This project is part of the @thi.ng/umbrella monorepo.
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
yarn add @thi.ng/rstream-log-file// ES module
<script type="module" src="https://unpkg.com/@thi.ng/rstream-log-file?module" crossorigin></script>
// UMD
<script src="https://unpkg.com/@thi.ng/rstream-log-file/lib/index.umd.js" crossorigin></script>Package sizes (gzipped, pre-treeshake): ESM: 129 bytes / CJS: 182 bytes / UMD: 300 bytes
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();Karsten Schmidt
© 2017 - 2020 Karsten Schmidt // Apache Software License 2.0