Saya tidak puas dengan solusi khusus HTML / CSS, jadi saya memutuskan untuk membuat custom selectmenggunakan JavaScript.
Ini adalah sesuatu yang saya tulis dalam 30 menit terakhir, sehingga dapat lebih ditingkatkan.
Yang harus Anda lakukan adalah membuat daftar sederhana dengan beberapa atribut data. Kode secara otomatis mengubah daftar menjadi dropdown yang dapat dipilih. Itu juga menambahkan tersembunyi inputuntuk menyimpan nilai yang dipilih, sehingga bisa digunakan dalam formulir.
Memasukkan:
<ul class="select" data-placeholder="Role" data-name="role">
<li data-value="admin">Administrator</li>
<li data-value="mod">Moderator</li>
<li data-value="user">User</li>
</ul>
Keluaran:
<div class="ul-select-container">
<input type="hidden" name="role" class="hidden">
<div class="selected placeholder">
<span class="text">Role</span>
<span class="icon">▼</span>
</div>
<ul class="select" data-placeholder="Role" data-name="role">
<li class="placeholder">Role</li>
<li data-value="admin">Administrator</li>
<li data-value="mod">Moderator</li>
<li data-value="user">User</li>
</ul>
</div>
Teks item yang seharusnya menjadi pengganti adalah abu-abu. Pengganti dapat dipilih, jika pengguna ingin mengembalikan pilihannya. Juga menggunakan CSS, semua kelemahan selectdapat diatasi (misalnya, ketidakmampuan penataan opsi).
// Helper function to create elements faster/easier
// https://github.com/akinuri/js-lib/blob/master/element.js
var elem = function(tagName, attributes, children, isHTML) {
let parent;
if (typeof tagName == "string") {
parent = document.createElement(tagName);
} else if (tagName instanceof HTMLElement) {
parent = tagName;
}
if (attributes) {
for (let attribute in attributes) {
parent.setAttribute(attribute, attributes[attribute]);
}
}
var isHTML = isHTML || null;
if (children || children == 0) {
elem.append(parent, children, isHTML);
}
return parent;
};
elem.append = function(parent, children, isHTML) {
if (parent instanceof HTMLTextAreaElement || parent instanceof HTMLInputElement) {
if (children instanceof Text || typeof children == "string" || typeof children == "number") {
parent.value = children;
} else if (children instanceof Array) {
children.forEach(function(child) {
elem.append(parent, child);
});
} else if (typeof children == "function") {
elem.append(parent, children());
}
} else {
if (children instanceof HTMLElement || children instanceof Text) {
parent.appendChild(children);
} else if (typeof children == "string" || typeof children == "number") {
if (isHTML) {
parent.innerHTML += children;
} else {
parent.appendChild(document.createTextNode(children));
}
} else if (children instanceof Array) {
children.forEach(function(child) {
elem.append(parent, child);
});
} else if (typeof children == "function") {
elem.append(parent, children());
}
}
};
// Initialize all selects on the page
$("ul.select").each(function() {
var parent = this.parentElement;
var refElem = this.nextElementSibling;
var container = elem("div", {"class": "ul-select-container"});
var hidden = elem("input", {"type": "hidden", "name": this.dataset.name, "class": "hidden"});
var selected = elem("div", {"class": "selected placeholder"}, [
elem("span", {"class": "text"}, this.dataset.placeholder),
elem("span", {"class": "icon"}, "▼", true),
]);
var placeholder = elem("li", {"class": "placeholder"}, this.dataset.placeholder);
this.insertBefore(placeholder, this.children[0]);
container.appendChild(hidden);
container.appendChild(selected);
container.appendChild(this);
parent.insertBefore(container, refElem);
});
// Update necessary elements with the selected option
$(".ul-select-container ul li").on("click", function() {
var text = this.innerText;
var value = this.dataset.value || "";
var selected = this.parentElement.previousElementSibling;
