readStream.isTTY属性是tty模块中ReadStream类的内置应用程序编程接口,该接口用于检查读取的流对象是否是tty的实例。对于tty,ReadStream,它将始终返回true。
用法:
const readStream.isTTY
返回值:如果读取流对象是tty的实例,则此属性返回true。
范例1: 文件名:index.js
// Node.js program to demonstrate the
// readStream.isTTY property
// 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 intializing a
// ReadStream object
let ReadStream = process.stdin;
// Checking if it is instance of TTY
// or not by using isTTY() method
const status = ReadStream.isTTY;
// Displaying the result
if (status) {
process.stdout.write(msg
+ "an instant of TTY" + "\n");
} else {
process.stdout.write(msg
+ "not an instant of TTY" + "\n");
}
// Exiting process
process.exit();
})
// Binding server with port
.bind(1234, () => {
});
// Client sending message to server
client.send("It is ", 0, 7, 1234, "localhost");
输出:
It is an instant of TTY
范例2: 文件名:index.js
// Node.js program to demonstrate the
// readStream.isTTY property
// Creating and initializing a
// ReadStream object
let ReadStream = process.stdin;
// Checking if it is instance of TTY
// or not by using isTTY() method
const status = ReadStream.isTTY;
// Displaying the result
if(status) {
console.log("It is an instant of TTY");
} else {
console.log("it is not an instant of TTY");
}
使用以下命令运行index.js文件:
node index.js
输出:
It is an instant of TTY
参考:https://nodejs.org/dist/latest-v12.x/docs/api/tty.html#tty_readstream_istty
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注:本文由纯净天空筛选整理自RohitPrasad3大神的英文原创作品 Node.js readStream.isTTY Property。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。