# Searchable dropdown

> Type to narrow the list, and the matching letters light up in each option.

- Category: [Filters](https://library.aimran.es/components/filters)
- Built with: HTML + CSS
- Live editor: https://library.aimran.es/blocks/uv-f-dd-search
- Library: AIMRAN Library (https://library.aimran.es), free, no sign-up, by Aimran Oukham

## Where to use it

A good fit for a property portal where people choose a city before browsing flats and houses. With a dozen cities or more, scrolling gets tedious; typing three letters is quicker, and the highlight shows why each result matched. It also suits a delivery app choosing a zone. Often searched as a dropdown with search or a combobox.

The search field gets focus as soon as the menu opens, so people can type straight away. Put the most requested cities at the top of the list. And make sure the text still reads well with the highlight colour behind it.

## Code

### HTML

```html
<div class="uv-fds"><button class="tg">Choose city <i><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"><path d="M6 9l6 6 6-6"/></svg></i></button><div class="mn"><label class="sb"><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.2" stroke-linecap="round"><circle cx="11" cy="11" r="7"/><path d="M20 20l-4.3-4.3"/></svg><input placeholder="Search..."></label><div class="ls"><button data-v="Madrid">Madrid</button><button data-v="Barcelona">Barcelona</button><button data-v="Valencia">Valencia</button><button data-v="Sevilla">Sevilla</button><button data-v="Bilbao">Bilbao</button><button data-v="Málaga">Málaga</button><button data-v="Zaragoza">Zaragoza</button></div></div></div>
```

### CSS

```css
.uv-fds {
  --c1: #0071e3;
  --c2: #8ec5ff;
  --s: 16px;
  /* tamaño */
  --k: 1;
  /* velocidad */
  --fg: #1d1d1f;
  /* texto */
  --bg: #f5f5f7;
  /* fondo */
}

.uv-fds {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  color: var(--fg);
  -webkit-tap-highlight-color: transparent;
  position: relative;
  display: inline-block;
}

.uv-fds .tg {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  font-weight: 550;
  line-height: 1;
  padding: .72em 1.25em;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  background: transparent;
  color: var(--fg);
  position: relative;
  transition: color calc(0.32s / var(--k)) cubic-bezier(.25,.1,.25,1),transform calc(0.32s / var(--k)) cubic-bezier(.34,1.56,.64,1);
  display: inline-flex;
  align-items: center;
  gap: .5em;
  background: var(--bg);
  box-shadow: inset 0 0 0 1.5px color-mix(in srgb,var(--fg) 13%,transparent);
}

.uv-fds .tg:hover {
  color: var(--c1);
  box-shadow: inset 0 0 0 1.5px var(--c1);
}

.uv-fds .tg svg {
  width: 1em;
  height: 1em;
}

.uv-fds .tg i {
  display: grid;
  place-items: center;
  transition: transform calc(0.35s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-fds.open .tg i {
  transform: rotate(180deg);
}

.uv-fds .mn {
  position: absolute;
  top: calc(100% + .45em);
  left: 0;
  width: 14em;
  padding: .5em;
  border-radius: 1em;
  background: var(--bg);
  box-shadow: 0 18px 40px rgba(0,0,0,.16);
  transform-origin: top left;
  scale: .94;
  opacity: 0;
  pointer-events: none;
  transition: scale calc(0.32s / var(--k)) cubic-bezier(.34,1.56,.64,1),opacity calc(0.25s / var(--k)) cubic-bezier(.25,.1,.25,1);
  z-index: 3;
}

.uv-fds.open .mn {
  scale: 1;
  opacity: 1;
  pointer-events: auto;
}

.uv-fds .sb {
  display: flex;
  align-items: center;
  gap: .5em;
  padding: .5em .8em;
  border-radius: 999px;
  background: color-mix(in srgb,var(--fg) 7%,transparent);
}

.uv-fds .sb svg {
  width: 1em;
  height: 1em;
  opacity: .5;
  flex: 0 0 auto;
}

.uv-fds .sb input {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: none;
  color: var(--fg);
  font-size: calc(var(--s) * .9);
}

.uv-fds .ls {
  display: flex;
  flex-direction: column;
  max-height: 11em;
  overflow: auto;
  margin-top: .4em;
}

.uv-fds .ls button {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  font-weight: 550;
  line-height: 1;
  padding: .72em 1.25em;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  background: transparent;
  color: var(--fg);
  position: relative;
  transition: color calc(0.32s / var(--k)) cubic-bezier(.25,.1,.25,1),transform calc(0.32s / var(--k)) cubic-bezier(.34,1.56,.64,1);
  text-align: left;
  border-radius: .6em;
  padding: .5em .8em;
  font-weight: 500;
}

.uv-fds .ls button:hover {
  background: color-mix(in srgb,var(--c1) 10%,transparent);
}

.uv-fds .ls button.hide {
  display: none;
}

.uv-fds mark {
  background: color-mix(in srgb,var(--c1) 28%,transparent);
  color: var(--c1);
  border-radius: .25em;
  font-weight: 700;
}
```

