Node.js writeStream.getColorDepth() 方法

writeStream.getColorDepth()方法是 tty 模块中 WriteStream 类的内置应用程序编程接口，用于确定终端支持的颜色。

句法：

const writeStream.getColorDepth([env])

参数：此方法接受包含环境变量的对象作为参数。

返回值：该方法返回此终端支持的颜色数量。

示例 1：文件名：index.js

// Node.js program to demonstrate the
// writeStream.getColorDepth() method
  
// Importing dgram module
var dgram = require('dgram');
  
// Creating and initializing client
// and server socket
var client = dgram.createSocket("udp4");
var server = dgram.createSocket("udp4");
  
// Handling the message event
server.on("message", function (msg) {
  
  // Creating and initializing a
  // WriteStream object
  let WriteStream = process.stdout;
  
  // Getting color depth
  // by using getColorDepth() API
  const col = WriteStream
      .getColorDepth(process.env);
  
  // Displaying the result
  process.stdout.write(msg + col);
  
  // Exiting process
  process.exit();
})
// Binding server with port
.bind(1234, () => {
});
  
// Client sending message to server
client.send("No of color supported is :-  ",
         0, 28, 1234, "localhost");

输出：

No of color supported is :- 24

示例 2：文件名：index.js

// Node.js program to demonstrate the
// writeStream.getColorDepth() method
  
// Creating and initializing a
// WriteStream object
let WriteStream = process.stdout;
  
// Getting color depth
// by using getColorDepth() API
const col = WriteStream.getColorDepth(process.env);
  
// Displaying the result
console.log("No of color supported is :-  " + col);

使用以下命令运行 index.js 文件：

node index.js

输出：

No of color supported is :-  24

参考： https://nodejs.org/dist/latest-v12.x/docs/api/tty.html#tty_writestream_getcolordepth_env