HarmonyOS Web嵌套滚动体验差

import web_webview from '@ohos.web.webview';

@Entry
@Component
export struct WebScrollerDemo {
  private scrollTouchDown: boolean = false;
  private webTouchDown: boolean = false;
  private scrolling: boolean = false;
  private scroller: Scroller = new Scroller()
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Scroll(this.scroller) {
      Column() {
        Text("Scroll Area")
          .width("100%")
          .height(400)
          .backgroundColor(0X330000FF)
          .fontSize(16)
          .textAlign(TextAlign.Center)
        Web({
          controller: this.controller,
          src: "https://www.huawei.com/s?id=1778113237500106256&wfr=spider&for=pc",
        }).height("100%").width("100%")
          .nestedScroll({
            scrollForward: NestedScrollMode.PARENT_FIRST,
            scrollBackward: NestedScrollMode.SELF_FIRST
          })
          .onTouch((event: TouchEvent) => {
            if (event.type == TouchType.Down) {
              this.webTouchDown = true;
            } else if (event.type == TouchType.Up) {
              this.webTouchDown = false;
            }
          })
      }.width("100%")
    }
    .onTouch((event: TouchEvent) => {
      if (event.type == TouchType.Down) {
        this.scrollTouchDown = true;
      } else if (event.type == TouchType.Up) {
        this.scrollTouchDown = false;
      }
    })
    .onScrollFrameBegin((offset: number, state: ScrollState) => {
      let yOffset: number = this.scroller.currentOffset().yOffset
      if (this.scrolling && offset > 0) {
        if (yOffset >= 400) { // 400为上面Text组件高度
          this.controller.scrollBy(0, offset)
          return { offsetRemain: 0 }
        } else if (yOffset + offset > 400) {
          this.controller.scrollBy(0, yOffset + offset - 400)
          return { offsetRemain: 400 - yOffset }
        }
      }
      return { offsetRemain: offset }
    })
    .onScrollStart(() => {
      if (this.scrollTouchDown && !this.webTouchDown) {
        this.scrolling = true;
      }
    })
    .onScrollStop(() => {
      this.scrolling = false;
    })
    .edgeEffect(EdgeEffect.Spring)
    .backgroundColor('#DCDCDC')
    .scrollBar(BarState.On)
    .width('100%')
    .height('100%')
  }
}
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