### JavaScript

```js
document.querySelectorAll(".uv-fds").forEach(el => {
  const tg=el.querySelector(".tg"),ip=el.querySelector("input");tg.addEventListener("click",e=>{e.stopPropagation();el.classList.toggle("open");if(el.classList.contains("open"))setTimeout(()=>ip.focus(),80)});ip.addEventListener("input",()=>{const q=ip.value.trim().toLowerCase();el.querySelectorAll(".ls button").forEach(b=>{const v=b.dataset.v,i=v.toLowerCase().indexOf(q);b.classList.toggle("hide",q&&i<0);b.innerHTML=q&&i>=0?v.slice(0,i)+"<mark>"+v.slice(i,i+q.length)+"</mark>"+v.slice(i+q.length):v})});el.querySelectorAll(".ls button").forEach(b=>b.addEventListener("click",()=>{tg.childNodes[0].textContent=b.dataset.v+" ";el.classList.remove("open")}));document.addEventListener("click",e=>{if(!el.contains(e.target))el.classList.remove("open")})
});
```

### React

```tsx
// @ts-nocheck: setup() es JavaScript del DOM sin tipos, el mismo de la pestaña JS.
import { useEffect, useRef, type CSSProperties } from "react";

const css = `
.uv-fds {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  color: var(--fg);
  -webkit-tap-highlight-color: transparent;
  position: relative;
  display: inline-block;
}

.uv-fds .tg {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  font-weight: 550;
  line-height: 1;
  padding: .72em 1.25em;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  background: transparent;
  color: var(--fg);
  position: relative;
  transition: color calc(0.32s / var(--k)) cubic-bezier(.25,.1,.25,1),transform calc(0.32s / var(--k)) cubic-bezier(.34,1.56,.64,1);
  display: inline-flex;
  align-items: center;
  gap: .5em;
  background: var(--bg);
  box-shadow: inset 0 0 0 1.5px color-mix(in srgb,var(--fg) 13%,transparent);
}

.uv-fds .tg:hover {
  color: var(--c1);
  box-shadow: inset 0 0 0 1.5px var(--c1);
}

.uv-fds .tg svg {
  width: 1em;
  height: 1em;
}

.uv-fds .tg i {
  display: grid;
  place-items: center;
  transition: transform calc(0.35s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-fds.open .tg i {
  transform: rotate(180deg);
}

.uv-fds .mn {
  position: absolute;
  top: calc(100% + .45em);
  left: 0;
  width: 14em;
  padding: .5em;
  border-radius: 1em;
  background: var(--bg);
  box-shadow: 0 18px 40px rgba(0,0,0,.16);
  transform-origin: top left;
  scale: .94;
  opacity: 0;
  pointer-events: none;
  transition: scale calc(0.32s / var(--k)) cubic-bezier(.34,1.56,.64,1),opacity calc(0.25s / var(--k)) cubic-bezier(.25,.1,.25,1);
  z-index: 3;
}

.uv-fds.open .mn {
  scale: 1;
  opacity: 1;
  pointer-events: auto;
}

.uv-fds .sb {
  display: flex;
  align-items: center;
  gap: .5em;
  padding: .5em .8em;
  border-radius: 999px;
  background: color-mix(in srgb,var(--fg) 7%,transparent);
}

.uv-fds .sb svg {
  width: 1em;
  height: 1em;
  opacity: .5;
  flex: 0 0 auto;
}

.uv-fds .sb input {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: none;
  color: var(--fg);
  font-size: calc(var(--s) * .9);
}

.uv-fds .ls {
  display: flex;
  flex-direction: column;
  max-height: 11em;
  overflow: auto;
  margin-top: .4em;
}

.uv-fds .ls button {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  font-weight: 550;
  line-height: 1;
  padding: .72em 1.25em;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  background: transparent;
  color: var(--fg);
  position: relative;
  transition: color calc(0.32s / var(--k)) cubic-bezier(.25,.1,.25,1),transform calc(0.32s / var(--k)) cubic-bezier(.34,1.56,.64,1);
  text-align: left;
  border-radius: .6em;
  padding: .5em .8em;
  font-weight: 500;
}

.uv-fds .ls button:hover {
  background: color-mix(in srgb,var(--c1) 10%,transparent);
}

.uv-fds .ls button.hide {
  display: none;
}

.uv-fds mark {
  background: color-mix(in srgb,var(--c1) 28%,transparent);
  color: var(--c1);
  border-radius: .25em;
  font-weight: 700;
}
`;

// Interacción en JavaScript del DOM: la misma que en la pestaña JS.
// eslint-disable-next-line @typescript-eslint/no-explicit-any
function setup(el: any) {
  const tg=el.querySelector(".tg"),ip=el.querySelector("input");tg.addEventListener("click",e=>{e.stopPropagation();el.classList.toggle("open");if(el.classList.contains("open"))setTimeout(()=>ip.focus(),80)});ip.addEventListener("input",()=>{const q=ip.value.trim().toLowerCase();el.querySelectorAll(".ls button").forEach(b=>{const v=b.dataset.v,i=v.toLowerCase().indexOf(q);b.classList.toggle("hide",q&&i<0);b.innerHTML=q&&i>=0?v.slice(0,i)+"<mark>"+v.slice(i,i+q.length)+"</mark>"+v.slice(i+q.length):v})});el.querySelectorAll(".ls button").forEach(b=>b.addEventListener("click",()=>{tg.childNodes[0].textContent=b.dataset.v+" ";el.classList.remove("open")}));document.addEventListener("click",e=>{if(!el.contains(e.target))el.classList.remove("open")})
}

export default function FDdSearch() {
  const ref = useRef<HTMLDivElement>(null);

  useEffect(() => {
    const el = ref.current?.firstElementChild;
    return el ? setup(el) : undefined;
  }, []);

  return (
    <>
      <style>{css}</style>
      <div
        ref={ref} style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "16px",
          "--k": "1",
          "--fg": "#1d1d1f",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <div className="uv-fds"><button className="tg">Choose city <i><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.2" strokeLinecap="round" strokeLinejoin="round"><path d="M6 9l6 6 6-6" /></svg></i></button><div className="mn"><label className="sb"><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.2" strokeLinecap="round"><circle cx="11" cy="11" r="7" /><path d="M20 20l-4.3-4.3" /></svg><input placeholder="Search..." /></label><div className="ls"><button data-v="Madrid">Madrid</button><button data-v="Barcelona">Barcelona</button><button data-v="Valencia">Valencia</button><button data-v="Sevilla">Sevilla</button><button data-v="Bilbao">Bilbao</button><button data-v="Málaga">Málaga</button><button data-v="Zaragoza">Zaragoza</button></div></div></div>
      </div>
    </>
  );
}
```

