CSS Country Selector Dropdown With Flags
An accessible country picker with pure-CSS SVG-style flag chips, keyboard arrow navigation, and a smooth discrete-property open animation for shipping and checkout forms.
Published
The code
<div class="cs-01">
<label class="cs-01__label" id="cs-01-lbl">Shipping country</label>
<div class="cs-01__field">
<button type="button" class="cs-01__trigger" id="cs-01-trigger" aria-haspopup="listbox" aria-expanded="false" aria-labelledby="cs-01-lbl cs-01-trigger">
<span class="flag" data-c="us" aria-hidden="true"></span>
<span class="cs-01__val">United States</span>
<svg class="cs-01__chev" viewBox="0 0 24 24" aria-hidden="true"><path d="M6 9l6 6 6-6"/></svg>
</button>
<ul class="cs-01__panel" id="cs-01-panel" role="listbox" aria-labelledby="cs-01-lbl" tabindex="-1">
<li class="cs-01__opt is-sel" role="option" aria-selected="true" data-v="United States"><span class="flag" data-c="us" aria-hidden="true"></span>United States<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
<li class="cs-01__opt" role="option" aria-selected="false" data-v="United Kingdom"><span class="flag" data-c="uk" aria-hidden="true"></span>United Kingdom<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
<li class="cs-01__opt" role="option" aria-selected="false" data-v="Canada"><span class="flag" data-c="ca" aria-hidden="true"></span>Canada<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
<li class="cs-01__opt" role="option" aria-selected="false" data-v="Australia"><span class="flag" data-c="au" aria-hidden="true"></span>Australia<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
<li class="cs-01__opt" role="option" aria-selected="false" data-v="Germany"><span class="flag" data-c="de" aria-hidden="true"></span>Germany<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
<li class="cs-01__opt" role="option" aria-selected="false" data-v="Japan"><span class="flag" data-c="jp" aria-hidden="true"></span>Japan<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
</ul>
</div>
</div><div class="cs-01">
<label class="cs-01__label" id="cs-01-lbl">Shipping country</label>
<div class="cs-01__field">
<button type="button" class="cs-01__trigger" id="cs-01-trigger" aria-haspopup="listbox" aria-expanded="false" aria-labelledby="cs-01-lbl cs-01-trigger">
<span class="flag" data-c="us" aria-hidden="true"></span>
<span class="cs-01__val">United States</span>
<svg class="cs-01__chev" viewBox="0 0 24 24" aria-hidden="true"><path d="M6 9l6 6 6-6"/></svg>
</button>
<ul class="cs-01__panel" id="cs-01-panel" role="listbox" aria-labelledby="cs-01-lbl" tabindex="-1">
<li class="cs-01__opt is-sel" role="option" aria-selected="true" data-v="United States"><span class="flag" data-c="us" aria-hidden="true"></span>United States<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
<li class="cs-01__opt" role="option" aria-selected="false" data-v="United Kingdom"><span class="flag" data-c="uk" aria-hidden="true"></span>United Kingdom<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
<li class="cs-01__opt" role="option" aria-selected="false" data-v="Canada"><span class="flag" data-c="ca" aria-hidden="true"></span>Canada<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
<li class="cs-01__opt" role="option" aria-selected="false" data-v="Australia"><span class="flag" data-c="au" aria-hidden="true"></span>Australia<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
<li class="cs-01__opt" role="option" aria-selected="false" data-v="Germany"><span class="flag" data-c="de" aria-hidden="true"></span>Germany<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
<li class="cs-01__opt" role="option" aria-selected="false" data-v="Japan"><span class="flag" data-c="jp" aria-hidden="true"></span>Japan<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
</ul>
</div>
</div>.cs-01,
.cs-01 *,
.cs-01 *::before,
.cs-01 *::after {
box-sizing: border-box;
margin: 0;
padding: 0;
}
.cs-01 ::selection {
background: #6366f1;
color: #fff;
}
.cs-01 {
--cs-bg: #0e1120;
--cs-surface: #171b2e;
--cs-line: #2a2f4a;
--cs-text: #e6e8f2;
--cs-mut: #8b90ad;
--cs-accent: #6366f1;
--cs-ring: #818cf8;
--cs-radius: 14px;
--cs-dur: .22s;
font-family: 'Segoe UI',system-ui,sans-serif;
background: radial-gradient(120% 120% at 20% 0%,#151933,#0b0e1a);
width: 100%;
min-height: 100vh;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
gap: 10px;
