domain.run(fn[, ...args])

• fn <Function>
• ...args <any>

在该域的上下文中运行提供的函数，隐式绑定在该上下文中创建的所有事件触发器、计时器和底层请求。可以选择向函数传递参数。

🌐 Run the supplied function in the context of the domain, implicitly binding all event emitters, timers, and lowlevel requests that are created in that context. Optionally, arguments can be passed to the function.

这是使用域的最基本方式。

🌐 This is the most basic way to use a domain.

const domain = require('node:domain');
const fs = require('node:fs');
const d = domain.create();
d.on('error', (er) => {
  console.error('Caught error!', er);
});
d.run(() => {
  process.nextTick(() => {
    setTimeout(() => { // Simulating some various async stuff
      fs.open('non-existent file', 'r', (er, fd) => {
        if (er) throw er;
        // proceed...
      });
    }, 100);
  });
}); 拷贝

在这个例子中，d.on('error') 处理程序会被触发，而不会导致程序崩溃。

🌐 In this example, the d.on('error') handler will be triggered, rather than crashing the program.