typescript - 将属性添加到 HtmlElement

Question

[[WARNING]]:看起来像问题 TypeScript: add type property to HtmlElement但我需要向元素对象添加一个函数，而不是向节点添加属性。

我尝试将 JavaScript 转换为 TypeScript 但我是 TypeScript 的新手，我尝试添加一个新的 el.clickOutsideEvent 函数，但 ts 不允许我这样做:

Vue.directive('click-outside', {
  bind: function (el: HTMLElement, binding: Object, vnode: VNode) {
    // stack-overflow: https://stackoverflow.com/a/42389266/13031497
    el.clickOutsideEvent = function (event: MouseEvent): void {
      if (!(el == event.target) ||
            event.target instanceof Node && el.contains(event.target)) {
        vnode.context[binding.expression](event);
      }
    }
    // ugly, but fix the bug:
    // 2020/11/20 - Peterlits Zo
    // When I click the the ellipsis-h buttom, it do not change anything.
    // I find that itself call this function auto, so I add this after times.
    setTimeout(() => {
      document.body.addEventListener('click', el.clickOutsideEvent)
    }, 50)
  },
  unbind: function (el: HTMLElement) {
    document.body.removeEventListener('click', el.clickOutsideEvent)
  },
})

它告诉我:属性“clickOutsideEvent”在类型“HTMLElement”上不存在。和其他内容。

我应该为它做什么？

Answer 1

我会创建一个从 HTMLElement 扩展的自定义界面。

interface IHTMLElementClicketyClick extends HTMLElement {
  clickOutsideEvent?(event: MouseEvent): void;
}

Vue.directive('click-outside', {
  bind: function (el: IHTMLElementClicketyClick, binding: Object, vnode: VNode) {

  // the rest of the code