所以，我希望我的第一级捕获是处理错误的.有没有办法把我的错误传播到第一个trap ？
参考代码，不起作用(尚未):
Promise = require('./framework/libraries/bluebird.js');
function promise() {
var promise = new Promise(function(resolve, reject) {
throw('Oh no!');
});
promise.catch(function(error) {
throw(error);
});
}
try {
promise();
}
// I WANT THIS CATCH TO CATCH THE ERROR THROWN IN THE PROMISE
catch(error) {
console.log('Caught!', error);
}
有了新的async/await syntax，你可以做到这一点.请注意，在编写本文时，并非所有浏览器都支持这一点，您可能需要使用babel(或类似的东西)来传输代码.
// Because of the "async" keyword here, calling getSomeValue()
// will return a promise.
async function getSomeValue() {
if (somethingIsNotOk) {
throw new Error('uh oh');
} else {
return 'Yay!';
}
}
async function() {
try {
// "await" will wait for the promise to resolve or reject
// if it rejects, an error will be thrown, which you can
// catch with a regular try/catch block
const someValue = await getSomeValue();
doSomethingWith(someValue);
} catch (error) {
console.error(error);
}
}