逐行读取

\Readline

源代码: lib/readline.js

node:readline 模块提供了一个接口,用于一次一行地从 可读 流(例如 process.stdin)中读取数据。

\The node:readline module provides an interface for reading data from a Readable stream (such as process.stdin) one line at a time.

要使用基于 promise 的 API:

\To use the promise-based APIs:

import * as readline from 'node:readline/promises';const readline = require('node:readline/promises');拷贝

要使用回调和同步的 API:

\To use the callback and sync APIs:

import * as readline from 'node:readline';const readline = require('node:readline');拷贝

下面的简单示例阐明了 node:readline 模块的基本用法。

\The following simple example illustrates the basic use of the node:readline module.

import * as readline from 'node:readline/promises';
import { stdin as input, stdout as output } from 'node:process';
const rl = readline.createInterface({ input, output });
const answer = await rl.question('What do you think of Node.js? ');
console.log(`Thank you for your valuable feedback: ${answer}`);
rl.close();const readline = require('node:readline');
const { stdin: input, stdout: output } = require('node:process');
const rl = readline.createInterface({ input, output });
rl.question('What do you think of Node.js? ', (answer) => {
 // TODO: Log the answer in a database
 console.log(`Thank you for your valuable feedback: ${answer}`);
 rl.close();
});拷贝

一旦调用此代码,则 Node.js 应用将不会终止,直到 readline.Interface 关闭,因为接口在 input 流上等待接收数据。

\Once this code is invoked, the Node.js application will not terminate until the readline.Interface is closed because the interface waits for data to be received on the input stream.