Category: JavaScript Answers

Sometimes, we want to detect CTRL+C key press in Node.js.

In this article, we’ll look at how to detect CTRL+C key press in Node.js.

How to detect CTRL+C key press in Node.js?

To detect CTRL+C key press in Node.js, we can call process.on with 'SIGINT'.

For instance, we write

process.on('SIGINT', () => {
  console.log("Caught interrupt signal");

  if (shouldExit) {
    process.exit();
  }
});

to call process.on with 'SIGINT' to listen for ctrl+c key press.

The interrupt signal is triggered by ctrl+c.

In the callback, we call process.exit to exit the app if shouldExit is true.

Conclusion

To detect CTRL+C key press in Node.js, we can call process.on with 'SIGINT'.

Sometimes, we want to get full list of users with Mongoose.

In this article, we’ll look at how to get full list of users with Mongoose.

How to get full list of users with Mongoose?

To get full list of users with Mongoose, we can use the User.find method.

For instance, we write

User.find({}, (err, users) => {
  console.log(users)
});

to call User.find with an empty object to retrieve the full list of users.

The full users list is stored in the users parameter as an array.

Conclusion

To get full list of users with Mongoose, we can use the User.find method.

Sometimes, we want to copy to clipboard in Node.js.

In this article, we’ll look at how to copy to clipboard in Node.js.

How to copy to clipboard in Node.js?

To copy to clipboard in Node.js, we can use the clipboardy package.

To install it, we run

npm i clipboardy

Then we run it by writing

const clipboardy = require('clipboardy');

clipboardy.writeSync('hello');
clipboardy.readSync();

to call writeSync with the string we want to copy to the clipboard.

Then we read the clipboard content with readSync.

Conclusion

To copy to clipboard in Node.js, we can use the clipboardy package.

Sometimes, we want to use Node.js connect MemoryStore in production.

In this article, we’ll look at how to use Node.js connect MemoryStore in production.

How to use Node.js connect MemoryStore in production?

To use Node.js connect MemoryStore in production, we can use the cookie-session package.

To install it, we run

npm install cookie-session

Then we use it in our Connect app by writing

app.use(require('cookie-session')({
  //  config
}));

to require the cookie-session module and call it with some options store in the object.

And then we call app.use with the returned middleware to let us use cookie-session as the session store.

Conclusion

To use Node.js connect MemoryStore in production, we can use the cookie-session package.

Sometimes, we want to require file as string with Node.js.

In this article, we’ll look at how to require file as string with Node.js.

How to require file as string with Node.js?

To require file as string with Node.js, we can use fs.readFileSync.

For instance, we write

const fs = require('fs')
const path = require('path')

const css = fs.readFileSync(path.resolve(__dirname, 'email.css'), 'utf8')

to call fs.readFileSync to read the file at path returned by path.resolve(__dirname, 'email.css').

We specify to read the file as a 'utf8' encoded text file.

readFileSync reads the file synchronously just like require.

Conclusion

To require file as string with Node.js, we can use fs.readFileSync.