20 Tailwind CSS Popovers
07 / 20

All 20 in 20 Tailwind CSS Popovers

  1. 01Tailwind Popover Show and Hide with the Popover API
  2. 02Tailwind Auto vs Manual Popover Behavior
  3. 03Tailwind Anchored Popover with CSS Anchor Positioning
  4. 04Tailwind Popover Entry and Exit Animation
  5. 05Tailwind Popover Backdrop and Light Dismiss
  6. 06Tailwind Position Area Popover Placement Grid
  7. 07Tailwind Popover Flip with Position Try Fallbacks
  8. 08Tailwind Tooltip Arrow Pointing to Anchor
  9. 09Tailwind Dropdown Matching Anchor Width
  10. 10Tailwind Nested Popover Submenu
  11. 11Tailwind Custom Select Listbox Popover
  12. 12Tailwind Tooltip on Hover and Focus
  13. 13Tailwind User Profile Dropdown Menu
  14. 14Tailwind Date Picker Popover
  15. 15Tailwind Filter Dropdown with Checkboxes
  16. 16Tailwind Popover Fallback and Polyfill
  17. 17Tailwind Popover vs Dialog Modal
  18. 18Tailwind Glassmorphism Popover
  19. 19Tailwind Dark Mode Popover Toggle
  20. 20Tailwind Accessible Tooltip with ARIA
Pure TailwindMIT licensed

Tailwind Popover Flip with Position Try Fallbacks

Collision handling was the main reason to install a positioning library. [position-try-fallbacks:flip-block,flip-inline,--tpop07-side] replaces it: list what you accept and the browser tries each until the panel fits. Drag the strip to push the node to an edge and watch the panel change sides. The one thing that stays CSS is the named @position-try block — an at-rule has no utility.

Live Demo
Plain CSSTailwind v4
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The code

<section class="tpop-07 group/root w-full min-h-svh bg-tpop07-bg bg-[repeating-linear-gradient(0deg,transparent_0_3px,oklch(1_0_0/0.018)_3px_4px)] px-3.5 py-9 font-tpop07-mono text-tpop07-ink" aria-label="Popover flip with position-try fallbacks demo">
  <div class="grid min-h-[calc(100svh-72px)] max-w-full place-items-center">
    <div class="w-full min-w-0 max-w-[34rem] border border-tpop07-rule bg-tpop07-surface">
      <div class="flex items-center gap-1.5 border-b border-tpop07-rule px-4 py-2.5" aria-hidden="true">
        <span class="size-2 rounded-full bg-tpop07-rule"></span><span class="size-2 rounded-full bg-tpop07-rule"></span><span class="size-2 rounded-full bg-tpop07-phos"></span>
        <span class="ml-2 text-[11px] text-tpop07-mut">~/cluster/eu-west-1b</span>
      </div>
      <div class="px-4 pt-4 pb-4">
        <p class="mb-3.5 text-[11.5px] uppercase tracking-[0.08em] text-tpop07-mut"><span class="text-tpop07-phos">$</span> drag the strip, then open the node</p>
        <div class="snap-x snap-mandatory overflow-x-auto overscroll-x-contain border border-dashed border-tpop07-rule px-3 py-3.5 [scrollbar-color:var(--color-tpop07-phos)_var(--color-tpop07-surface)]">
          <div class="flex w-max items-center gap-2.5">
            <span class="grid min-h-11 w-19 flex-none snap-center place-items-center border border-tpop07-rule text-[11.5px] text-tpop07-mut">idle</span>
            <span class="grid min-h-11 w-19 flex-none snap-center place-items-center border border-tpop07-rule text-[11.5px] text-tpop07-mut">idle</span>
            <span class="grid min-h-11 w-19 flex-none snap-center place-items-center border border-tpop07-rule text-[11.5px] text-tpop07-mut">idle</span>
            <button id="tpop-07-trigger" type="button" popovertarget="tpop-07-panel" class="inline-flex min-h-11 flex-none cursor-pointer snap-center items-center gap-2 border border-tpop07-phos bg-tpop07-phos px-3.5 text-[12.5px] font-bold text-tpop07-bg transition-[background-color,color,box-shadow] duration-150 [anchor-name:--tpop07-a] hover:shadow-[0_0_18px_oklch(0.86_0.2_150/0.45)] focus-visible:outline-3 focus-visible:outline-offset-2 focus-visible:outline-tpop07-ink group-has-[#tpop-07-panel:popover-open]/root:bg-tpop07-bg group-has-[#tpop-07-panel:popover-open]/root:text-tpop07-phos">
              node-07
              <svg viewBox="0 0 16 16" width="12" height="12" fill="none" stroke="currentColor" stroke-width="2" aria-hidden="true"><path d="M3 8h10M9 4l4 4-4 4"/></svg>
            </button>
            <span class="grid min-h-11 w-19 flex-none snap-center place-items-center border border-tpop07-rule text-[11.5px] text-tpop07-mut">idle</span>
            <span class="grid min-h-11 w-19 flex-none snap-center place-items-center border border-tpop07-rule text-[11.5px] text-tpop07-mut">idle</span>
            <span class="grid min-h-11 w-19 flex-none snap-center place-items-center border border-tpop07-rule text-[11.5px] text-tpop07-mut">idle</span>
          </div>
        </div>
        <ol class="mt-4 grid gap-1.5 text-[12px] leading-normal text-tpop07-mut">
          <li class="min-w-0"><span class="text-tpop07-phos">1</span> · position-area: block-end center</li>
          <li class="min-w-0"><span class="text-tpop07-phos">2</span> · flip-block</li>
          <li class="min-w-0"><span class="text-tpop07-phos">3</span> · flip-inline</li>
          <li class="min-w-0"><span class="text-tpop07-phos">4</span> · @position-try --tpop07-side</li>
        </ol>
      </div>
    </div>
  </div>

