@untools/logger/dist/examples/example.js

An enhanced logger for JavaScript/TypeScript that handles DOM elements and circular references

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const index_1 = require("../index");
async function demo() {
    console.log("--- Logger Best Practices Demo ---\n");
    // Set log level to DEBUG to see all logs
    index_1.logger.setLogLevel(3); // LogLevel.DEBUG
    // 1. Basic logging with premium colors
    index_1.logger.info("Starting application...", { version: "1.0.0", mode: "demo" });
    // 2. Child logger with request context (Wide Events pattern)
    const requestLogger = index_1.logger.child({
        _rid: "req_" + Math.random().toString(36).substring(7),
        userId: "user_123",
        path: "/api/checkout",
    });
    requestLogger.info("Incoming request");
    // 3. Accumulating business context
    requestLogger.addContext({
        cartValue: 2499,
        items: 3,
        premium: true,
    });
    // 4. Logging a wide event at completion
    try {
        // Simulate work
        await new Promise((resolve) => setTimeout(resolve, 100));
        requestLogger.info({
            outcome: "success",
            duration_ms: 105,
            status_code: 200,
        });
    }
    catch (error) {
        requestLogger.error("Process failed", error);
    }
    // 5. Deeply nested objects (Pretty Printing)
    index_1.logger.debug("System State", {
        memory: {
            used: "124MB",
            total: "16GB",
            details: {
                heap: "80MB",
                external: "44MB",
            },
        },
        flags: ["alpha", "beta", "gamma"],
        active: true,
    });
    console.log("\n--- Demo Complete ---");
}
demo();