示例
class Foo {
private pro = new Promise(() => {
throw new Error();
});
public usePro() {
return this.pro.then(() => {});
}
}
let foo = new Foo();
setTimeout(() => {
foo.usePro().then(() => {
console.log("end.");
}).catch(() => {
console.log("error.");
})
}, 1000);
我理解JavaScript无法在运行时知道后面是否会有人捕获错误,那么在这种情况下我应该怎么做呢? 控制台
(node:39166) UnhandledPromiseRejectionWarning: error
(node:39166) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:39166) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
error.
(node:39166) PromiseRejectionHandledWarning: Promise rejection was handled asynchronously (rejection id: 1)