How TO — Custom Select Box
Learn how to create custom select boxes with CSS and JavaScript.
Custom Select Box
Create a Custom Select Menu
Step 1) Add HTML:
Example
Step 2) Add CSS:
Example
/* The container must be positioned relative: */
.custom-select position: relative;
font-family: Arial;
>
.custom-select select display: none; /*hide original SELECT element: */
>
.select-selected background-color: DodgerBlue;
>
/* Style the arrow inside the select element: */
.select-selected:after position: absolute;
content: «»;
top: 14px;
right: 10px;
width: 0;
height: 0;
border: 6px solid transparent;
border-color: #fff transparent transparent transparent;
>
/* Point the arrow upwards when the select box is open (active): */
.select-selected.select-arrow-active:after border-color: transparent transparent #fff transparent;
top: 7px;
>
/* style the items (options), including the selected item: */
.select-items div,.select-selected color: #ffffff;
padding: 8px 16px;
border: 1px solid transparent;
border-color: transparent transparent rgba(0, 0, 0, 0.1) transparent;
cursor: pointer;
>
/* Style items (options): */
.select-items position: absolute;
background-color: DodgerBlue;
top: 100%;
left: 0;
right: 0;
z-index: 99;
>
/* Hide the items when the select box is closed: */
.select-hide display: none;
>
.select-items div:hover, .same-as-selected background-color: rgba(0, 0, 0, 0.1);
>
Step 3) Add JavaScript:
Example
var x, i, j, l, ll, selElmnt, a, b, c;
/* Look for any elements with the class «custom-select»: */
x = document.getElementsByClassName(«custom-select»);
l = x.length;
for (i = 0; i < l; i++) selElmnt = x[i].getElementsByTagName("select")[0];
ll = selElmnt.length;
/* For each element, create a new DIV that will act as the selected item: */
a = document.createElement(«DIV»);
a.setAttribute(«class», «select-selected»);
a.innerHTML = selElmnt.options[selElmnt.selectedIndex].innerHTML;
x[i].appendChild(a);
/* For each element, create a new DIV that will contain the option list: */
b = document.createElement(«DIV»);
b.setAttribute(«class», «select-items select-hide»);
for (j = 1; j < ll; j++) /* For each option in the original select element,
create a new DIV that will act as an option item: */
c = document.createElement(«DIV»);
c.innerHTML = selElmnt.options[j].innerHTML;
c.addEventListener(«click», function(e) /* When an item is clicked, update the original select box,
and the selected item: */
var y, i, k, s, h, sl, yl;
s = this.parentNode.parentNode.getElementsByTagName(«select»)[0];
sl = s.length;
h = this.parentNode.previousSibling;
for (i = 0; i < sl; i++) if (s.options[i].innerHTML == this.innerHTML) s.selectedIndex = i;
h.innerHTML = this.innerHTML;
y = this.parentNode.getElementsByClassName(«same-as-selected»);
yl = y.length;
for (k = 0; k < yl; k++) y[k].removeAttribute("class");
>
this.setAttribute(«class», «same-as-selected»);
break;
>
>
h.click();
>);
b.appendChild(c);
>
x[i].appendChild(b);
a.addEventListener(«click», function(e) /* When the select box is clicked, close any other select boxes,
and open/close the current select box: */
e.stopPropagation();
closeAllSelect(this);
this.nextSibling.classList.toggle(«select-hide»);
this.classList.toggle(«select-arrow-active»);
>);
>
function closeAllSelect(elmnt) /* A function that will close all select boxes in the document,
except the current select box: */
var x, y, i, xl, yl, arrNo = [];
x = document.getElementsByClassName(«select-items»);
y = document.getElementsByClassName(«select-selected»);
xl = x.length;
yl = y.length;
for (i = 0; i < yl; i++) if (elmnt == y[i]) arrNo.push(i)
> else y[i].classList.remove(«select-arrow-active»);
>
>
for (i = 0; i < xl; i++) if (arrNo.indexOf(i)) x[i].classList.add("select-hide");
>
>
>
/* If the user clicks anywhere outside the select box,
then close all select boxes: */
document.addEventListener(«click», closeAllSelect);