dispatchEvent导致错误，无法在'EventTarget'上执行'dispatchEvent':参数1不是'Event'类型 [英] dispatchEvent Causes error failed to execute 'dispatchEvent' on 'EventTarget': parameter 1 is not of type 'Event'

问题描述

我正在使用Angular2 + TypeScript，当我尝试执行此代码时:

I am using Angular2 + TypeScript and when I try execute this code:

var event = new Event('check');
window.dispatchEvent(event);

此代码导致下一个错误:

This code causing the next error:

无法在'EventTarget'上执行'dispatchEvent':参数1不是'Event'类型.

failed to execute 'dispatchEvent' on 'EventTarget': parameter 1 is not of type 'Event'.

我已经尝试了所有方法，发现可以使用:

I have tried everything, and found out that this will work:

var event = new CustomEvent('check');

问题在于，任何IE都不支持CustomEvent.

Problem is that CustomEvent is not supported by any IE.

另一种可行的方法是:

var event = new Event('CustomEvent');
event.initCustomEvent('check');

问题是不建议使用InitCustomEvent.

Problem is that InitCustomEvent is deprecated.

有什么办法可以避免这种类型的错误?也许在打字稿中的某个地方例外?还是使用任何不被弃用且适用于IE Edge的代码?

Is there anything I can do to avoid this type error? Maybe make an exception somewhere in typescript? Or use any code that is not deprecated and works for IE Edge?

推荐答案

找到了解决方案.

对于某些TypeScript设置，仅当我们插入第二个参数时，新事件就是事件"类型，例如:

For some TypeScript settings, new Event is type of 'Event' only when we insert the second parameter, as this example:

var event = new Event("check", { bubbles: true, cancelable: false });
window.dispatchEvent(event);

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