Popularity
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Stable
Activity
4.4
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1,066
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Monthly Downloads: 0
Programming language: JavaScript
License: MIT License
Tags: Log     Logging     Command Line Utilities     Console     Progress     Term     Terminal     CLI     Stdout     Update     Shell     Logger     Output     Animation     Bar     Overwrite     Refresh    
Latest version: v4.0.0

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README

log-update

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

[](screenshot.gif)

Install

npm install log-update

Usage

import logUpdate from 'log-update';

const frames = ['-', '\\', '|', '/'];
let index = 0;

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

    logUpdate(
`
        β™₯β™₯
   ${frame} unicorns ${frame}
        β™₯β™₯
`
    );
}, 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.

logUpdateStderr(text…)

Log to stderr.

logUpdateStderr.clear()

logUpdateStderr.done()

createLogUpdate(stream, options?)

Get a logUpdate method that logs to the specified stream.

options

Type: object

showCursor

Type: boolean\ Default: false

Show the cursor. This can be useful when a CLI accepts input from a user.

import logUpdate from 'log-update';

// Write output but don't hide the cursor
const log = logUpdate.create(process.stdout, {
    showCursor: true
});

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

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