要實現兩個主要功能：
取消選中類別時將其刪除
我建議您使用 Set as ，以便您可以分別通過 和 輕松檢查、添加和刪除條目。filters.categorieshasadddelete
//onchange event
if (checkbox.checked) {
filters.categories.add(event.target.value);
} else {
filters.categories.delete(event.target.value);
}
filterStores(stores, filters);
也根據類別進行過濾stores
將回調修改為帳戶：.filter
store.name.toLowerCase().includes(filters.searchText.toLowerCase()) &&
filters.categories.has(store.category.name.toLowerCase())
此外，要在未選擇任何類別時顯示全部，請執行以下操作：
store.name.toLowerCase().includes(filters.searchText.toLowerCase()) &&
(
filters.categories.has(store.category.name.toLowerCase()) ||
filters.categories.size === 0
)
一起：
/*----------------------------
data
----------------------------*/
const stores = [{
id: 0,
name: 'The Last Of Us',
studio: 'Naughtydog',
thumbnail: '',
category: {
id: 0,
name: 'Playstation'
},
price: 50.00
}, {
id: 1,
name: 'Animal Crossing',
studio: 'Nintendo',
thumbnail: '',
category: {
id: 1,
name: 'Nintendo'
},
price: 60.00
}, {
id: 2,
name: 'Gears 5',
studio: 'The Coalition',
thumbnail: '',
category: {
id: 2,
name: 'Xbox'
},
price: 10.00
}, {
id: 3,
name: 'DOOM Eternal',
studio: 'id Software',
thumbnail: '',
category: {
id: 3,
name: 'Playstation'
},
price: 50.00
}, {
id: 4,
name: 'The Legend of Zelda: Link\'s Awakening',
studio: 'Grezzo',
thumbnail: '',
category: {
id: 4,
name: 'Nintendo'
},
price: 35.00
}, {
id: 5,
name: 'Resident Evil 3',
studio: 'Capcom',
thumbnail: '',
category: {
id: 5,
name: 'Playstation'
},
price: 40.00
}];
let filters = {
searchText: '',
categories: new Set
}
/*----------------------------
functions
----------------------------*/
let filterStores = function (stores, filters) {
let filteredStores = stores.filter(store => (
store.name.toLowerCase().includes(filters.searchText.toLowerCase()) &&
(
filters.categories.has(store.category.name.toLowerCase()) ||
filters.categories.size === 0 //No selected categories, show all
)
));
let grid = document.querySelector('.grid');
grid.innerHTML = '';
filteredStores.forEach(function (store) {
let li = document.createElement('li');
li.textContent = store.name;
grid.appendChild(li);
});
}
/*----------------------------
events
----------------------------*/
document.addEventListener('DOMContentLoaded', function () {
filterStores(stores, filters);
document.querySelector('.store-search').addEventListener('input', function (event) {
filters.searchText = event.target.value;
filterStores(stores, filters);
});
document.querySelectorAll('.category-cb').forEach(function (checkbox) {
checkbox.addEventListener('change', function (event) {
if (checkbox.checked) {
filters.categories.add(event.target.value);
} else {
filters.categories.delete(event.target.value);
}
filterStores(stores, filters);
});
});
});
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<aside>
<ul>
<li>
<label>
<input type="checkbox" value="playstation" class="category-cb">
<span>Playstation</span>
</label>
</li>
<li>
<label>
<input type="checkbox" value="xbox" class="category-cb">
<span>Xbox</span>
</label>
</li>
<li>
<label>
<input type="checkbox" value="nintendo" class="category-cb">
<span>Nintendo</span>
</label>
</li>
</ul>
</aside>
<main>
<input type="text" class="store-search" placeholder="Search">
<ul class="grid"></ul>
</main>
<script src="app.js"></script>
</body>
</html>
您還可以使用數組：
/*----------------------------
data
----------------------------*/
const stores = [{
id: 0,
name: 'The Last Of Us',
studio: 'Naughtydog',
thumbnail: '',
category: {
id: 0,
name: 'Playstation'
},
price: 50.00
}, {
id: 1,
name: 'Animal Crossing',
studio: 'Nintendo',
thumbnail: '',
category: {
id: 1,
name: 'Nintendo'
},
price: 60.00
}, {
id: 2,
name: 'Gears 5',
studio: 'The Coalition',
thumbnail: '',
category: {
id: 2,
name: 'Xbox'
},
price: 10.00
}, {
id: 3,
name: 'DOOM Eternal',
studio: 'id Software',
thumbnail: '',
category: {
id: 3,
name: 'Playstation'
},
price: 50.00
}, {
id: 4,
name: 'The Legend of Zelda: Link\'s Awakening',
studio: 'Grezzo',
thumbnail: '',
category: {
id: 4,
name: 'Nintendo'
},
price: 35.00
}, {
id: 5,
name: 'Resident Evil 3',
studio: 'Capcom',
thumbnail: '',
category: {
id: 5,
name: 'Playstation'
},
price: 40.00
}];
let filters = {
searchText: '',
categories: []
}
/*----------------------------
functions
----------------------------*/
let filterStores = function (stores, filters) {
let filteredStores = stores.filter(store => (
store.name.toLowerCase().includes(filters.searchText.toLowerCase()) &&
(
filters.categories.includes(store.category.name.toLowerCase()) ||
filters.categories.length === 0 //No selected categories, show all
)
));
let grid = document.querySelector('.grid');
grid.innerHTML = '';
filteredStores.forEach(function (store) {
let li = document.createElement('li');
li.textContent = store.name;
grid.appendChild(li);
});
}
/*----------------------------
events
----------------------------*/
document.addEventListener('DOMContentLoaded', function () {
filterStores(stores, filters);
document.querySelector('.store-search').addEventListener('input', function (event) {
filters.searchText = event.target.value;
filterStores(stores, filters);
});
document.querySelectorAll('.category-cb').forEach(function (checkbox) {
checkbox.addEventListener('change', function (event) {
if (checkbox.checked) {
filters.categories.push(event.target.value);
} else {
filters.categories.splice(filters.categories.indexOf(event.target.value), 1);
}
filterStores(stores, filters);
});
});
});
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<aside>
<ul>
<li>
<label>
<input type="checkbox" value="playstation" class="category-cb">
<span>Playstation</span>
</label>
</li>
<li>
<label>
<input type="checkbox" value="xbox" class="category-cb">
<span>Xbox</span>
</label>
</li>
<li>
<label>
<input type="checkbox" value="nintendo" class="category-cb">
<span>Nintendo</span>
</label>
</li>
</ul>
</aside>
<main>
<input type="text" class="store-search" placeholder="Search">
<ul class="grid"></ul>
</main>
<script src="app.js"></script>
</body>
</html>
