 1,
  b: [{ name: "test", id: 1, arr: [{ arrId: 1 }] }],
});

rootLog.info("Multiple", "strings", ["array1", "array2"]);