Which module is used for nodeJs operation console input?

Node.js is a popular JavaScript runtime environment that allows you to write server-side applications using JavaScript. Node.js includes many built-in modules that can help you with various tasks. Among them, one module is widely used, which is the readline module.

In Node.js, the readline module is a module related to the operation console. It can easily read the user's input from the console and perform corresponding operations through these inputs. . This module provides an interface to read user input from the terminal and return it as a string or a specific data type. The following is a simple usage example of the readline module.

const readline = require('readline');
const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
});

rl.question('请输入你的姓名:', (answer) => {
    console.log(`你好 ${answer}!`);
    rl.close();
});

In the above code, the readline module is imported into the script and a readline.Interface is created by calling the readline.createInterface() function. object. The program can then wait for the user to enter data at the console by accessing the question() method on the rl object, the first of the question() methods The parameter is the question information asked, and the second parameter is the callback function when the user enters the answer.

In the above example, when the Node.js program is run, the user will be prompted to enter their name, and after entering the name, the callback function will be run and a "Hello" name string will be output.

In addition, in the readline module, there are other commonly used functions, such as:

• rl.prompt(): print prompts and waits for user input.
• rl.on(): Listen for specific events (such as line event, close event, etc.).

In summary, if you need to get user input from a Node.js application, using the readline module is a very simple and effective way.

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