domain.bind(callback)

• callback <Function> 回调函数

  ¥callback <Function> The callback function

• 返回：<Function> 绑定的函数

  ¥Returns: <Function> The bound function

返回的函数将是提供的回调函数的封装器。当调用返回的函数时，抛出的任何错误都会被路由到域的 'error' 事件。

¥The returned function will be a wrapper around the supplied callback function. When the returned function is called, any errors that are thrown will be routed to the domain's 'error' event.

const d = domain.create();

function readSomeFile(filename, cb) {
  fs.readFile(filename, 'utf8', d.bind((er, data) => {
    // If this throws, it will also be passed to the domain.
    return cb(er, data ? JSON.parse(data) : null);
  }));
}

d.on('error', (er) => {
  // An error occurred somewhere. If we throw it now, it will crash the program
  // with the normal line number and stack message.
}); 拷贝