How I trigger the "System Bell" in nodejs

Question

I'm running a long running custom nodejs script and would like to be notified when the script is completed.

How do I make nodejs trigger the "System Bell"?

The same way as with anything else you run in a console window: output the BEL character (ASCII 7) to the standard output. — Karl Knechtel, Dec 19 '11 at 05:57
@wulong, That worked great, thanks! You should post this as an answer. — Brad, May 14 '12 at 00:29

score 67 · Accepted Answer · edited Feb 02 '23 at 19:57

67

Output the BELL character (Unicode 0007) to the standard output.

console.log('\u0007');

Update 2023

Solution above doesn't work anymore, but writing directly to stdout still works (tested on Node.js v14.20):

process.stdout.write('\u0007');

References

edited Feb 02 '23 at 19:57

dbf

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answered Aug 15 '12 at 18:28

Paul Sweatte

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It works in terminal, but not in terminal inside vscode. – Codler May 25 '20 at 09:35

score 14 · Answer 2 · answered Dec 29 '19 at 13:11

14

The console.log('\u0007') didn't work for me running VSCode on windows 10. The following code did work:

import { exec } from 'child_process'
exec(`rundll32 user32.dll,MessageBeep`)

answered Dec 29 '19 at 13:11

Ronen

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even if the `console.log` version worked for me, it did not work after building an electron app with the code. Your solution also works for electron apps on windows 10. – messerbill Dec 07 '20 at 20:13
one more case, use `>` redirect console output to a file – benbai123 Jul 01 '21 at 12:30

score 2 · Answer 3 · answered Dec 02 '22 at 17:41

I know this question is tagged unix, but I found it from Google so here is a Windows PowerShell solution.

The current answer works fine in Windows, but I wanted something a bit more unique than the standard Windows tone so this worked better for my needs:

const { exec } = require('child_process');

// Single beep
exec("[console]::beep(1000, 500)", {'shell':'powershell.exe'});

// Multiple beeps
exec("1..3 | %{ [console]::beep(1000, 500) }", {'shell':'powershell.exe'});

How I trigger the "System Bell" in nodejs

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