How to Process Chinese Input in Node.js: Trim, Replace, and Output

This article shows how to handle Chinese input in a Node.js program by setting the standard input encoding to UTF-8, listening for data events, trimming whitespace, removing the question particle "吗", and converting question marks to exclamation marks before printing the result.

process.stdin.setEncoding("utf-8");

process.stdin.on("data", input =>
    console.log(
        input.trim()
            .replace(/吗/, "")
            .replace(/\?|？/g, "!")
    )
);

Example outputs for various input strings are:

在吗？
在!
你好？
你好!
能听懂汉语吗？
能听懂汉语!
真的吗？
真的!