如果我在 html 文件中有以下按钮
<button (click)="doSomething('testing', $event)">Do something</button>
另外，在相应的组件中，我有这个函数
doSomething(testString: string, event){
event.stopPropagation();
console.log(testString + ': I am doing something');
}
是否有应分配给输入的正确类型？事件参数本身是一个对象，但是如果我将其分配给类型对象，则会收到错误$event
属性“stopPropogation”在类型对象上不存在
那么，Typescript会考虑什么输入呢？$event
正如@AlexJ所建议的那样
您传递的事件是 DOM 事件，因此您可以使用 作为类型。$eventEventName
在你的情况下，这个事件是一个MouseEvent，文档说，引用
MouseEvent 接口表示由于用户与指针设备（如鼠标）交互而发生的事件。使用此界面的常见事件包括单击、dblclick、mouseup、mousedown。
在所有这些情况下，您将获得.MouseEvent
另一个例子：如果你有这个代码
<input type="text" (blur)="event($event)"
当事件触发时，您将获得一个焦点事件。
因此，您可以非常简单地执行此操作，控制台记录事件，您将看到与此消息类似的消息，我们将具有事件名称
FocusEvent {isTrusted: true, relatedTarget: null, view: Window, detail: 0, which: 0…}
您可以随时访问文档以获取现有事件的列表。
编辑
您还可以检查 TypeScript dom.generated.d.ts，并移植了所有类型。在您的情况下是事件的一部分，由 扩展。stopPropagation()MouseEvent
一些常用事件及其相关名称（MouseEvent、FocusEvent、TouchEvent、DragEvent、KeyboardEvent）：
| MouseEvent | FocusEvent | TouchEvent | DragEvent | KeyboardEvent |
|:----------:|:----------:|:-----------:|:---------:|:-------------:|
| click | focus | touchstart | drag | keypress |
| mouseup | blur | touchmove | drop | keyup |
| mouseleave | focusin | touchcancel | dragend | keydown |
| mouseover | focusout | touchend | dragover | |
通用事件与以下各项相关联：
如果你在 Typescript 的存储库中挖掘，dom.generated.d.ts 提供了一个全局事件接口（归功于 Eric 的答案），你可以在其中找到第 5419 行的所有事件处理程序映射：
interface GlobalEventHandlersEventMap {
"abort": UIEvent;
"animationcancel": AnimationEvent;
"animationend": AnimationEvent;
"animationiteration": AnimationEvent;
"animationstart": AnimationEvent;
"auxclick": MouseEvent;
"beforeinput": InputEvent;
"blur": FocusEvent;
"canplay": Event;
"canplaythrough": Event;
"change": Event;
"click": MouseEvent;
"close": Event;
"compositionend": CompositionEvent;
"compositionstart": CompositionEvent;
"compositionupdate": CompositionEvent;
"contextmenu": MouseEvent;
"cuechange": Event;
"dblclick": MouseEvent;
"drag": DragEvent;
"dragend": DragEvent;
"dragenter": DragEvent;
"dragleave": DragEvent;
"dragover": DragEvent;
"dragstart": DragEvent;
"drop": DragEvent;
"durationchange": Event;
"emptied": Event;
"ended": Event;
"error": ErrorEvent;
"focus": FocusEvent;
"focusin": FocusEvent;
"focusout": FocusEvent;
"formdata": FormDataEvent;
"gotpointercapture": PointerEvent;
"input": Event;
"invalid": Event;
"keydown": KeyboardEvent;
"keypress": KeyboardEvent;
"keyup": KeyboardEvent;
"load": Event;
"loadeddata": Event;
"loadedmetadata": Event;
"loadstart": Event;
"lostpointercapture": PointerEvent;
"mousedown": MouseEvent;
"mouseenter": MouseEvent;
"mouseleave": MouseEvent;
"mousemove": MouseEvent;
"mouseout": MouseEvent;
"mouseover": MouseEvent;
"mouseup": MouseEvent;
"pause": Event;
"play": Event;
"playing": Event;
"pointercancel": PointerEvent;
"pointerdown": PointerEvent;
"pointerenter": PointerEvent;
"pointerleave": PointerEvent;
"pointermove": PointerEvent;
"pointerout": PointerEvent;
"pointerover": PointerEvent;
"pointerup": PointerEvent;
"progress": ProgressEvent;
"ratechange": Event;
"reset": Event;
"resize": UIEvent;
"scroll": Event;
"securitypolicyviolation": SecurityPolicyViolationEvent;
"seeked": Event;
"seeking": Event;
"select": Event;
"selectionchange": Event;
"selectstart": Event;
"slotchange": Event;
"stalled": Event;
"submit": SubmitEvent;
"suspend": Event;
"timeupdate": Event;
"toggle": Event;
"touchcancel": TouchEvent;
"touchend": TouchEvent;
"touchmove": TouchEvent;
"touchstart": TouchEvent;
"transitioncancel": TransitionEvent;
"transitionend": TransitionEvent;
"transitionrun": TransitionEvent;
"transitionstart": TransitionEvent;
"volumechange": Event;
"waiting": Event;
"webkitanimationend": Event;
"webkitanimationiteration": Event;
"webkitanimationstart": Event;
"webkittransitionend": Event;
"wheel": WheelEvent;
}
