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<div class="inline-flex" data-controller="popover" data-action="mouseenter->popover#showLater mouseleave->popover#hideLater">
  <a href="" class="font-medium underline" data-popover-target="button">
    @rails
  </a>
  <div popover="hint" class="popover" data-popover-target="menu">
    <div class="flex flex-col p-4">
      <h2 class="text-lg font-semibold">Ruby on Rails</h2>
      <p class="text-sm text-subtle">The webframework that changed the world.</p>
    </div>
  </div>
</div>
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<div class="inline-flex" data-controller="popover" data-action="mouseenter->popover#showLater mouseleave->popover#hideLater">
  <a href="" class="font-medium underline" data-popover-target="button">
    @rails
  </a>
  <div popover="hint" class="popover" data-popover-target="menu">
    <div class="flex flex-col p-4">
      <h2 class="text-lg font-semibold">Ruby on Rails</h2>
      <p class="text-sm text-subtle">The webframework that changed the world.</p>
    </div>
  </div>
</div>
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.popover {
  background-color: var(--color-bg);
  border-radius: var(--rounded-md);
  border-width: var(--border);
  box-shadow: var(--shadow-md);
  color: var(--color-text);
  inline-size: var(--popover-size, max-content);
  /* Setup transition */
  transition-behavior: allow-discrete;
  transition-duration: var(--time-150);
  transition-property: display, overlay, opacity, transform;
  /* Exit stage to */
  opacity: 0;
  transform: var(--scale-95);
  /* On stage */
  &:popover-open {
    opacity: 1; transform: var(--scale-100);
  }
  /* Enter stage from */
  @starting-style {
    &:popover-open {
      opacity: 0; transform: var(--scale-95);
    }
  }
}
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import { Controller } from "@hotwired/stimulus"
import { computePosition, flip, shift, offset, autoUpdate } from "https://esm.sh/@floating-ui/dom@1.6.13?standalone"
export default class extends Controller {
  static targets = [ "button", "menu" ]
  static values  = { placement: { type: String, default: "bottom" } }
  #showTimer = null
  #hideTimer = null
  initialize() {
    this.orient = this.orient.bind(this)
  }
  connect() {
    this.cleanup = autoUpdate(this.buttonTarget, this.menuTarget, this.orient)
  }
  disconnect() {
    this.cleanup()
  }
  show() {
    this.menuTarget.showPopover()
  }
  hide() {
    this.menuTarget.hidePopover()
  }
  toggle() {
    this.menuTarget.togglePopover()
  }
  showLater() {
    clearTimeout(this.#hideTimer)
    this.#showTimer = setTimeout(() => this.show(), 700)
  }
  hideLater() {
    clearTimeout(this.#showTimer)
    this.#hideTimer = setTimeout(() => this.hide(), 300)
  }
  orient() {
    computePosition(this.buttonTarget, this.menuTarget, this.#options).then(({x, y}) => {
      this.menuTarget.style.insetInlineStart = `${x}px`
      this.menuTarget.style.insetBlockStart  = `${y}px`
    })
  }
  get #options() {
    return { placement: this.placementValue, middleware: [offset(4), flip(), shift({padding: 4})] }
  }
}

Dependencies