var hidden = selected.previousElementSibling;
hidden.value = selected.dataset.value = value;
selected.children[0].innerText = text;
if (this.classList.contains("placeholder")) {
selected.classList.add("placeholder");
} else {
selected.classList.remove("placeholder");
}
selected.parentElement.classList.remove("visible");
});
// Open select dropdown
$(".ul-select-container .selected").on("click", function() {
if (this.parentElement.classList.contains("visible")) {
this.parentElement.classList.remove("visible");
} else {
this.parentElement.classList.add("visible");
}
});
// Close select when focus is lost
$(document).on("click", function(e) {
var container = $(e.target).closest(".ul-select-container");
if (container.length == 0) {
$(".ul-select-container.visible").removeClass("visible");
}
});
.ul-select-container {
width: 200px;
display: table;
position: relative;
margin: 1em 0;
}
.ul-select-container.visible ul {
display: block;
padding: 0;
list-style: none;
margin: 0;
}
.ul-select-container ul {
background-color: white;
border: 1px solid hsla(0, 0%, 60%);
border-top: none;
-webkit-user-select: none;
display: none;
position: absolute;
width: 100%;
z-index: 999;
}
.ul-select-container ul li {
padding: 2px 5px;
}
.ul-select-container ul li.placeholder {
opacity: 0.5;
}
.ul-select-container ul li:hover {
background-color: dodgerblue;
color: white;
}
.ul-select-container ul li.placeholder:hover {
background-color: rgba(0, 0, 0, .1);
color: initial;
}
.ul-select-container .selected {
background-color: white;
padding: 3px 10px 4px;
padding: 2px 5px;
border: 1px solid hsla(0, 0%, 60%);
-webkit-user-select: none;
}
.ul-select-container .selected {
display: flex;
justify-content: space-between;
}
.ul-select-container .selected.placeholder .text {
color: rgba(0, 0, 0, .5);
}
.ul-select-container .selected .icon {
font-size: .7em;
display: flex;
align-items: center;
opacity: 0.8;
}
.ul-select-container:hover .selected {
border: 1px solid hsla(0, 0%, 30%);
}
.ul-select-container:hover .selected .icon {
opacity: 1;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul class="select" data-placeholder="Role" data-name="role">
<li data-value="admin">Administrator</li>
<li data-value="mod">Moderator</li>
<li data-value="user">User</li>
</ul>
<ul class="select" data-placeholder="Sex" data-name="sex">
<li data-value="male">Male</li>
<li data-value="female">Female</li>
</ul>
Pembaruan : Saya telah memperbaiki ini (pilihan menggunakan tombol naik / turun / masuk), merapikan output sedikit, dan mengubahnya menjadi objek. Keluaran saat ini:
<div class="li-select-container">
<input type="text" readonly="" placeholder="Role" title="Role">
<span class="arrow">▼</span>
<ul class="select">
<li class="placeholder">Role</li>
<li data-value="admin">Administrator</li>
<li data-value="mod">Moderator</li>
<li data-value="user">User</li>
</ul>
</div>
Inisialisasi:
new Liselect(document.getElementsByTagName("ul")[0]);
Untuk pemeriksaan lebih lanjut: JSFiddle , GitHub (diganti namanya).
Pembaruan: Saya telah menulis ulang ini lagi. Alih-alih menggunakan daftar, kita bisa menggunakan pilih. Dengan cara ini akan berfungsi bahkan tanpa JavaScript (kalau-kalau dinonaktifkan).
Memasukkan:
<select name="role" data-placeholder="Role" required title="Role">
<option value="admin">Administrator</option>
<option value="mod">Moderator</option>
<option>User</option>
</select>
new Advancelect(document.getElementsByTagName("select")[0]);
Keluaran:
<div class="advanced-select">
<input type="text" readonly="" placeholder="Role" title="Role" required="" name="role">
<span class="arrow">▼</span>
<ul>
<li class="placeholder">Role</li>
<li data-value="admin">Administrator</li>
<li data-value="mod">Moderator</li>
<li>User</li>
</ul>
</div>
JSFiddle , GitHub .
bersudut