Javascript 你如何在Typescript中找到事件的类型
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How do you find the type of event in Typescript
提问by Kevin
Here is my template
这是我的模板
<input (keyup)="onKey($event)">
Here is my typescript file
这是我的打字稿文件
onKey(event:any) {
console.log(typeof event);
}
The console.logoutputs objectbut in reality it should be KeyboardEvent.
该console.log输出object但在现实中它应该是KeyboardEvent。
Is there a generic way to find the type of event?
有没有通用的方法来查找事件的类型？
回答by Aaron Beall
You probably want to just check the event.typeto see what it is, and infer the type from that.
您可能只想检查event.type以查看它是什么，并从中推断出类型。
Otherwise you could try using event instanceof KeyboardEventor user-defined type guards.
否则，您可以尝试使用event instanceof KeyboardEvent或用户定义的类型保护。
Also, in your example you can just make the argument event:KeyboardEventinstead of event:any.
此外，在您的示例中，您可以只使用参数event:KeyboardEvent而不是event:any.
