如何在javascript中获得控制台输入？

Question

我目前正在使用spidermonkey来运行我的JavaScript代码.我想知道是否有一个从控制台获取输入的函数,类似于Python的工作方式:

var = raw_input()  

或者在C++中:

std::cin >> var;

我环顾四周,到目前为止我发现的是如何使用prompt()和confirm()函数从浏览器获取输入.

Answer 1

好旧的readline();

请参阅MDN文档:https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey/Introduction_to_the_JavaScript_shell#readline.28.29

Answer 2

正如您所提到的，prompt适用于一直回到 IE 的浏览器：

var answer = prompt('question', 'defaultAnswer');

对于 Node.js > v7.6，您可以使用console-read-write，它是低级readline模块的包装器：

const io = require('console-read-write');

async function main() {
  // Simple readline scenario
  io.write('I will echo whatever you write!');
  io.write(await io.read());

  // Simple question scenario
  io.write(`hello ${await io.ask('Who are you?')}!`);

  // Since you are not blocking the IO, you can go wild with while loops!
  let saidHi = false;
  while (!saidHi) {
    io.write('Say hi or I will repeat...');
    saidHi = await io.read() === 'hi';
  }

  io.write('Thanks! Now you may leave.');
}

main();
// I will echo whatever you write!
// > ok
// ok
// Who are you? someone
// hello someone!
// Say hi or I will repeat...
// > no
// Say hi or I will repeat...
// > ok
// Say hi or I will repeat...
// > hi
// Thanks! Now you may leave.

披露我是控制台读写的作者和维护者

对于 SpiderMonkey，readline就像@MooGoo和@Zaz建议的那样简单。

Answer 3

在纯JavaScript中,只需response = readline()在打印提示后使用.

在Node.js中,您需要使用readline模块:const readline = require('readline')