  <div popover="auto" id="tpop-07-panel" role="group" aria-label="Node detail" class="fixed m-auto w-[min(17rem,calc(100vw-24px))] border border-tpop07-phos bg-tpop07-surface px-3.5 py-3.5 text-tpop07-ink opacity-0 shadow-[0_0_0_1px_oklch(0.86_0.2_150/0.12),0_18px_40px_-22px_oklch(0.86_0.2_150/0.4)] transition-[opacity,display,overlay] duration-150 transition-discrete [position-anchor:--tpop07-a] [position-area:block-end_center] [position-try-fallbacks:flip-block,flip-inline,--tpop07-side] [position-visibility:anchors-visible] open:opacity-100 starting:open:opacity-0 motion-reduce:transition-none supports-[anchor-name:--a]:inset-auto supports-[anchor-name:--a]:m-0 supports-[anchor-name:--a]:mt-2.5">
    <p class="mb-2.5 text-[12.5px] font-bold tracking-[0.04em] text-tpop07-phos">node-07 · eu-west-1b</p>
    <dl class="mb-1 grid grid-cols-[auto_1fr] gap-x-3 gap-y-1 text-[12px] leading-normal">
      <dt class="text-tpop07-mut">cpu</dt><dd class="flex items-center gap-2">41%<span class="h-1 flex-auto bg-tpop07-rule"><span class="block h-full w-[41%] bg-tpop07-phos"></span></span></dd>
      <dt class="text-tpop07-mut">mem</dt><dd class="flex items-center gap-2">2.8/8 GiB<span class="h-1 flex-auto bg-tpop07-rule"><span class="block h-full w-[35%] bg-tpop07-phos"></span></span></dd>
      <dt class="text-tpop07-mut">pods</dt><dd>14</dd>
      <dt class="text-tpop07-mut">drain</dt><dd>6d ago · Jordan Lee</dd>
    </dl>
    <p class="mt-2.5 border-t border-dashed border-tpop07-rule pt-2.5 text-[11.5px]">I flip rather than clip.<span class="ml-0.5 inline-block w-[0.6ch] animate-pulse bg-tpop07-phos motion-reduce:animate-none">&nbsp;</span></p>
  </div>
</section>
@import "tailwindcss";

@theme {
  --color-tpop07-bg: #060a08;
  --color-tpop07-bg: oklch(0.14 0.01 170);
  --color-tpop07-surface: #0b1411;
  --color-tpop07-surface: oklch(0.18 0.014 170);
  --color-tpop07-ink: #d5f4e2;
  --color-tpop07-ink: oklch(0.94 0.04 160);
  --color-tpop07-mut: #84b198;
  --color-tpop07-mut: oklch(0.72 0.06 160);
  --color-tpop07-phos: #56f487;
  --color-tpop07-phos: oklch(0.86 0.2 150);
  --color-tpop07-rule: #1f332a;
  --color-tpop07-rule: oklch(0.3 0.03 165);
  --font-tpop07-mono: 'JetBrains Mono', ui-monospace, monospace;
}
/* The one at-rule utilities cannot express: a named fallback bundle. Referenced from the panel's
   [position-try-fallbacks:…,--tpop07-side] utility. Ignored by engines without anchoring. */

@position-try --tpop07-side {
  position-area: inline-end center;
  margin: 0 0 0 10px;
  max-inline-size: min(15rem, calc(100vw - 24px));
}
/* Root rule: the full-bleed contract, stated in CSS as well as in the markup's utilities, so the
   stage is sized before the browser build compiles. */

.tpop-07 {
  width: 100%;
  min-height: 100svh;
}

Setup — do this once per project

Skip this if your project already runs Tailwind v4.

