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@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 LogLevel
s
(in order of importance):
FINE
DEBUG
INFO
WARN
SEVERE
Logging calls targetting lower levels than configured in the logger will be ignored.
The following logger implementations are provided:
ConsoleLogger
: writes output to console
MemoryLogger
: 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
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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