node js 写按键精灵_带有按键的Node.js Raw模式

男娘i 2023-02-21 14:28 19阅读 0赞

node js 写按键精灵

I find the stuff that people are doing with Node.js incredibly interesting.  You here about people using Node.js to control drones, Arduinos, and a host of other devices.  I took advantage of [Node.js to create a Roku Remote][], a project that was fun and easier than I thought it would be.  There was one piece of this experiment that was difficult, however:  listening for keystrokes within the same shell that executed the script.

我发现人们使用Node.js所做的事情非常有趣。 在这里，您可以了解使用Node.js来控制无人机，Arduino和许多其他设备的人们。 我利用[Node.js创建了一个Roku Remote][Node.js to create a Roku Remote] ，这个项目比我想象的要有趣和容易。 但是，该实验中有一个很困难：在执行脚本的同一shell中侦听击键。

The process for using the remote is as follows:

使用遥控器的过程如下：

1.  Execute the script to connect to your Roku:  `node remote`
    
    执行脚本以连接到Roku： `node remote`
2.  In the same shell, use arrow keys and hot keys to navigate the Roku
    
    在同一外壳中，使用箭头键和热键导航Roku
3.  Press `CONTROL+C` to kill the script
    
    按`CONTROL+C`取消脚本

The following JavaScript code is what I needed to use to both listen for keystrokes within the same shell once the script had been started:

脚本启动后，我需要使用以下JavaScript代码来侦听同一外壳中的击键：

// Readline lets us tap into the process events
    const readline = require('readline');
    
    // Allows us to listen for events from stdin
    readline.emitKeypressEvents(process.stdin);
    
    // Raw mode gets rid of standard keypress events and other
    // functionality Node.js adds by default
    process.stdin.setRawMode(true);
    
    
    // Start the keypress listener for the process
    process.stdin.on('keypress', (str, key) => {
    
        // "Raw" mode so we must do our own kill switch
        if(key.sequence === '\u0003') {
            process.exit();
        }
    
        // User has triggered a keypress, now do whatever we want!
        // ...
    
    });

The code above turns your Node.js script into an active wire for listening to keypress events.  With my Roku Remote, I pass arrow and letter keypress events directly to the Roku via a REST API ([full code here][Node.js to create a Roku Remote]).  I love that Node.js made this so easy -- another reason JavaScript always wins!

上面的代码将您的Node.js脚本变成了一个活跃的线路，用于监听按键事件。 使用Roku Remote，我通过REST API( [此处为完整代码][Node.js to create a Roku Remote] )将箭头和字母按键事件直接传递给Roku。 我喜欢Node.js使其变得如此简单-JavaScript永远赢的另一个原因！

> 翻译自: [https://davidwalsh.name/node-raw-mode][https_davidwalsh.name_node-raw-mode]

node js 写按键精灵

[Node.js to create a Roku Remote]: https://davidwalsh.name/roku-remote
[https_davidwalsh.name_node-raw-mode]: https://davidwalsh.name/node-raw-mode