Question

所以，我一直在尝试复制这段代码： https://github.com/sindresorhus/np/blob/370ef638344ab7115c956b75dc2823850084da39/index.js#L16

它有效。但是，如果承诺失败，我会得到一个“未处理的承诺”警告。如果有的话，catch语句在哪里属于这样的东西？有没有更好的方法来获取这样的信息？

(node:48454) UnhandledPromiseRejectionWarning: Error: Command failed: np patch --no-cleanup


    at makeError (/Users/daghassi/git/build/node_modules/execa/index.js:172:9)
    at Promise.all.then.arr (/Users/daghassi/git/build/node_modules/execa/index.js:277:16)
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:160:7)
(node:48454) 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: 5)
(node:48454) [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.
(node:48454) UnhandledPromiseRejectionWarning: Error: Command failed: np patch --no-cleanup


    at makeError (/Users/daghassi/git/build/node_modules/execa/index.js:172:9)
    at Promise.all.then.arr (/Users/daghassi/git/build/node_modules/execa/index.js:277:16)
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:160:7)
(node:48454) 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: 6)
(node:48454) UnhandledPromiseRejectionWarning: Error: Command failed: np patch --no-cleanup

Answer 1

只需在await调用周围放置一个try / catch块。这应该与调用Promise并提供catch函数相同。

因此，如果您有一个函数getPromise()返回一个承诺，那么您只需执行此操作。

async function asyncFunction() {
    try {
        const result = await getPromise();
    } catch (error) {
        // Add your error handling code here
    }
}

ES6 async / await如何在Observables和stream失败时使用它们？

1 个答案: