当前,在我的应用程序中,用户可以通过输入游戏名称来搜索游戏标题。当他们开始键入结果时,将使用filter方法更新结果。我现在正尝试使用多个复选框来做同样的事情。因此,例如,当用户检查playstation和或xbox时,结果仅显示这些类别的游戏。当他们取消选中时,结果将使用更新的值刷新。
目前,我已经成功创建了所有复选框的change事件,并将它们的值推送到filter.categories数组。我遇到的问题是我不知道如何将该数组连接到现有的过滤器方法。我需要以某种方式循环通过数组,并将当前值与我的store对象中的category.name进行比较,以查看它们是否匹配。是否可以在filter方法内部进行?有什么想法我要去哪里吗?
谢谢。
html:
<!DOCTYPE html>
<html lang="en">
<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>
<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>
</li>
</ul>
</aside>
<main>
<input type="text" class="store-search" placeholder="Search">
<ul class="grid"></ul>
</main>
<script src="app.js"></script>
</body>
</html>
js:
/*----------------------------
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(function (store) {
let storeName = store.name.toLowerCase().includes(filters.searchText.toLowerCase());
return storeName;
});
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);
filterStores(stores, filters);
console.log(filters.categories);
}
});
});
});
答案 0 :(得分:1)
要实现的主要功能有两个:
取消选中类别时将其删除
我建议您使用Set as filters.categories
,以便可以分别通过has
,add
和delete
轻松地检查,添加和删除条目。
//onchange event
if (checkbox.checked) {
filters.categories.add(event.target.value);
} else {
filters.categories.delete(event.target.value);
}
filterStores(stores, filters);
也根据类别过滤stores
还要为此修改您的.filter
回调:
store.name.toLowerCase().includes(filters.searchText.toLowerCase()) &&
filters.categories.has(store.category.name.toLowerCase())
此外,要在未选择任何类别时显示所有内容,请执行以下操作:
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 lang="en">
<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>
您还可以使用数组:
/*----------------------------
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 lang="en">
<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>