padding: 60px 20px;
color: var(--cs-text);
}
.cs-01__label {
font-size: 13px;
font-weight: 600;
letter-spacing: .3px;
color: var(--cs-mut);
width: 280px;
}
.cs-01__field {
position: relative;
width: 280px;
}
.cs-01__trigger {
width: 100%;
display: flex;
align-items: center;
gap: 11px;
background: var(--cs-surface);
border: 1px solid var(--cs-line);
color: var(--cs-text);
border-radius: var(--cs-radius);
padding: 13px 15px;
font-size: 15px;
cursor: pointer;
transition: border-color var(--cs-dur),box-shadow var(--cs-dur);
}
.cs-01__trigger:hover {
border-color: #3a4066;
}
.cs-01__trigger:focus-visible {
outline: none;
border-color: var(--cs-ring);
box-shadow: 0 0 0 4px rgba(129,140,248,.22);
}
.cs-01__val {
flex: 1;
text-align: left;
}
.cs-01__chev {
width: 18px;
height: 18px;
fill: none;
stroke: var(--cs-mut);
stroke-width: 2.2;
stroke-linecap: round;
stroke-linejoin: round;
transition: transform var(--cs-dur);
}
.cs-01__trigger[aria-expanded="true"] .cs-01__chev {
transform: rotate(180deg);
}
.flag {
width: 24px;
height: 16px;
border-radius: 3px;
flex-shrink: 0;
box-shadow: 0 0 0 1px rgba(255,255,255,.1);
background-size: cover;
}
.flag[data-c="us"] {
background: repeating-linear-gradient(#b22234 0 2px,#fff 2px 4px);
position: relative;
}
.flag[data-c="us"]::before {
content: "";
position: absolute;
inset: 0 60% 46% 0;
background: #3c3b6e;
border-radius: 3px 0 0 0;
}
.flag[data-c="uk"] {
background: linear-gradient(#012169,#012169);
position: relative;
overflow: hidden;
}
.flag[data-c="uk"]::before {
content: "";
position: absolute;
inset: 0;
background: linear-gradient(90deg,transparent 42%,#fff 42% 58%,transparent 58%),linear-gradient(0deg,transparent 38%,#fff 38% 62%,transparent 62%);
}
.flag[data-c="uk"]::after {
content: "";
position: absolute;
inset: 0;
background: linear-gradient(90deg,transparent 45%,#c8102e 45% 55%,transparent 55%),linear-gradient(0deg,transparent 42%,#c8102e 42% 58%,transparent 58%);
}
.flag[data-c="ca"] {
background: linear-gradient(90deg,#d80621 22%,#fff 22% 78%,#d80621 78%);
position: relative;
}
.flag[data-c="ca"]::before {
content: "";
position: absolute;
left: 50%;
top: 50%;
width: 5px;
height: 5px;
background: #d80621;
transform: translate(-50%,-50%) rotate(45deg);
}
.flag[data-c="au"] {
background: #012169;
position: relative;
}
.flag[data-c="au"]::before {
content: "";
position: absolute;
right: 3px;
top: 50%;
width: 3px;
height: 3px;
background: #fff;
border-radius: 50%;
box-shadow: -4px -3px 0 -1px #fff,4px 2px 0 -1px #fff;
}
.flag[data-c="de"] {
background: linear-gradient(#000 0 33%,#dd0000 33% 66%,#ffce00 66%);
}
.flag[data-c="jp"] {
background: #fff;
position: relative;
}
.flag[data-c="jp"]::before {
content: "";
position: absolute;
left: 50%;
top: 50%;
width: 8px;
height: 8px;
background: #bc002d;
border-radius: 50%;
transform: translate(-50%,-50%);
}
.cs-01__panel {
position: absolute;
top: calc(100% + 8px);
left: 0;
right: 0;
z-index: 20;
list-style: none;
background: var(--cs-surface);
border: 1px solid var(--cs-line);
border-radius: var(--cs-radius);
padding: 6px;
box-shadow: 0 24px 50px -12px rgba(0,0,0,.6);
max-height: 260px;
overflow-y: auto;
opacity: 0;
transform: translateY(-8px) scale(.98);
pointer-events: none;
transform-origin: top;
transition: opacity var(--cs-dur) ease,transform var(--cs-dur) cubic-bezier(.16,1,.3,1);
}
.cs-01.is-open .cs-01__panel {
opacity: 1;
transform: translateY(0) scale(1);
pointer-events: auto;
}
.cs-01__opt {
display: flex;
align-items: center;
gap: 11px;
padding: 11px 12px;
border-radius: 9px;
font-size: 15px;
cursor: pointer;
color: var(--cs-text);
transition: background .14s;
}
.cs-01__opt:hover,
.cs-01__opt.is-active {
background: #232842;
}
.cs-01__tick {
width: 17px;
height: 17px;
margin-left: auto;
fill: none;
stroke: var(--cs-accent);
stroke-width: 2.4;
stroke-linecap: round;
stroke-linejoin: round;
opacity: 0;
transition: opacity .14s;
}
.cs-01__opt.is-sel .cs-01__tick {
opacity: 1;
}
.cs-01__opt.is-sel {
color: #fff;
}
@media (prefers-reduced-motion: reduce) {
.cs-01__panel,
.cs-01__chev,
.cs-01__trigger {
transition: none;
}
}.cs-01,
.cs-01 *,
.cs-01 *::before,
.cs-01 *::after {
box-sizing: border-box;
margin: 0;
padding: 0;
}
.cs-01 ::selection {
background: #6366f1;
color: #fff;
}
.cs-01 {
--cs-bg: #0e1120;
--cs-surface: #171b2e;
--cs-line: #2a2f4a;
--cs-text: #e6e8f2;
--cs-mut: #8b90ad;
--cs-accent: #6366f1;
--cs-ring: #818cf8;
--cs-radius: 14px;
--cs-dur: .22s;
font-family: 'Segoe UI',system-ui,sans-serif;
background: radial-gradient(120% 120% at 20% 0%,#151933,#0b0e1a);
width: 100%;
min-height: 100vh;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
gap: 10px;
padding: 60px 20px;
color: var(--cs-text);
}
.cs-01__label {
font-size: 13px;
font-weight: 600;
letter-spacing: .3px;
color: var(--cs-mut);
width: 280px;
}
.cs-01__field {
position: relative;
width: 280px;
}
.cs-01__trigger {
width: 100%;
display: flex;
align-items: center;
gap: 11px;
background: var(--cs-surface);
border: 1px solid var(--cs-line);
color: var(--cs-text);
border-radius: var(--cs-radius);
padding: 13px 15px;
font-size: 15px;
cursor: pointer;
transition: border-color var(--cs-dur),box-shadow var(--cs-dur);
}
.cs-01__trigger:hover {
border-color: #3a4066;
}
.cs-01__trigger:focus-visible {
outline: none;
border-color: var(--cs-ring);
box-shadow: 0 0 0 4px rgba(129,140,248,.22);
}
.cs-01__val {
flex: 1;
text-align: left;
}
.cs-01__chev {
width: 18px;
height: 18px;
fill: none;
stroke: var(--cs-mut);
stroke-width: 2.2;
stroke-linecap: round;
stroke-linejoin: round;
transition: transform var(--cs-dur);
}
.cs-01__trigger[aria-expanded="true"] .cs-01__chev {
transform: rotate(180deg);
}
.flag {
width: 24px;
height: 16px;
border-radius: 3px;
flex-shrink: 0;
box-shadow: 0 0 0 1px rgba(255,255,255,.1);
background-size: cover;
}
.flag[data-c="us"] {
background: repeating-linear-gradient(#b22234 0 2px,#fff 2px 4px);
position: relative;
}
.flag[data-c="us"]::before {
content: "";
position: absolute;
inset: 0 60% 46% 0;
background: #3c3b6e;
border-radius: 3px 0 0 0;
}
.flag[data-c="uk"] {
background: linear-gradient(#012169,#012169);
position: relative;
overflow: hidden;
}
.flag[data-c="uk"]::before {
content: "";
position: absolute;
inset: 0;
background: linear-gradient(90deg,transparent 42%,#fff 42% 58%,transparent 58%),linear-gradient(0deg,transparent 38%,#fff 38% 62%,transparent 62%);
}
.flag[data-c="uk"]::after {
content: "";
position: absolute;
inset: 0;
background: linear-gradient(90deg,transparent 45%,#c8102e 45% 55%,transparent 55%),linear-gradient(0deg,transparent 42%,#c8102e 42% 58%,transparent 58%);
}
.flag[data-c="ca"] {
background: linear-gradient(90deg,#d80621 22%,#fff 22% 78%,#d80621 78%);
position: relative;
}
.flag[data-c="ca"]::before {
content: "";
position: absolute;
left: 50%;
top: 50%;
width: 5px;
height: 5px;
background: #d80621;
transform: translate(-50%,-50%) rotate(45deg);
}
.flag[data-c="au"] {
background: #012169;
position: relative;
}
.flag[data-c="au"]::before {
content: "";
position: absolute;
right: 3px;
top: 50%;
width: 3px;
height: 3px;
background: #fff;
border-radius: 50%;
box-shadow: -4px -3px 0 -1px #fff,4px 2px 0 -1px #fff;
}
.flag[data-c="de"] {
background: linear-gradient(#000 0 33%,#dd0000 33% 66%,#ffce00 66%);
}
.flag[data-c="jp"] {
background: #fff;
position: relative;
}
.flag[data-c="jp"]::before {
content: "";
position: absolute;
left: 50%;
top: 50%;
width: 8px;
height: 8px;
background: #bc002d;
border-radius: 50%;
transform: translate(-50%,-50%);
}
.cs-01__panel {
position: absolute;
top: calc(100% + 8px);
left: 0;
right: 0;
z-index: 20;
list-style: none;
background: var(--cs-surface);
border: 1px solid var(--cs-line);
border-radius: var(--cs-radius);
padding: 6px;
box-shadow: 0 24px 50px -12px rgba(0,0,0,.6);
max-height: 260px;
overflow-y: auto;
opacity: 0;
transform: translateY(-8px) scale(.98);
pointer-events: none;
transform-origin: top;
transition: opacity var(--cs-dur) ease,transform var(--cs-dur) cubic-bezier(.16,1,.3,1);
}
.cs-01.is-open .cs-01__panel {
opacity: 1;
transform: translateY(0) scale(1);
pointer-events: auto;
}
.cs-01__opt {
display: flex;
align-items: center;
gap: 11px;
padding: 11px 12px;
border-radius: 9px;
font-size: 15px;
cursor: pointer;
color: var(--cs-text);
transition: background .14s;
}
.cs-01__opt:hover,
.cs-01__opt.is-active {
background: #232842;
}
.cs-01__tick {
width: 17px;
height: 17px;
margin-left: auto;
fill: none;
stroke: var(--cs-accent);
stroke-width: 2.4;
stroke-linecap: round;
stroke-linejoin: round;
opacity: 0;
transition: opacity .14s;
}
.cs-01__opt.is-sel .cs-01__tick {
opacity: 1;
}
.cs-01__opt.is-sel {
color: #fff;
}
@media (prefers-reduced-motion: reduce) {
.cs-01__panel,
.cs-01__chev,
.cs-01__trigger {
transition: none;
}
}(function(){
var root=document.querySelector('.cs-01');if(!root)return;
var trig=root.querySelector('.cs-01__trigger');
var panel=root.querySelector('.cs-01__panel');
var opts=[].slice.call(root.querySelectorAll('.cs-01__opt'));
var val=root.querySelector('.cs-01__val');
var flag=trig.querySelector('.flag');
var i=opts.findIndex(function(o){return o.classList.contains('is-sel')});
if(i<0)i=0;
function open(){root.classList.add('is-open');trig.setAttribute('aria-expanded','true');mark(i);}
function close(){root.classList.remove('is-open');trig.setAttribute('aria-expanded','false');opts.forEach(function(o){o.classList.remove('is-active')});}
function mark(n){opts.forEach(function(o,k){o.classList.toggle('is-active',k===n)});if(opts[n])opts[n].scrollIntoView({block:'nearest'});}
function pick(n){
opts.forEach(function(o){o.classList.remove('is-sel');o.setAttribute('aria-selected','false')});
var o=opts[n];o.classList.add('is-sel');o.setAttribute('aria-selected','true');
val.textContent=o.dataset.v;flag.setAttribute('data-c',o.querySelector('.flag').getAttribute('data-c'));
i=n;close();trig.focus();
}
trig.addEventListener('click',function(){root.classList.contains('is-open')?close():open();});
opts.forEach(function(o,k){o.addEventListener('click',function(){pick(k);});o.addEventListener('mousemove',function(){mark(k);i=k;});});
trig.addEventListener('keydown',function(e){
if(e.key==='ArrowDown'||e.key==='Enter'||e.key===' '){e.preventDefault();if(!root.classList.contains('is-open'))open();}
});
root.addEventListener('keydown',function(e){
if(!root.classList.contains('is-open'))return;
if(e.key==='ArrowDown'){e.preventDefault();i=(i+1)%opts.length;mark(i);}
else if(e.key==='ArrowUp'){e.preventDefault();i=(i-1+opts.length)%opts.length;mark(i);}
else if(e.key==='Enter'||e.key===' '){e.preventDefault();pick(i);}
else if(e.key==='Escape'){e.preventDefault();close();trig.focus();}
});
document.addEventListener('click',function(e){if(!root.contains(e.target))close();});
})();(function(){
var root=document.querySelector('.cs-01');if(!root)return;
var trig=root.querySelector('.cs-01__trigger');
var panel=root.querySelector('.cs-01__panel');
var opts=[].slice.call(root.querySelectorAll('.cs-01__opt'));
var val=root.querySelector('.cs-01__val');
var flag=trig.querySelector('.flag');
var i=opts.findIndex(function(o){return o.classList.contains('is-sel')});
if(i<0)i=0;
function open(){root.classList.add('is-open');trig.setAttribute('aria-expanded','true');mark(i);}
function close(){root.classList.remove('is-open');trig.setAttribute('aria-expanded','false');opts.forEach(function(o){o.classList.remove('is-active')});}
function mark(n){opts.forEach(function(o,k){o.classList.toggle('is-active',k===n)});if(opts[n])opts[n].scrollIntoView({block:'nearest'});}
function pick(n){
opts.forEach(function(o){o.classList.remove('is-sel');o.setAttribute('aria-selected','false')});
var o=opts[n];o.classList.add('is-sel');o.setAttribute('aria-selected','true');
val.textContent=o.dataset.v;flag.setAttribute('data-c',o.querySelector('.flag').getAttribute('data-c'));
i=n;close();trig.focus();
}
trig.addEventListener('click',function(){root.classList.contains('is-open')?close():open();});
opts.forEach(function(o,k){o.addEventListener('click',function(){pick(k);});o.addEventListener('mousemove',function(){mark(k);i=k;});});
trig.addEventListener('keydown',function(e){
if(e.key==='ArrowDown'||e.key==='Enter'||e.key===' '){e.preventDefault();if(!root.classList.contains('is-open'))open();}
});
root.addEventListener('keydown',function(e){
if(!root.classList.contains('is-open'))return;
if(e.key==='ArrowDown'){e.preventDefault();i=(i+1)%opts.length;mark(i);}
else if(e.key==='ArrowUp'){e.preventDefault();i=(i-1+opts.length)%opts.length;mark(i);}
else if(e.key==='Enter'||e.key===' '){e.preventDefault();pick(i);}
else if(e.key==='Escape'){e.preventDefault();close();trig.focus();}
});
document.addEventListener('click',function(e){if(!root.contains(e.target))close();});
})();Here's a working CSS Custom Select Dropdown 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: CSS Country Selector Dropdown With Flags
Source: https://codefronts.com/components/css-custom-select/css-country-selector-dropdown-with-flags/
An accessible country picker with pure-CSS SVG-style flag chips, keyboard arrow navigation, and a smooth discrete-property open animation for shipping and checkout forms.
## HTML
```html
<div class="cs-01">
<label class="cs-01__label" id="cs-01-lbl">Shipping country</label>
<div class="cs-01__field">
<button type="button" class="cs-01__trigger" id="cs-01-trigger" aria-haspopup="listbox" aria-expanded="false" aria-labelledby="cs-01-lbl cs-01-trigger">
<span class="flag" data-c="us" aria-hidden="true"></span>
<span class="cs-01__val">United States</span>
<svg class="cs-01__chev" viewBox="0 0 24 24" aria-hidden="true"><path d="M6 9l6 6 6-6"/></svg>
</button>
<ul class="cs-01__panel" id="cs-01-panel" role="listbox" aria-labelledby="cs-01-lbl" tabindex="-1">
<li class="cs-01__opt is-sel" role="option" aria-selected="true" data-v="United States"><span class="flag" data-c="us" aria-hidden="true"></span>United States<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
<li class="cs-01__opt" role="option" aria-selected="false" data-v="United Kingdom"><span class="flag" data-c="uk" aria-hidden="true"></span>United Kingdom<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
<li class="cs-01__opt" role="option" aria-selected="false" data-v="Canada"><span class="flag" data-c="ca" aria-hidden="true"></span>Canada<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
<li class="cs-01__opt" role="option" aria-selected="false" data-v="Australia"><span class="flag" data-c="au" aria-hidden="true"></span>Australia<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
<li class="cs-01__opt" role="option" aria-selected="false" data-v="Germany"><span class="flag" data-c="de" aria-hidden="true"></span>Germany<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
<li class="cs-01__opt" role="option" aria-selected="false" data-v="Japan"><span class="flag" data-c="jp" aria-hidden="true"></span>Japan<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
</ul>
</div>
</div>
```
## CSS
```css
.cs-01,
.cs-01 *,
.cs-01 *::before,
.cs-01 *::after {
box-sizing: border-box;
margin: 0;
padding: 0;
}
.cs-01 ::selection {
background: #6366f1;
color: #fff;
}
.cs-01 {
--cs-bg: #0e1120;
--cs-surface: #171b2e;
--cs-line: #2a2f4a;
--cs-text: #e6e8f2;
--cs-mut: #8b90ad;
--cs-accent: #6366f1;
--cs-ring: #818cf8;
--cs-radius: 14px;
--cs-dur: .22s;
font-family: 'Segoe UI',system-ui,sans-serif;
background: radial-gradient(120% 120% at 20% 0%,#151933,#0b0e1a);
width: 100%;
min-height: 100vh;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
gap: 10px;
padding: 60px 20px;
color: var(--cs-text);
}
.cs-01__label {
font-size: 13px;
font-weight: 600;
letter-spacing: .3px;
color: var(--cs-mut);
width: 280px;
}
.cs-01__field {
position: relative;
width: 280px;
}
.cs-01__trigger {
width: 100%;
display: flex;
align-items: center;
gap: 11px;
background: var(--cs-surface);
border: 1px solid var(--cs-line);
color: var(--cs-text);
border-radius: var(--cs-radius);
padding: 13px 15px;
font-size: 15px;
cursor: pointer;
transition: border-color var(--cs-dur),box-shadow var(--cs-dur);
}
.cs-01__trigger:hover {
border-color: #3a4066;
}
.cs-01__trigger:focus-visible {
outline: none;
border-color: var(--cs-ring);
box-shadow: 0 0 0 4px rgba(129,140,248,.22);
}
.cs-01__val {
flex: 1;
text-align: left;
}
.cs-01__chev {
width: 18px;
height: 18px;
fill: none;
stroke: var(--cs-mut);
stroke-width: 2.2;
stroke-linecap: round;
stroke-linejoin: round;
transition: transform var(--cs-dur);
}
.cs-01__trigger[aria-expanded="true"] .cs-01__chev {
transform: rotate(180deg);
}
.flag {
width: 24px;
height: 16px;
border-radius: 3px;
flex-shrink: 0;
box-shadow: 0 0 0 1px rgba(255,255,255,.1);
background-size: cover;
}
.flag[data-c="us"] {
background: repeating-linear-gradient(#b22234 0 2px,#fff 2px 4px);
position: relative;
}
.flag[data-c="us"]::before {
content: "";
position: absolute;
inset: 0 60% 46% 0;
background: #3c3b6e;
border-radius: 3px 0 0 0;
}
.flag[data-c="uk"] {
background: linear-gradient(#012169,#012169);
position: relative;
overflow: hidden;
}
.flag[data-c="uk"]::before {
content: "";
position: absolute;
inset: 0;
background: linear-gradient(90deg,transparent 42%,#fff 42% 58%,transparent 58%),linear-gradient(0deg,transparent 38%,#fff 38% 62%,transparent 62%);
}
.flag[data-c="uk"]::after {
content: "";
position: absolute;
inset: 0;
background: linear-gradient(90deg,transparent 45%,#c8102e 45% 55%,transparent 55%),linear-gradient(0deg,transparent 42%,#c8102e 42% 58%,transparent 58%);
}
.flag[data-c="ca"] {
background: linear-gradient(90deg,#d80621 22%,#fff 22% 78%,#d80621 78%);
position: relative;
}
.flag[data-c="ca"]::before {
content: "";
position: absolute;
left: 50%;
top: 50%;
width: 5px;
height: 5px;
background: #d80621;
transform: translate(-50%,-50%) rotate(45deg);
}
.flag[data-c="au"] {
background: #012169;
position: relative;
}
.flag[data-c="au"]::before {
content: "";
position: absolute;
right: 3px;
top: 50%;
width: 3px;
height: 3px;
background: #fff;
border-radius: 50%;
box-shadow: -4px -3px 0 -1px #fff,4px 2px 0 -1px #fff;
}
.flag[data-c="de"] {
background: linear-gradient(#000 0 33%,#dd0000 33% 66%,#ffce00 66%);
}
.flag[data-c="jp"] {
background: #fff;
position: relative;
}
.flag[data-c="jp"]::before {
content: "";
position: absolute;
left: 50%;
top: 50%;
width: 8px;
height: 8px;
background: #bc002d;
border-radius: 50%;
transform: translate(-50%,-50%);
}
.cs-01__panel {
position: absolute;
top: calc(100% + 8px);
left: 0;
right: 0;
z-index: 20;
list-style: none;
background: var(--cs-surface);
border: 1px solid var(--cs-line);
border-radius: var(--cs-radius);
padding: 6px;
box-shadow: 0 24px 50px -12px rgba(0,0,0,.6);
max-height: 260px;
overflow-y: auto;
opacity: 0;
transform: translateY(-8px) scale(.98);
pointer-events: none;
transform-origin: top;
transition: opacity var(--cs-dur) ease,transform var(--cs-dur) cubic-bezier(.16,1,.3,1);
}
.cs-01.is-open .cs-01__panel {
opacity: 1;
transform: translateY(0) scale(1);
pointer-events: auto;
}
.cs-01__opt {
display: flex;
align-items: center;
gap: 11px;
padding: 11px 12px;
border-radius: 9px;
font-size: 15px;
cursor: pointer;
color: var(--cs-text);
transition: background .14s;
}
.cs-01__opt:hover,
.cs-01__opt.is-active {
background: #232842;
}
.cs-01__tick {
width: 17px;
height: 17px;
margin-left: auto;
fill: none;
stroke: var(--cs-accent);
stroke-width: 2.4;
stroke-linecap: round;
stroke-linejoin: round;
opacity: 0;
transition: opacity .14s;
}
.cs-01__opt.is-sel .cs-01__tick {
opacity: 1;
}
.cs-01__opt.is-sel {
color: #fff;
}
@media (prefers-reduced-motion: reduce) {
.cs-01__panel,
.cs-01__chev,
.cs-01__trigger {
transition: none;
}
}
```
## JavaScript
```js
(function(){
var root=document.querySelector('.cs-01');if(!root)return;
var trig=root.querySelector('.cs-01__trigger');
var panel=root.querySelector('.cs-01__panel');
var opts=[].slice.call(root.querySelectorAll('.cs-01__opt'));
var val=root.querySelector('.cs-01__val');
var flag=trig.querySelector('.flag');
var i=opts.findIndex(function(o){return o.classList.contains('is-sel')});
if(i<0)i=0;
function open(){root.classList.add('is-open');trig.setAttribute('aria-expanded','true');mark(i);}
function close(){root.classList.remove('is-open');trig.setAttribute('aria-expanded','false');opts.forEach(function(o){o.classList.remove('is-active')});}
function mark(n){opts.forEach(function(o,k){o.classList.toggle('is-active',k===n)});if(opts[n])opts[n].scrollIntoView({block:'nearest'});}
function pick(n){
opts.forEach(function(o){o.classList.remove('is-sel');o.setAttribute('aria-selected','false')});
var o=opts[n];o.classList.add('is-sel');o.setAttribute('aria-selected','true');
val.textContent=o.dataset.v;flag.setAttribute('data-c',o.querySelector('.flag').getAttribute('data-c'));
i=n;close();trig.focus();
}
trig.addEventListener('click',function(){root.classList.contains('is-open')?close():open();});
opts.forEach(function(o,k){o.addEventListener('click',function(){pick(k);});o.addEventListener('mousemove',function(){mark(k);i=k;});});
trig.addEventListener('keydown',function(e){
if(e.key==='ArrowDown'||e.key==='Enter'||e.key===' '){e.preventDefault();if(!root.classList.contains('is-open'))open();}
});
root.addEventListener('keydown',function(e){
if(!root.classList.contains('is-open'))return;
if(e.key==='ArrowDown'){e.preventDefault();i=(i+1)%opts.length;mark(i);}
else if(e.key==='ArrowUp'){e.preventDefault();i=(i-1+opts.length)%opts.length;mark(i);}
else if(e.key==='Enter'||e.key===' '){e.preventDefault();pick(i);}
else if(e.key==='Escape'){e.preventDefault();close();trig.focus();}
});
document.addEventListener('click',function(e){if(!root.contains(e.target))close();});
})();
```Here's a working CSS Custom Select Dropdown 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: CSS Country Selector Dropdown With Flags
Source: https://codefronts.com/components/css-custom-select/css-country-selector-dropdown-with-flags/
An accessible country picker with pure-CSS SVG-style flag chips, keyboard arrow navigation, and a smooth discrete-property open animation for shipping and checkout forms.