1Load Tailwind
<script src="https://cdn.jsdelivr.net/npm/@tailwindcss/browser@4"></script>

Compiles in the browser — perfect for a CodePen or a quick test, not for production.

2Add the stylesheetRequiredthe @theme block is what makes the custom utilities exist
@import "tailwindcss";

@theme {
  --color-tpop07-bg: #060a08;
  --color-tpop07-bg: oklch(0.14 0.01 170);
  --color-tpop07-surface: #0b1411;
  --color-tpop07-surface: oklch(0.18 0.014 170);
  --color-tpop07-ink: #d5f4e2;
  --color-tpop07-ink: oklch(0.94 0.04 160);
  --color-tpop07-mut: #84b198;
  --color-tpop07-mut: oklch(0.72 0.06 160);
  --color-tpop07-phos: #56f487;
  --color-tpop07-phos: oklch(0.86 0.2 150);
  --color-tpop07-rule: #1f332a;
  --color-tpop07-rule: oklch(0.3 0.03 165);
  --font-tpop07-mono: 'JetBrains Mono', ui-monospace, monospace;
}
/* The one at-rule utilities cannot express: a named fallback bundle. Referenced from the panel's
   [position-try-fallbacks:…,--tpop07-side] utility. Ignored by engines without anchoring. */

@position-try --tpop07-side {
  position-area: inline-end center;
  margin: 0 0 0 10px;
  max-inline-size: min(15rem, calc(100vw - 24px));
}
/* Root rule: the full-bleed contract, stated in CSS as well as in the markup's utilities, so the
   stage is sized before the browser build compiles. */

.tpop-07 {
  width: 100%;
  min-height: 100svh;
}
3Fonts used by this demooptional — skip if you have your own type stack
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700;800&display=swap">

What changed in the port

Which parts became utilities, which stayed CSS, and why.

  • The anchored block became four arbitrary properties on the panel; only @position-try --tpop07-side stayed in the stylesheet, because Tailwind cannot mint at-rules.
  • overscroll-behavior-x: contain became overscroll-x-contain; scrollbar-color stayed an arbitrary property reading two theme tokens.
  • UI upgrade from the CSS original: [position-visibility:anchors-visible] is now actually set (the original described it but never shipped it), so the panel disappears when node-07 scrolls out of the strip instead of floating detached.
  • UI upgrade: the strip snaps (snap-x snap-mandatory) so the node lands cleanly at each edge; the node inverts while its panel is open; the panel gained cpu/mem meters and a blinking cursor (stilled under motion-reduce:); muted copy rose from #5e8a75 (3.9:1) to oklch(0.72) (7:1).
Paste this into ChatGPT, Claude, Cursor, or any coding assistant. The block below is pre-framed with everything the AI needs to integrate this demo into your project — markup, styles, scoping notes, and the source URL. Hit Copy and paste straight into your chat.
Here's a working CSS demo from CodeFronts. Use it as-is or adapt to your framework. All classes are scoped under a unique prefix so the code won't collide with your existing styles. MIT licensed.
Demo: Tailwind Popover Flip with Position Try Fallbacks
Source: https://codefronts.com/snippets/tailwind-css-popovers/tailwind-popover-flip-position-try-fallbacks/

