Stability: 0 – Deprecated

This module is pending deprecation. Once a replacement API has been finalized,this module will be fully deprecated. Most end users should not have cause to use this module. Users who absolutely must have the functionality that domains provide may rely on it for the time being but should expect to have to migrate to a different solution in the future.

据此,他们并不真正推荐一个解决方案.但是如何实现类似于下面的功能：

var d = require('domain').create();
d.on('error',function(err) {
  console.log(err);
});
d.run(function() {
  setTimeout(function () {
     throw new Error("Something went really wrong in async code.");
  },1000);
});

因此,这将处理异步事件抛出的错误,但域模块已被弃用.

如何将此代码迁移到更好的东西？

我的用例是,我正在编写一个库,它接受一个函数作为输入,它运行该函数并显示结果(实际上,你可以将它视为单元测试库)：

myLib.it("should do something",function (done) {
   setTimeout(function () {
        // Some async code
        // ...
        // But here an error is thrown
        throw new Error("dummy");
   },1000);
});

显然,我不想在这种情况下崩溃的过程,但我确实想要显示一个很好的错误(所以基本上捕捉这个功能的错误).

目前在图书馆我做：

var err = null;
try {
   fn(callback);
} catch (e) {
   err = e;
}

console.log(err || "Everything went correctly");