## HTML
```html
<div class="cs-01">
<label class="cs-01__label" id="cs-01-lbl">Shipping country</label>
<div class="cs-01__field">
<button type="button" class="cs-01__trigger" id="cs-01-trigger" aria-haspopup="listbox" aria-expanded="false" aria-labelledby="cs-01-lbl cs-01-trigger">
<span class="flag" data-c="us" aria-hidden="true"></span>
<span class="cs-01__val">United States</span>
<svg class="cs-01__chev" viewBox="0 0 24 24" aria-hidden="true"><path d="M6 9l6 6 6-6"/></svg>
</button>
<ul class="cs-01__panel" id="cs-01-panel" role="listbox" aria-labelledby="cs-01-lbl" tabindex="-1">
<li class="cs-01__opt is-sel" role="option" aria-selected="true" data-v="United States"><span class="flag" data-c="us" aria-hidden="true"></span>United States<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
<li class="cs-01__opt" role="option" aria-selected="false" data-v="United Kingdom"><span class="flag" data-c="uk" aria-hidden="true"></span>United Kingdom<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
<li class="cs-01__opt" role="option" aria-selected="false" data-v="Canada"><span class="flag" data-c="ca" aria-hidden="true"></span>Canada<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
<li class="cs-01__opt" role="option" aria-selected="false" data-v="Australia"><span class="flag" data-c="au" aria-hidden="true"></span>Australia<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
<li class="cs-01__opt" role="option" aria-selected="false" data-v="Germany"><span class="flag" data-c="de" aria-hidden="true"></span>Germany<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
<li class="cs-01__opt" role="option" aria-selected="false" data-v="Japan"><span class="flag" data-c="jp" aria-hidden="true"></span>Japan<svg class="cs-01__tick" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12l5 5L20 7"/></svg></li>
</ul>
</div>
</div>
```
## CSS
```css
.cs-01,
.cs-01 *,
.cs-01 *::before,
.cs-01 *::after {
box-sizing: border-box;
margin: 0;
padding: 0;
}
.cs-01 ::selection {
background: #6366f1;
color: #fff;
}
.cs-01 {
--cs-bg: #0e1120;
--cs-surface: #171b2e;
--cs-line: #2a2f4a;
--cs-text: #e6e8f2;
--cs-mut: #8b90ad;
--cs-accent: #6366f1;
--cs-ring: #818cf8;
--cs-radius: 14px;
--cs-dur: .22s;
font-family: 'Segoe UI',system-ui,sans-serif;
background: radial-gradient(120% 120% at 20% 0%,#151933,#0b0e1a);
width: 100%;
min-height: 100vh;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
gap: 10px;
padding: 60px 20px;
color: var(--cs-text);
}
.cs-01__label {
font-size: 13px;
font-weight: 600;
letter-spacing: .3px;
color: var(--cs-mut);
width: 280px;
}
.cs-01__field {
position: relative;
width: 280px;
}
.cs-01__trigger {
width: 100%;
display: flex;
align-items: center;
gap: 11px;
background: var(--cs-surface);
border: 1px solid var(--cs-line);
color: var(--cs-text);
border-radius: var(--cs-radius);
padding: 13px 15px;
font-size: 15px;
cursor: pointer;
transition: border-color var(--cs-dur),box-shadow var(--cs-dur);
}
.cs-01__trigger:hover {
border-color: #3a4066;
}
.cs-01__trigger:focus-visible {
outline: none;
border-color: var(--cs-ring);
box-shadow: 0 0 0 4px rgba(129,140,248,.22);
}
.cs-01__val {
flex: 1;
text-align: left;
}
.cs-01__chev {
width: 18px;
height: 18px;
fill: none;
stroke: var(--cs-mut);
stroke-width: 2.2;
stroke-linecap: round;
stroke-linejoin: round;
transition: transform var(--cs-dur);
}
.cs-01__trigger[aria-expanded="true"] .cs-01__chev {
transform: rotate(180deg);
}
.flag {
width: 24px;
height: 16px;
border-radius: 3px;
flex-shrink: 0;
box-shadow: 0 0 0 1px rgba(255,255,255,.1);
background-size: cover;
}
.flag[data-c="us"] {
background: repeating-linear-gradient(#b22234 0 2px,#fff 2px 4px);
position: relative;
}
.flag[data-c="us"]::before {
content: "";
position: absolute;
inset: 0 60% 46% 0;
background: #3c3b6e;
border-radius: 3px 0 0 0;
}
.flag[data-c="uk"] {
background: linear-gradient(#012169,#012169);
position: relative;
overflow: hidden;
}
.flag[data-c="uk"]::before {
content: "";
position: absolute;
inset: 0;
background: linear-gradient(90deg,transparent 42%,#fff 42% 58%,transparent 58%),linear-gradient(0deg,transparent 38%,#fff 38% 62%,transparent 62%);
}
.flag[data-c="uk"]::after {
content: "";
position: absolute;
inset: 0;
background: linear-gradient(90deg,transparent 45%,#c8102e 45% 55%,transparent 55%),linear-gradient(0deg,transparent 42%,#c8102e 42% 58%,transparent 58%);
}
.flag[data-c="ca"] {
background: linear-gradient(90deg,#d80621 22%,#fff 22% 78%,#d80621 78%);
position: relative;
}
.flag[data-c="ca"]::before {
content: "";
position: absolute;
left: 50%;
top: 50%;
width: 5px;
height: 5px;
background: #d80621;
transform: translate(-50%,-50%) rotate(45deg);
}
.flag[data-c="au"] {
background: #012169;
position: relative;
}
.flag[data-c="au"]::before {
content: "";
position: absolute;
right: 3px;
top: 50%;
width: 3px;
height: 3px;
background: #fff;
border-radius: 50%;
box-shadow: -4px -3px 0 -1px #fff,4px 2px 0 -1px #fff;
}
.flag[data-c="de"] {
background: linear-gradient(#000 0 33%,#dd0000 33% 66%,#ffce00 66%);
}