Collision handling was the main reason to install a positioning library. [position-try-fallbacks:flip-block,flip-inline,--tpop07-side] replaces it: list what you accept and the browser tries each until the panel fits. Drag the strip to push the node to an edge and watch the panel change sides. The one thing that stays CSS is the named @position-try block — an at-rule has no utility.
## HTML
```html
<section class="tpop-07 group/root w-full min-h-svh bg-tpop07-bg bg-[repeating-linear-gradient(0deg,transparent_0_3px,oklch(1_0_0/0.018)_3px_4px)] px-3.5 py-9 font-tpop07-mono text-tpop07-ink" aria-label="Popover flip with position-try fallbacks demo">
  <div class="grid min-h-[calc(100svh-72px)] max-w-full place-items-center">
    <div class="w-full min-w-0 max-w-[34rem] border border-tpop07-rule bg-tpop07-surface">
      <div class="flex items-center gap-1.5 border-b border-tpop07-rule px-4 py-2.5" aria-hidden="true">
        <span class="size-2 rounded-full bg-tpop07-rule"></span><span class="size-2 rounded-full bg-tpop07-rule"></span><span class="size-2 rounded-full bg-tpop07-phos"></span>
        <span class="ml-2 text-[11px] text-tpop07-mut">~/cluster/eu-west-1b</span>
      </div>
      <div class="px-4 pt-4 pb-4">
        <p class="mb-3.5 text-[11.5px] uppercase tracking-[0.08em] text-tpop07-mut"><span class="text-tpop07-phos">$</span> drag the strip, then open the node</p>
        <div class="snap-x snap-mandatory overflow-x-auto overscroll-x-contain border border-dashed border-tpop07-rule px-3 py-3.5 [scrollbar-color:var(--color-tpop07-phos)_var(--color-tpop07-surface)]">
          <div class="flex w-max items-center gap-2.5">
            <span class="grid min-h-11 w-19 flex-none snap-center place-items-center border border-tpop07-rule text-[11.5px] text-tpop07-mut">idle</span>
            <span class="grid min-h-11 w-19 flex-none snap-center place-items-center border border-tpop07-rule text-[11.5px] text-tpop07-mut">idle</span>
            <span class="grid min-h-11 w-19 flex-none snap-center place-items-center border border-tpop07-rule text-[11.5px] text-tpop07-mut">idle</span>
            <button id="tpop-07-trigger" type="button" popovertarget="tpop-07-panel" class="inline-flex min-h-11 flex-none cursor-pointer snap-center items-center gap-2 border border-tpop07-phos bg-tpop07-phos px-3.5 text-[12.5px] font-bold text-tpop07-bg transition-[background-color,color,box-shadow] duration-150 [anchor-name:--tpop07-a] hover:shadow-[0_0_18px_oklch(0.86_0.2_150/0.45)] focus-visible:outline-3 focus-visible:outline-offset-2 focus-visible:outline-tpop07-ink group-has-[#tpop-07-panel:popover-open]/root:bg-tpop07-bg group-has-[#tpop-07-panel:popover-open]/root:text-tpop07-phos">
              node-07
              <svg viewBox="0 0 16 16" width="12" height="12" fill="none" stroke="currentColor" stroke-width="2" aria-hidden="true"><path d="M3 8h10M9 4l4 4-4 4"/></svg>
            </button>
            <span class="grid min-h-11 w-19 flex-none snap-center place-items-center border border-tpop07-rule text-[11.5px] text-tpop07-mut">idle</span>
            <span class="grid min-h-11 w-19 flex-none snap-center place-items-center border border-tpop07-rule text-[11.5px] text-tpop07-mut">idle</span>
            <span class="grid min-h-11 w-19 flex-none snap-center place-items-center border border-tpop07-rule text-[11.5px] text-tpop07-mut">idle</span>
          </div>
        </div>
        <ol class="mt-4 grid gap-1.5 text-[12px] leading-normal text-tpop07-mut">
          <li class="min-w-0"><span class="text-tpop07-phos">1</span> · position-area: block-end center</li>
          <li class="min-w-0"><span class="text-tpop07-phos">2</span> · flip-block</li>
          <li class="min-w-0"><span class="text-tpop07-phos">3</span> · flip-inline</li>
          <li class="min-w-0"><span class="text-tpop07-phos">4</span> · @position-try --tpop07-side</li>
        </ol>
      </div>
    </div>
  </div>

  <div popover="auto" id="tpop-07-panel" role="group" aria-label="Node detail" class="fixed m-auto w-[min(17rem,calc(100vw-24px))] border border-tpop07-phos bg-tpop07-surface px-3.5 py-3.5 text-tpop07-ink opacity-0 shadow-[0_0_0_1px_oklch(0.86_0.2_150/0.12),0_18px_40px_-22px_oklch(0.86_0.2_150/0.4)] transition-[opacity,display,overlay] duration-150 transition-discrete [position-anchor:--tpop07-a] [position-area:block-end_center] [position-try-fallbacks:flip-block,flip-inline,--tpop07-side] [position-visibility:anchors-visible] open:opacity-100 starting:open:opacity-0 motion-reduce:transition-none supports-[anchor-name:--a]:inset-auto supports-[anchor-name:--a]:m-0 supports-[anchor-name:--a]:mt-2.5">
    <p class="mb-2.5 text-[12.5px] font-bold tracking-[0.04em] text-tpop07-phos">node-07 · eu-west-1b</p>
    <dl class="mb-1 grid grid-cols-[auto_1fr] gap-x-3 gap-y-1 text-[12px] leading-normal">
      <dt class="text-tpop07-mut">cpu</dt><dd class="flex items-center gap-2">41%<span class="h-1 flex-auto bg-tpop07-rule"><span class="block h-full w-[41%] bg-tpop07-phos"></span></span></dd>
      <dt class="text-tpop07-mut">mem</dt><dd class="flex items-center gap-2">2.8/8 GiB<span class="h-1 flex-auto bg-tpop07-rule"><span class="block h-full w-[35%] bg-tpop07-phos"></span></span></dd>
      <dt class="text-tpop07-mut">pods</dt><dd>14</dd>
      <dt class="text-tpop07-mut">drain</dt><dd>6d ago · Jordan Lee</dd>
    </dl>
    <p class="mt-2.5 border-t border-dashed border-tpop07-rule pt-2.5 text-[11.5px]">I flip rather than clip.<span class="ml-0.5 inline-block w-[0.6ch] animate-pulse bg-tpop07-phos motion-reduce:animate-none">&nbsp;</span></p>
  </div>
</section>
```
## CSS
```css
@import "tailwindcss";

@theme {
  --color-tpop07-bg: #060a08;
  --color-tpop07-bg: oklch(0.14 0.01 170);
  --color-tpop07-surface: #0b1411;
  --color-tpop07-surface: oklch(0.18 0.014 170);
  --color-tpop07-ink: #d5f4e2;
  --color-tpop07-ink: oklch(0.94 0.04 160);
  --color-tpop07-mut: #84b198;
  --color-tpop07-mut: oklch(0.72 0.06 160);
  --color-tpop07-phos: #56f487;
  --color-tpop07-phos: oklch(0.86 0.2 150);
  --color-tpop07-rule: #1f332a;
  --color-tpop07-rule: oklch(0.3 0.03 165);
  --font-tpop07-mono: 'JetBrains Mono', ui-monospace, monospace;
}
/* The one at-rule utilities cannot express: a named fallback bundle. Referenced from the panel's
   [position-try-fallbacks:…,--tpop07-side] utility. Ignored by engines without anchoring. */

@position-try --tpop07-side {
  position-area: inline-end center;
  margin: 0 0 0 10px;
  max-inline-size: min(15rem, calc(100vw - 24px));
}
/* Root rule: the full-bleed contract, stated in CSS as well as in the markup's utilities, so the
   stage is sized before the browser build compiles. */

.tpop-07 {
  width: 100%;
  min-height: 100svh;
}
```

