How can I read a single line user input with Bun.js?

Bun.js is a relatively new JavaScript runtime environment, similar to Node.js, but designed to provide higher performance and a better developer experience. Reading a single line of user input in Bun.js can be achieved in multiple ways, but the most common approach is to use the built-in stdin method. Here is a step-by-step guide along with example code:

1. Import necessary modules – Bun.js provides the built-in stdin method for reading data from standard input.
2. Create a function to read input – Use the stdin.read method to obtain input. As it is asynchronous, the await keyword is required.
3. Process the input – After reading the input, you can further process or use the data as needed.

Example code:

javascript
// Import Bun's built-in module
const { stdin } = Bun;

async function readSingleLineInput() {
  // Prompt user for input
  console.log("Enter your data:");

  // Read a line of input
  let userInput = await stdin.read();

  // Handle possible newline characters
  userInput = userInput.trim();

  // Output or process user input
  console.log("Your input is:", userInput);

  return userInput;
}

// Call the function
readSingleLineInput();

Code explanation:

• The stdin.read() method reads user input until a newline character (when Enter is pressed) is encountered.
• The trim() method removes whitespace characters (including newline characters) from both ends of the string, which is particularly useful when handling command-line input.
• This function is asynchronous and returns the user input content.

This approach makes reading a single line of user input in the Bun.js environment simple and efficient. In actual development, this can be applied to receiving configuration options, user feedback, or other scenarios requiring command-line interaction with users.