.flag[data-c="jp"] {
background: #fff;
position: relative;
}
.flag[data-c="jp"]::before {
content: "";
position: absolute;
left: 50%;
top: 50%;
width: 8px;
height: 8px;
background: #bc002d;
border-radius: 50%;
transform: translate(-50%,-50%);
}
.cs-01__panel {
position: absolute;
top: calc(100% + 8px);
left: 0;
right: 0;
z-index: 20;
list-style: none;
background: var(--cs-surface);
border: 1px solid var(--cs-line);
border-radius: var(--cs-radius);
padding: 6px;
box-shadow: 0 24px 50px -12px rgba(0,0,0,.6);
max-height: 260px;
overflow-y: auto;
opacity: 0;
transform: translateY(-8px) scale(.98);
pointer-events: none;
transform-origin: top;
transition: opacity var(--cs-dur) ease,transform var(--cs-dur) cubic-bezier(.16,1,.3,1);
}
.cs-01.is-open .cs-01__panel {
opacity: 1;
transform: translateY(0) scale(1);
pointer-events: auto;
}
.cs-01__opt {
display: flex;
align-items: center;
gap: 11px;
padding: 11px 12px;
border-radius: 9px;
font-size: 15px;
cursor: pointer;
color: var(--cs-text);
transition: background .14s;
}
.cs-01__opt:hover,
.cs-01__opt.is-active {
background: #232842;
}
.cs-01__tick {
width: 17px;
height: 17px;
margin-left: auto;
fill: none;
stroke: var(--cs-accent);
stroke-width: 2.4;
stroke-linecap: round;
stroke-linejoin: round;
opacity: 0;
transition: opacity .14s;
}
.cs-01__opt.is-sel .cs-01__tick {
opacity: 1;
}
.cs-01__opt.is-sel {
color: #fff;
}
@media (prefers-reduced-motion: reduce) {
.cs-01__panel,
.cs-01__chev,
.cs-01__trigger {
transition: none;
}
}
```
## JavaScript
```js
(function(){
var root=document.querySelector('.cs-01');if(!root)return;
var trig=root.querySelector('.cs-01__trigger');
var panel=root.querySelector('.cs-01__panel');
var opts=[].slice.call(root.querySelectorAll('.cs-01__opt'));
var val=root.querySelector('.cs-01__val');
var flag=trig.querySelector('.flag');
var i=opts.findIndex(function(o){return o.classList.contains('is-sel')});
if(i<0)i=0;
function open(){root.classList.add('is-open');trig.setAttribute('aria-expanded','true');mark(i);}
function close(){root.classList.remove('is-open');trig.setAttribute('aria-expanded','false');opts.forEach(function(o){o.classList.remove('is-active')});}
function mark(n){opts.forEach(function(o,k){o.classList.toggle('is-active',k===n)});if(opts[n])opts[n].scrollIntoView({block:'nearest'});}
function pick(n){
opts.forEach(function(o){o.classList.remove('is-sel');o.setAttribute('aria-selected','false')});
var o=opts[n];o.classList.add('is-sel');o.setAttribute('aria-selected','true');
val.textContent=o.dataset.v;flag.setAttribute('data-c',o.querySelector('.flag').getAttribute('data-c'));
i=n;close();trig.focus();
}
trig.addEventListener('click',function(){root.classList.contains('is-open')?close():open();});
opts.forEach(function(o,k){o.addEventListener('click',function(){pick(k);});o.addEventListener('mousemove',function(){mark(k);i=k;});});
trig.addEventListener('keydown',function(e){
if(e.key==='ArrowDown'||e.key==='Enter'||e.key===' '){e.preventDefault();if(!root.classList.contains('is-open'))open();}
});
root.addEventListener('keydown',function(e){
if(!root.classList.contains('is-open'))return;
if(e.key==='ArrowDown'){e.preventDefault();i=(i+1)%opts.length;mark(i);}
else if(e.key==='ArrowUp'){e.preventDefault();i=(i-1+opts.length)%opts.length;mark(i);}
else if(e.key==='Enter'||e.key===' '){e.preventDefault();pick(i);}
else if(e.key==='Escape'){e.preventDefault();close();trig.focus();}
});
document.addEventListener('click',function(e){if(!root.contains(e.target))close();});
})();
```How this works
The trigger and listbox are plain buttons wired with role="listbox" and aria-activedescendant, so the whole widget is keyboard driven. Each flag is built from stacked linear-gradient backgrounds on a tiny .flag span — no image assets — and the panel reveals with a transform: translateY() plus opacity transition kept on the compositor.
State lives entirely in an .is-open class toggled in JS, never on document.body. Arrow keys move a data-active index, Enter commits the value into the trigger label, and Escape closes and returns focus to the button so screen-reader flow stays intact.
Make it yours
- Recolor the accent by editing
--cs-accentand--cs-ringon.cs-01. - Add countries by copying an
.cs-01__optrow and giving its.flaga new gradient recipe. - Change the open speed with
--cs-dur(default.22s) which drives both fade and slide. - Swap the corner rounding via
--cs-radiusfor a sharper or pill-shaped panel.
Gotchas — read before shipping
- Flags made from gradients are decorative approximations — add real
aria-labelcountry names for accessibility, which this demo does. - If you nest the panel inside an
overflow: hiddenancestor it will clip; the panel isposition: absoluterelative to the widget for that reason. - Long country lists need
max-heightandoverflow-y: autoor the panel runs off small viewports.
Browser support
| Chrome | Safari | Firefox | Edge |
|---|---|---|---|
| 90+ | 14+ | 90+ | 90+ |
Gradient flags and transitions work everywhere; no experimental select APIs used.