## Prompt for AI assistants

Paste this into ChatGPT, Claude, Cursor, v0 or Lovable to adapt the block to your stack (Tailwind, Vue, Svelte…):

````text
I want to add the “Searchable dropdown” block (Filters) from AIMRAN Library to my project.

## What it is
Type to narrow the list, and the matching letters light up in each option.

## Chosen settings
- Main color: #0071e3
- Secondary color: #8ec5ff
- Size: 16px (from 12 to 24px)
- Speed: 1x (from 0.5 to 2x)

## What I need
1. Add it to my project with the same look and animation as the reference code: same sizes, colours, radii, shadows, timings and easing.
2. It is built with plain HTML and CSS (the reference wraps it in a React component with its CSS). If my project uses something else (Vue, Svelte, Astro, plain HTML…), translate it without losing any behaviour. If I use Tailwind, turn the styles into classes; if not, keep the CSS in its own file.
3. Expose the settings above as props (or CSS variables) with those values as defaults.
4. Make it work well on phones: nothing that depends only on hover, touch targets of at least 44 px and no overflow on 320 px screens.
5. Make it look right in light and dark mode.
6. Keep it accessible: semantic HTML, roles and aria-* where needed, visible focus and keyboard support.
7. Respect prefers-reduced-motion: with reduced motion, no big animations but the same end result.

## Reference code
```tsx
// @ts-nocheck: setup() es JavaScript del DOM sin tipos, el mismo de la pestaña JS.
import { useEffect, useRef, type CSSProperties } from "react";

const css = `
.uv-fds {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  color: var(--fg);
  -webkit-tap-highlight-color: transparent;
  position: relative;
  display: inline-block;
}

.uv-fds .tg {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  font-weight: 550;
  line-height: 1;
  padding: .72em 1.25em;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  background: transparent;
  color: var(--fg);
  position: relative;
  transition: color calc(0.32s / var(--k)) cubic-bezier(.25,.1,.25,1),transform calc(0.32s / var(--k)) cubic-bezier(.34,1.56,.64,1);
  display: inline-flex;
  align-items: center;
  gap: .5em;
  background: var(--bg);
  box-shadow: inset 0 0 0 1.5px color-mix(in srgb,var(--fg) 13%,transparent);
}

.uv-fds .tg:hover {
  color: var(--c1);
  box-shadow: inset 0 0 0 1.5px var(--c1);
}

