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log-update-async-hook

v2.0.7

Published

log-update fork that uses async-exit-hook internally

Downloads

874,388

Readme

log-update-async-hook Build Status

This is a fork of the log-update by Sindre Sorhus, that uses async-exit-hook to restore terminal cursor state when the process terminates. Usage of exit-hook or signal-exit hook in the original log-update prevents execution of asynchronous operations on signals (SIGTERM, SIGHUP, etc.) in the code of the main application. So I've replaced them by async-exit-hook, rewritten code to allow execution on Node versions below 4.x and bundled some dependencies into the package.

Log by overwriting the previous output in the terminal. Useful for rendering progress bars, animations, etc.

Install

$ npm install --save log-update

Usage

const logUpdate = require('log-update');
const frames = ['-', '\\', '|', '/'];
let i = 0;

setInterval(() => {
	const frame = frames[i = ++i % frames.length];

	logUpdate(
`
        ♥♥
   ${frame} unicorns ${frame}
        ♥♥
`
	);
}, 80);

API

logUpdate(text, ...)

Log to stdout.

logUpdate.clear()

Clear the logged output.

logUpdate.done()

Persist the logged output. Useful if you want to start a new log session below the current one.

logUpdate.stderr(text, ...)

Log to stderr.

logUpdate.stderr.clear()

logUpdate.stderr.done()

logUpdate.create(stream)

Get a logUpdate method that logs to the specified stream.

Examples

  • listr - Uses this module to render an interactive task list
  • ora - Uses this module to render awesome spinners
  • speed-test - Uses this module to render a spinner

License

MIT © Sindre Sorhus