A potential index.css of your web app to disable Safari's overscroll bounces effect without affecting other browsers

index.css

html {
  /** Uncomment below to disable Pull to Refresh */
  /* overscroll-behavior: none; */
  height: 100vh;
  width: 100vw;
}
@supports (height: 100dvh) and (width: 100dvw) {
  html {
    height: 100dvh;
    width: 100dvw;
  }
}
body {
  height: 100%;
}
@supports (background: -webkit-named-image(i)) {
  html {
    overflow: hidden;
  }
  body {
    overflow: auto;
  }
}
#root-element-id-of-your-app {
  height: 100%;
}