How this works

List placements, stop measuring.

class="[position-anchor:--tpop07-a] [position-area:block-end_center]
  [position-try-fallbacks:flip-block,flip-inline,--tpop07-side]
  [position-visibility:anchors-visible]"

The browser uses the declared area; if the panel overflows it mirrors across the block axis, then the inline axis, then swaps in the named --tpop07-side bundle. First fit wins — no resize observer, no scroll listener.

Why the at-rule stays CSS. @position-try is a named set of positioning declarations (area, margin, max width) swapped in wholesale — that is how you say "beside the anchor, with a different gap", which a plain flip cannot. Tailwind has no utility for defining at-rules, so it lives in the stylesheet next to @theme.

Anchors that scroll away. The node lives in a horizontal scroller. position-visibility: anchors-visible hides the panel once the node leaves the strip's visible area instead of leaving it floating unattached — the original listed this and never set it.

Make it yours

  • Prefer room over order: add [position-try-order:most-height].
  • Diagonal mirror: append flip-block_flip-inline to the fallback list.
  • Place the custom fallback above: change the @position-try block to position-area: block-start center; margin: 0 0 10px;.

Gotchas — read before shipping

  • If every option overflows, the last one wins and the panel clips — the list is a preference order, not a guarantee.
  • Fallbacks only apply to anchored placement; manual top/left ignores them.
  • Keep option sizes stable, or content reflow can oscillate the panel between two fallbacks.

Browser support

ChromeSafariFirefoxEdge
125+26+131+125+

position-try-fallbacks and @position-try ship with anchor positioning; position-visibility is an enhancement where missing. Without anchoring the panel opens centred and unflipped.

Techniques used in this demo

Utilitiesfirst-class utility or variant

scroll-snap-typetw ↗

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