98 lines
2.1 KiB
Markdown
98 lines
2.1 KiB
Markdown
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# log-update [](https://travis-ci.org/sindresorhus/log-update)
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> Log by overwriting the previous output in the terminal.<br>
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> Useful for rendering progress bars, animations, etc.
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## Install
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```
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$ npm install log-update
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```
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## Usage
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```js
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const logUpdate = require('log-update');
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const frames = ['-', '\\', '|', '/'];
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let i = 0;
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setInterval(() => {
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const frame = frames[i = ++i % frames.length];
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logUpdate(
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`
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♥♥
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${frame} unicorns ${frame}
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♥♥
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`
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);
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}, 80);
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```
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## API
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### logUpdate(text…)
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Log to stdout.
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### logUpdate.clear()
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Clear the logged output.
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### logUpdate.done()
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Persist the logged output.<br>
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Useful if you want to start a new log session below the current one.
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### logUpdate.stderr(text…)
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Log to stderr.
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### logUpdate.stderr.clear()
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### logUpdate.stderr.done()
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### logUpdate.create(stream, options?)
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Get a `logUpdate` method that logs to the specified stream.
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#### options
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Type: `object`
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##### showCursor
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Type: `boolean`\
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Default: `false`
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Show the cursor. This can be useful when a CLI accepts input from a user.
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```js
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const logUpdate = require('log-update');
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// Write output but don't hide the cursor
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const log = logUpdate.create(process.stdout, {
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showCursor: true
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});
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```
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## Examples
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- [listr](https://github.com/SamVerschueren/listr) - Uses this module to render an interactive task list
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- [ora](https://github.com/sindresorhus/ora) - Uses this module to render awesome spinners
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- [speed-test](https://github.com/sindresorhus/speed-test) - Uses this module to render a [spinner](https://github.com/sindresorhus/elegant-spinner)
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---
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<div align="center">
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<b>
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<a href="https://tidelift.com/subscription/pkg/npm-log-update?utm_source=npm-log-update&utm_medium=referral&utm_campaign=readme">Get professional support for this package with a Tidelift subscription</a>
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</b>
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<br>
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<sub>
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Tidelift helps make open source sustainable for maintainers while giving companies<br>assurances about security, maintenance, and licensing for their dependencies.
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</sub>
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</div>
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