File output handler for structured, multilevel & hierarchical loggers based on @thi.ng/rstream
npm install @thi.ng/rstream-log-file
!npm downloads
> [!NOTE]
> This is one of 214 standalone projects, maintained as part
> of the @thi.ng/umbrella monorepo
> and anti-framework.
>
> 🚀 Please help me to work full-time on these projects by sponsoring me on
> GitHub. Thank you! ❤️
- About
- Status
- Installation
- Dependencies
- API
- Authors
- License
File output handler for structured, multilevel & hierarchical loggers based on @thi.ng/rstream. This is a support package for @thi.ng/rstream-log.
STABLE - used in production
Search or submit any issues for this package
``bash`
yarn add @thi.ng/rstream-log-file
ESM import:
`ts`
import * as rlf from "@thi.ng/rstream-log-file";
Browser ESM import:
`html`
For Node.js REPL:
`js`
const rlf = await import("@thi.ng/rstream-log-file");
Package sizes (brotli'd, pre-treeshake): ESM: 109 bytes
`ts
import * as log from "@thi.ng/rstream-log";
import { writeFile } from "@thi.ng/rstream-log-file";
const logger = new log.Logger("main");
// add file output w/ post-filtering (only WARN or ERROR levels)
// and formatted as JSON
const writer = logger
.transform(log.minLevel(log.Level.WARN), log.formatJSON())
.subscribe(writeFile("main.log"));
logger.warn("eek!");
// appended to file:
// {"level":"WARN","id":"main","time":"2018-01-23T09:05:55.647Z","body":["eek!"]}
// optionally, cancel file writer
writer.done();
`
If this project contributes to an academic publication, please cite it as:
`bibtex``
@misc{thing-rstream-log-file,
title = "@thi.ng/rstream-log-file",
author = "Karsten Schmidt",
note = "https://thi.ng/rstream-log-file",
year = 2017
}
© 2017 - 2026 Karsten Schmidt // Apache License 2.0