javascript - promise catch 中的错误不会触发全局错误处理程序

Question

为什么在 promise reject/catch 方法中抛出的错误不会触发全局错误处理程序？如何创建包含这些的全局错误处理程序？在我的应用程序中，全局错误处理程序会记录错误。

function doPromise() {
    return Promise.reject()
}

window.addEventListener('error', function (e) { console.log('Global handler ' + e.message) })

doPromise()
 .then()
 .catch(e => {
    console.log('Promise catch')
    throw new Error('Promise catch error')  // Does not trigger global error handler
  })
    
throw new Error('Core error')  // To prove global error handler is working

Answer 1

这不是错误，而是Unhandled Rejection :

The unhandledrejection event is sent to the global scope of a script when a JavaScript Promise that has no rejection handler is rejected

代码的工作版本:

function doPromise() {
    return Promise.reject()
}

window.addEventListener('error', function(e) {
    console.log('Global handler ' + e.message)
})
window.addEventListener('unhandledrejection', event=>{
    console.log('Unhandled rejection', event)
}
);

doPromise().then().catch(e=>{
    console.log('Promise catch')
    throw new Error('Promise catch error')
    // Does not trigger global error handler
}
)

throw new Error('Core error')
// To prove global error handler is working