使用JS进行多类别过滤?
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我目前正在做一个网站,可以直观地显示我看过的所有电影。一个电影列表,如果你愿意。我想出了如何使用JS来过滤基于按钮按下的列表,然而,它只过滤1按钮的时间。我希望列表能根据多个按钮进行过滤。
比如说 "全部 竣工 电影 评分 3和行动 类型*".
或:"所有 竣工 和 观看 电影"
我从来没有学过JS(虽然我打算最终要学),所以我对如何做这件事有点迷茫。
这是我现在的代码。
filterSelection("all")
function filterSelection(c) {
var eles = document.getElementsByClassName("flex-card");
for(var i=0; i < eles.length; i++) {
if (c === "all" || eles[i].classList.contains(c)) {
eles[i].classList.remove("displayNone");
}
else {
eles[i].classList.add("displayNone");
}
}
}
.card:hover .overlay {
display: none;
}
.btn:hover {
background-color: hsl(14,80%,70%);
}
.displayNone {
display: none;
}
.yellow {
color: hsl(14,80%,70%);
}
.heading {
color: white;
}
.button-container {
margin: 0px 0px 12px;
text-align: center;
padding-bottom: 12px;
}
.btn {
color: hsl(14,80%,30%);
background-color: hsl(43,83%,55%);
border: 1px solid rgba(0, 0, 0, 0.94);
border-radius: 10px;
text-align: center;
font-weight: 600;
font-size: 10px;
line-height: 20px;
width: 80px;
margin: 5px 0px 5px 5px;
padding: 0px 12px;
}
.flex-container {
display: flex;
flex-direction: row;
flex-wrap: wrap;
justify-content: center;
padding-left: 15%;
padding-right: 15%;
}
/* I am using a 7:10 aspect ratio (width:height) */
.flex-card {
position: relative;
height: 265px;
width: 185px;
perspective: 1000px;
margin-right: 1rem;
margin-bottom: 1rem;
}
.a {
}
.card {
position: relative;
width: 100%;
height: 100%;
transition: transform 0.6s 0s;
transform-style: preserve-3d;
box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2);
}
.image {
object-fit: cover;
width: 100%;
height: 100%;
}
.overlay {
position: absolute;
bottom: 0;
background-color: rgba(0, 0, 0, 0.7);
width: 100%;
transition: .1s ease;
}
.title {
text-align: center;
color: white;
font-size: 14px;
font-weight: 600;
margin: 8px;
}
.subtitle {
margin: 8px;
font-size: 12px;
font-weight: 600;
text-align: center;
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="description" content="">
<meta name="author" content="">
<title>New page</title>
<link href="css/new.css" rel="stylesheet" type="text/css">
</head>
<body style="background-color: rgb(19,23,29);">
<div>
<h1 style="text-align: center;" class="heading">Movie List</h1>
<div class="button-container" data-pg-name="Buttons">
<button class="btn" onclick="filterSelection('all')">All</button>
<button class="btn" onclick="filterSelection('watching')">Watching</button>
<button class="btn" onclick="filterSelection('planned')">Planned</button>
<button class="btn" onclick="filterSelection('completed')">Completed</button>
<button class="btn" onclick="filterSelection('dropped')">Dropped</button>
<br>
<button class="btn" onclick="filterSelection('five')">5</button>
<button class="btn" onclick="filterSelection('four')">4</button>
<button class="btn" onclick="filterSelection('three')">3</button>
<button class="btn" onclick="filterSelection('two')">2</button>
<button class="btn" onclick="filterSelection('one')">1</button>
<br>
<button class="btn" onclick="filterSelection('action')">Action</button>
<button class="btn" onclick="filterSelection('horror')">Horror</button>
<button class="btn" onclick="filterSelection('romance')">Romance</button>
<button class="btn" onclick="filterSelection('etc')">etc.</button>
<button class="btn" onclick="filterSelection('etc')">etc.</button>
</div>
</div>
<div class="flex-container">
<div class="watching five flex-card">
<a href="#">
<div class="card">
<img src="https://via.placeholder.com/300" class="image">
<div class="overlay">
<p class="title">Title</p>
<p class="subtitle yellow">Studio</p>
</div>
</div>
</a>
</div>
<div class="planned three flex-card">
<a href="#">
<div class="card">
<img src="https://via.placeholder.com/300" class="image">
<div class="overlay">
<p class="title">Title</p>
<p class="subtitle yellow">Studio</p>
</div>
</div>
</a>
</div>
<div class="completed two flex-card">
<a href="#">
<div class="card">
<img src="https://via.placeholder.com/300" class="image">
<div class="overlay">
<p class="title">Title</p>
<p class="subtitle yellow">Studio</p>
</div>
</div>
</a>
</div>
</div>
</body>
</html>
也在 jsfidle
答案
可以将所有点击过的选择器存储在一个数组中,并根据整个数组的状态来渲染卡片,而不仅仅是最后点击的按钮。快速和肮脏的例子可以是这样的。
const allCards = document.querySelectorAll(".flex-card");
var displayAll = true // special value for displaying all - default true
var activeCards = [] // array holding all selected values
function toggleSelector(c) {
if (c === 'all') {
