Garn Logger

Garn Logger is a utility to enhance the default console logging in JavaScript/TypeScript. It allows you to set logging levels and filter logs based on a query.

Installation

deno add jsr:@garn/logger

or

npx jsr add @garn/logger

Usage

Importing

import { better } from "@garn/logger";

Setting Log Level

You can set the log level to control which logs are displayed. The available levels are error, warn, info, and debug.

better(console).level("warn");

console.error("This is an error"); // Will log
console.warn("This is a warning"); // Will log
console.info("This is an info"); // Will not log
console.debug("This is a debug"); // Will not log

Setting Log Filter

You can filter logs based on a string or regular expression.

better(console).filter("test");

console.error("this is a test"); // Will log
console.warn("another test"); // Will log
console.info("not a match"); // Will not log
console.debug("test again"); // Will log

Using a regular expression:

better(console).filter(/test/i);

console.error("this is a test"); // Will log
console.warn("another test"); // Will log
console.info("not a match"); // Will not log
console.debug("test again"); // Will log

Using mutliple filters acts as an OR operation:

better(console).filter("test","another");

console.error("this is a test"); // Will log
console.warn("another"); // Will log
console.info("not a match"); // Will not log

Or use addFilter to add multiple filters:

better(console).addFilter("test").addFilter("another");
console.error("this is a test"); // Will log
console.warn("another"); // Will log
console.info("not a match"); // Will not log

Reset filter with .resetFilter():

better(console).filter("XXX");
better(console).resetFilter();
console.error("this is a test"); // Will log

Use console.only

You can use console.only to log only this log and filter every log ahead.

better(console)

console.only("logs this"); // Will log
console.error("this is filtered out"); // Will not log

It's a shortcut for:

better(console).filter("logs this");
console.debug("logs this");