@thi.ng/logger
Advanced tools
This project is part of the @thi.ng/umbrella monorepo.
Types & basis infrastructure for arbitrary logging (w/ default impls).
The types & implementations provided by this package are used in various places throughout the thi.ng/umbrella ecosystem and can be swapped out on demand to customize users' needs.
All loggers based on this basic framework provided by this package support the
following LogLevels
(in order of importance):
FINEDEBUGINFOWARNSEVERELogging calls targetting lower levels than configured in the logger will be ignored.
The following logger implementations are provided:
ConsoleLogger: writes output to consoleMemoryLogger: writes output to in-memory journalNULL_LOGGER: no-op logger, suppresses all outputLog messages can contain any number & types of arguments. No-arg functions can be provided as message arg to avoid evaluation of potentially costly message formatting for suppressed log levels. For example:
import { ConsoleLogger, LogLevel } from "@thi.ng/logger";
const logger = new ConsoleLogger("app", LogLevel.INFO);
const name = "thi.ng";
// eager (standard) arg evaluation
logger.info(`hello, ${name}`);
// [INFO] app: hello, thi.ng
// eager (standard) arg evaluation, but suppressed output
logger.debug("result is", 23 + 42);
// lazy arg evaluation
logger.info("result is", () => 23 + 42);
// [INFO] app: result is 65
STABLE - used in production
Search or submit any issues for this package
yarn add @thi.ng/logger
ES module import:
<script type="module" src="https://cdn.skypack.dev/@thi.ng/logger"></script>
For Node.js REPL:
# with flag only for < v16
node --experimental-repl-await
> const logger = await import("@thi.ng/logger");
Package sizes (gzipped, pre-treeshake): ESM: 553 bytes
None
Several demos in this repo's /examples directory are using this package.
A selection:
| Screenshot | Description | Live demo | Source |
|---|---|---|---|
 | Drawing to floating point offscreen / multi-pass shader pipeline | Demo | Source |
 | Zig-based DOM creation & canvas drawing app | Demo | Source |
TODO
Karsten Schmidt
If this project contributes to an academic publication, please cite it as:
@misc{thing-logger,
title = "@thi.ng/logger",
author = "Karsten Schmidt",
note = "https://thi.ng/logger",
year = 2016
}
© 2016 - 2022 Karsten Schmidt // Apache Software License 2.0
FAQs
Basis types for arbitrary & hierarchical logging
The npm package @thi.ng/logger receives a total of 1,337 weekly downloads. As such, @thi.ng/logger popularity was classified as popular.
We found that @thi.ng/logger demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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