displayAll = !displayAll
activeCards = [] // optional
return
}
displayAll = false
if (activeCards.includes(c)) {
activeCards = activeCards.filter(card => card !== c)
} else {
activeCards.push(c)
}
}
// quick dirty way to render cards
function renderCards() {
if (displayAll) {
allCards.forEach(card => showCard(card))
return
}
allCards.forEach(card => hideCard(card))
for (let card of allCards) {
for (let cardClass of card.classList) {
if (activeCards.includes(cardClass)) {
showCard(card)
break;
}
}
}
}
// on each click toggle clicked selector and re-render cards
function filterSelection(c) {
toggleSelector(c)
renderCards()
}
function showCard(card) {
card.classList.remove("displayNone");
}
function hideCard(card) {
card.classList.add("displayNone");
}
renderCards()
.card:hover .overlay {
display: none;
}
.btn:hover {
background-color: hsl(14,80%,70%);
}
.displayNone {
display: none;
}
.yellow {
color: hsl(14,80%,70%);
}
.heading {
color: white;
}
.button-container {
margin: 0px 0px 12px;
text-align: center;
padding-bottom: 12px;
}
.btn {
color: hsl(14,80%,30%);
background-color: hsl(43,83%,55%);
border: 1px solid rgba(0, 0, 0, 0.94);
border-radius: 10px;
text-align: center;
font-weight: 600;
font-size: 10px;
line-height: 20px;
width: 80px;
margin: 5px 0px 5px 5px;
padding: 0px 12px;
}
.flex-container {
display: flex;
flex-direction: row;
flex-wrap: wrap;
justify-content: center;
padding-left: 15%;
padding-right: 15%;
}
/* I am using a 7:10 aspect ratio (width:height) */
.flex-card {
position: relative;
height: 265px;
width: 185px;
perspective: 1000px;
margin-right: 1rem;
margin-bottom: 1rem;
}
.a {
}
.card {
position: relative;
width: 100%;
height: 100%;
transition: transform 0.6s 0s;
transform-style: preserve-3d;
box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2);
}
.image {
object-fit: cover;
width: 100%;
height: 100%;
}
.overlay {
position: absolute;
bottom: 0;
background-color: rgba(0, 0, 0, 0.7);
width: 100%;
transition: .1s ease;
}
.title {
text-align: center;
color: white;
font-size: 14px;
font-weight: 600;
margin: 8px;
}
.subtitle {
margin: 8px;
font-size: 12px;
font-weight: 600;
text-align: center;
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="description" content="">
<meta name="author" content="">
<title>New page</title>
<link href="css/new.css" rel="stylesheet" type="text/css">
</head>
<body style="background-color: rgb(19,23,29);">
<div>
<h1 style="text-align: center;" class="heading">Movie List</h1>
<div class="button-container" data-pg-name="Buttons">
<button class="btn" onclick="filterSelection('all')">All</button>
<button class="btn" onclick="filterSelection('watching')">Watching</button>
<button class="btn" onclick="filterSelection('planned')">Planned</button>
<button class="btn" onclick="filterSelection('completed')">Completed</button>
<button class="btn" onclick="filterSelection('dropped')">Dropped</button>
<br>
<button class="btn" onclick="filterSelection('five')">5</button>
<button class="btn" onclick="filterSelection('four')">4</button>
<button class="btn" onclick="filterSelection('three')">3</button>
<button class="btn" onclick="filterSelection('two')">2</button>
<button class="btn" onclick="filterSelection('one')">1</button>
<br>
<button class="btn" onclick="filterSelection('action')">Action</button>
<button class="btn" onclick="filterSelection('horror')">Horror</button>
<button class="btn" onclick="filterSelection('romance')">Romance</button>
<button class="btn" onclick="filterSelection('etc')">etc.</button>
<button class="btn" onclick="filterSelection('etc')">etc.</button>
</div>
</div>
<div class="flex-container">
<div class="watching five flex-card displayNone">
<a href="#">
<div class="card">
<img src="https://via.placeholder.com/300" class="image">
<div class="overlay">
<p class="title">Title</p>
<p class="subtitle yellow">Studio</p>
</div>
</div>
</a>
</div>
<div class="planned three flex-card displayNone action">
<a href="#">
<div class="card">
<img src="https://via.placeholder.com/300" class="image">
<div class="overlay">
<p class="title">Title</p>
<p class="subtitle yellow">Studio</p>
</div>
</div>
</a>
</div>
<div class="completed two flex-card displayNone action">
<a href="#">
<div class="card">
<img src="https://via.placeholder.com/300" class="image">
<div class="overlay">
<p class="title">Title</p>
<p class="subtitle yellow">Studio</p>
</div>
</div>
</a>
</div>
</div>
</body>
</html>
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