press-any-key

press-any-key

An utility to launch the simplest confirmation dialog.

npx press-any-key
Press any key to continue...

If user presses any key it will exit with code 0. In the case of pressing CTRL+C it will exit with code 1.

Install

If you wish to use the utility from a npm scripts, you can install it into your project as a usual npm dependency.

npm install press-any-key --save-dev

But you can also use npx to invoke the command without install.

npx press-any-key

Arguments

press-any-key <message> [...options]

By the default, the message is "Press any key to continue...", but if you would like you can specify your own message as the first argument.

press-any-key "Press any key to run the application"

Options:

--ctrlc <code> Exit code on pressing CTRL-C. --preserve-log Do not clean the message, after resolve

How to route

You can use standard bash logical operators && and || to perform branching.

npx press-any-key && echo "A good choice!" || echo "Bye bye :("

Or you can rely on the fact that CTRL + C, by default, exits the process.

For example, you have a script that performs irreversible actions, and to avoid accidental execution of the script, you can add additional confirmation.

echo 'You are about to delete all files in current directory'
npx press-any-key
rm -rf *

You are about to delete all files in the current directory
Press any key to continue...

Programmatic usage

You can use the package press-any-key API in your node.js script.

const pressAnyKey = require('press-any-key');

pressAnyKey()
  .then(() => {
    // ... User presses a key
  })

API

pressAnyKey(message, options)

The message is a string that will be displayed in standard output, before it starts to listen for key pressing. Pass null if you'd like to use default message.

Options:

• ctrlC The exit code, or "reject" (do reject the promise), or false to perceive as pressing any key.
• preverseLog Preserve the message in the log

By the default when user presses CTRL+C the function will exit the process. But you able to change the standart behavior of CTRL+C by passing option ctrlC with the value "reject". In this case, pressing CTRL+C wont exit the process, but do reject the promise.

const pressAnyKey = require('press-any-key');

pressAnyKey("Press any key to resolve, or CTRL+C to reject", {
  ctrlC: "reject"
})
  .then(() => {
    console.log('You pressed any key')
  })
  .catch(() => {
    console.log('You pressed CTRL+C')
  })

Author

Vladimir Kalmykov [e-mail]

License

MIT