本文介绍了如何找到未在Node.js UnhandledPromiseRejectionWarning中处理的承诺?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
第7版的Node.js具有用于处理诺言的async/await语法糖，现在在我的代码中经常出现以下警告:
Node.js from version 7 has async/await syntactic sugar for handling promises and now in my code the following warning comes up quite often:
(node:11057) UnhandledPromiseRejectionWarning: Unhandled promise
rejection (rejection id: 1): ReferenceError: Error: Can't set headers
after they are sent.
(node:11057) 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.
不幸的是，没有引用到丢失渔获物的那一行.有没有找到所有方法而无需检查每个try/catch块的方法?
Unfortunately there's no reference to the line where the catch is missing.Is there any way to find it without checking every try/catch block?
推荐答案
listen unhandledRejection event of process.
process.on('unhandledRejection', (reason, p) => {
console.log('Unhandled Rejection at: Promise', p, 'reason:', reason);
// application specific logging, throwing an error, or other logic here
});
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