.uv-fds .tg svg {
  width: 1em;
  height: 1em;
}

.uv-fds .tg i {
  display: grid;
  place-items: center;
  transition: transform calc(0.35s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-fds.open .tg i {
  transform: rotate(180deg);
}

.uv-fds .mn {
  position: absolute;
  top: calc(100% + .45em);
  left: 0;
  width: 14em;
  padding: .5em;
  border-radius: 1em;
  background: var(--bg);
  box-shadow: 0 18px 40px rgba(0,0,0,.16);
  transform-origin: top left;
  scale: .94;
  opacity: 0;
  pointer-events: none;
  transition: scale calc(0.32s / var(--k)) cubic-bezier(.34,1.56,.64,1),opacity calc(0.25s / var(--k)) cubic-bezier(.25,.1,.25,1);
  z-index: 3;
}

.uv-fds.open .mn {
  scale: 1;
  opacity: 1;
  pointer-events: auto;
}

.uv-fds .sb {
  display: flex;
  align-items: center;
  gap: .5em;
  padding: .5em .8em;
  border-radius: 999px;
  background: color-mix(in srgb,var(--fg) 7%,transparent);
}

.uv-fds .sb svg {
  width: 1em;
  height: 1em;
  opacity: .5;
  flex: 0 0 auto;
}

.uv-fds .sb input {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: none;
  color: var(--fg);
  font-size: calc(var(--s) * .9);
}

.uv-fds .ls {
  display: flex;
  flex-direction: column;
  max-height: 11em;
  overflow: auto;
  margin-top: .4em;
}

.uv-fds .ls button {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  font-weight: 550;
  line-height: 1;
  padding: .72em 1.25em;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  background: transparent;
  color: var(--fg);
  position: relative;
  transition: color calc(0.32s / var(--k)) cubic-bezier(.25,.1,.25,1),transform calc(0.32s / var(--k)) cubic-bezier(.34,1.56,.64,1);
  text-align: left;
  border-radius: .6em;
  padding: .5em .8em;
  font-weight: 500;
}

.uv-fds .ls button:hover {
  background: color-mix(in srgb,var(--c1) 10%,transparent);
}

.uv-fds .ls button.hide {
  display: none;
}

.uv-fds mark {
  background: color-mix(in srgb,var(--c1) 28%,transparent);
  color: var(--c1);
  border-radius: .25em;
  font-weight: 700;
}
`;

// Interacción en JavaScript del DOM: la misma que en la pestaña JS.
// eslint-disable-next-line @typescript-eslint/no-explicit-any
function setup(el: any) {
  const tg=el.querySelector(".tg"),ip=el.querySelector("input");tg.addEventListener("click",e=>{e.stopPropagation();el.classList.toggle("open");if(el.classList.contains("open"))setTimeout(()=>ip.focus(),80)});ip.addEventListener("input",()=>{const q=ip.value.trim().toLowerCase();el.querySelectorAll(".ls button").forEach(b=>{const v=b.dataset.v,i=v.toLowerCase().indexOf(q);b.classList.toggle("hide",q&&i<0);b.innerHTML=q&&i>=0?v.slice(0,i)+"<mark>"+v.slice(i,i+q.length)+"</mark>"+v.slice(i+q.length):v})});el.querySelectorAll(".ls button").forEach(b=>b.addEventListener("click",()=>{tg.childNodes[0].textContent=b.dataset.v+" ";el.classList.remove("open")}));document.addEventListener("click",e=>{if(!el.contains(e.target))el.classList.remove("open")})
}

export default function FDdSearch() {
  const ref = useRef<HTMLDivElement>(null);

  useEffect(() => {
    const el = ref.current?.firstElementChild;
    return el ? setup(el) : undefined;
  }, []);

  return (
    <>
      <style>{css}</style>
      <div
        ref={ref} style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "16px",
          "--k": "1",
          "--fg": "#1d1d1f",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <div className="uv-fds"><button className="tg">Choose city <i><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.2" strokeLinecap="round" strokeLinejoin="round"><path d="M6 9l6 6 6-6" /></svg></i></button><div className="mn"><label className="sb"><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.2" strokeLinecap="round"><circle cx="11" cy="11" r="7" /><path d="M20 20l-4.3-4.3" /></svg><input placeholder="Search..." /></label><div className="ls"><button data-v="Madrid">Madrid</button><button data-v="Barcelona">Barcelona</button><button data-v="Valencia">Valencia</button><button data-v="Sevilla">Sevilla</button><button data-v="Bilbao">Bilbao</button><button data-v="Málaga">Málaga</button><button data-v="Zaragoza">Zaragoza</button></div></div></div>
      </div>
    </>
  );
}
```

Give me the complete final code, ready to paste, and tell me in one line where to put it in my project.
````