Node.js process.disconnect()方法
原文:https://www . geesforgeks . org/node-js-process-disconnect-method/
process.disconnect() 属性是进程模块的内置应用程序编程接口，子进程使用该接口来断开与父进程的连接。此方法不适用于根进程，因为它没有任何父进程。
语法:
process.disconnect()
参数:不取任何参数。
返回值:没有返回值。
示例 1: 在 Parent.js 中，我们生成子进程。在 Child.js 中，我们在 Child.js 中得到消息。然后如果进程连接为真，则在控制台上打印一条消息并断开连接。
*## 亲子
// Require fork method from child_process
// to spawn child process
const fork = require('child_process').fork;
// Child process file
const child_file = 'Child.js';
// Spawn child process
const child = fork(child_file);
```*
## *亲子*
*```js
console.log('In Child.js')
// If the send method is available
if (process.connected) {
// Check if its connected or not
if (process.connected == true) {
console.log("Child.js is connected.");
}
// Use process.disconnect() to disconnect
process.disconnect();
// Check if its connected or not
if (process.connected == false) {
console.log("Child.js has been disconnected.");
}
}
```*
*使用以下命令运行**父. js**:*
```js
*node Parent.js*
输出:
*In Child.js
Child.js is connected.
Child.js has been disconnected.*
例 2: 一段时间后断开。请注意，断开功能运行后，不会打印任何消息。
*## 亲子
// Require fork method from child_process
// to spawn child process
const fork = require('child_process').fork;
// Child process file
const child_file = 'Child.js';
// Spawn child process
const child = fork(child_file);
```*
## *亲子*
*```js
console.log('In Child.js')
// If the send method is available
if (process.connected) {
// Send multiple messages
setTimeout((function () {
if (process.connected == true) {
console.log("This was sent after 1 second.");
}
}), 1000);
setTimeout((function () {
if (process.connected == true) {
console.log("This was sent after 2 seconds.");
}
}), 2000);
// Disconnect after 2.5 seconds
setTimeout((function () {
process.disconnect();
}), 2500);
setTimeout((function () {
if (process.connected == true) {
console.log("This was sent after 3 seconds.");
}
}), 3000);
}
```*
*使用以下命令运行**父. js**:*
```js
*node Parent.js*
输出:
*In Child.js
Message from child: This was sent after 1 second.
Message from child: This was sent after 2 seconds.*
参考:https://nodejs . org/API/process . html # process _ process _ disconnect
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