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filter-params.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Updating Filter Queries with Vanilla JavaScript</title>
<style>
* {
box-sizing: border-box;
}
body {
font: normal 16px/26px system-ui, Roboto, Arial, sans-serif;
background: #fefefe;
color: #2a3744;
margin: 0;
padding: 0;
text-rendering: optimizeLegibility;
-webkit-font-smoothing: antialiased;
-webkit-text-size-adjust: none;
overflow-x: hidden;
}
header {
background: #282828;
position: relative;
font-family: system-ui, Roboto, sans-serif;
min-height: 75px;
display: flex;
align-items: center;
}
a {
color: #0085b6;
text-decoration: none;
border: none;
}
.container {
max-width: 1440px;
margin: 0 auto;
padding: 0 24px;
width: 100%;
}
main.container {
margin-top: 32px;
}
.profile__header {
margin-bottom: 20px;
}
.profile__title {
margin: 16px 0;
font: 700 43px/1.2em system-ui, Roboto, Arial, sans-serif;
}
.profile__social-links {
list-style: none;
padding-left: 0;
margin: 10px 0 0;
width: 100%;
}
.profile__social-link__item {
display: inline-block;
margin-left: 10px;
}
.profile__social-link__item:first-child {
margin-left: 0;
}
.container__title {
font-weight: 700;
font-size: 14px;
color: #8fa6b3;
}
#posts-container {
display: flex;
flex-wrap: wrap;
}
.post {
display: flex;
flex-direction: column;
position: relative;
width: 300px;
margin-right: 30px;
margin-bottom: 40px;
border: 1px solid #e1e8ed;
border-radius: 4px;
margin-top: 12px;
min-height: 300px;
height: auto;
}
.post-title {
font: 700 18px/1.4em system-ui, Roboto, Arial, sans-serif;
color: #4a4a4a;
margin-top: 0;
display: -webkit-box;
-webkit-line-clamp: 3;
-webkit-box-orient: vertical;
overflow: hidden;
text-overflow: ellipsis;
}
.post-content {
display: flex;
flex-direction: column;
flex-grow: 1;
padding: 16px;
}
.post-preview {
overflow: hidden;
width: 100%;
text-align: center;
display: block;
margin: 0 auto;
border-bottom: 1px solid #e1e8ed;
line-height: 0;
height: 200px;
}
.post-tag {
display: inline-block;
margin-right: 10px;
margin-bottom: 10px;
padding: 0 8px;
color: #717171;
border: 1px solid #9b9b9b;
border-radius: 25px;
white-space: nowrap;
}
.post-footer {
text-align: right;
margin-top: auto;
}
.post-level {
font: 700 12px/1 system-ui, Roboto, Arial, sans-serif;
text-transform: uppercase;
display: inline-block;
-webkit-font-smoothing: subpixel-antialiased;
color: #0085b6;
}
.filter-container {
display: flex;
flex-wrap: wrap;
justify-content: flex-start;
gap: 10px;
padding: 16px 0 32px;
border-bottom: 1px solid #e4e4e4;
margin-bottom: 16px;
}
.filter-button {
transition: background-color 200ms, color 200ms;
background-color: transparent;
font: inherit;
cursor: pointer;
display: inline-block;
padding: 0 8px;
color: #717171;
border: 1px solid #9b9b9b;
border-radius: 25px;
font-size: 14px;
white-space: nowrap;
}
.filter-button:hover {
background-color: #f3f3f3;
color: #3a3a3a;
}
.filter-button[data-state=active] {
background-color: #0085b6;
border-color: #0085b6;
color: #fff;
}
</style>
</head>
<body>
<header>
<div class="container header-content">
<img alt="envato-tuts+" class="logo"
src="https://static.tutsplus.com/packs/media/images/tuts_logo-ae9e557ae6c08db82f47e6047900e39b.svg">
</div>
</header>
<main class="container">
<div class="container__title">Categories</div>
<div id="post-categories" class="filter-container"></div>
<div class="container__title">Level</div>
<div id="post-levels" class="filter-container"></div>
<div class="container__title">
Tutorials (<span id="post-count"></span>)
</div>
<div id="posts-container"></div>
<p id="no-results"></p>
</main>
<script>
let postsData = "";
let currentFilters = {
categories: [],
level: []
};
const postsContainer = document.querySelector("#posts-container");
const categoriesContainer = document.querySelector("#post-categories");
const levelsContainer = document.querySelector("#post-levels");
const postCount = document.querySelector("#post-count");
const noResults = document.querySelector("#no-results");
fetch(
"https://gist.githubusercontent.com/jemimaabu/564beec0a30dbd7d63a90a153d2bc80b/raw/12741cce73c71c179381cc9e3b5f79988ea76a45/tutorial-levels"
).then(async (response) => {
postsData = await response.json();
postsData.map((post) => createPost(post));
postCount.innerText = postsData.length;
categoriesData = [
...new Set(
postsData
.map((post) => post.categories)
.reduce((acc, curVal) => acc.concat(curVal), [])
)
];
categoriesData.map((category) =>
createFilter("categories", category, categoriesContainer)
);
levelData = [...new Set(postsData.map((post) => post.level))];
levelData.map((level) => createFilter("level", level, levelsContainer));
getFilterParams()
});
const createPost = (postData) => {
const { title, link, image, categories, level } = postData;
const post = document.createElement("div");
post.className = "post";
post.innerHTML = `
<a class="post-preview" href="${link}" target="_blank">
<img class="post-image" src="${image}">
</a>
<div class="post-content">
<p class="post-title">${title}</p>
<div class="post-tags">
${categories
.map((category) => {
return '<span class="post-tag">' + category + "</span>";
})
.join("")}
</div>
<div class="post-footer">
<span class="post-level">${level}</span>
</div>
</div>
`;
postsContainer.append(post);
};
const createFilter = (key, param, container) => {
const filterButton = document.createElement("button");
filterButton.className = "filter-button";
filterButton.innerText = param;
filterButton.setAttribute("data-key", key);
filterButton.setAttribute("data-param", param);
filterButton.addEventListener("click", (e) =>
handleButtonClick(e, key, param, container)
);
const currentUrl = new URL(window.location)
const filterKey = currentUrl.searchParams.getAll(key)
if (filterKey.includes(param)) {
filterButton.setAttribute("data-state", "active");
} else {
filterButton.setAttribute("data-state", "inactive");
}
container.append(filterButton);
};
const handleButtonClick = (e, key, param, container) => {
const button = e.target;
const buttonState = button.getAttribute("data-state");
if (buttonState == "inactive") {
button.setAttribute("data-state", "active");
currentFilters[key].push(param);
updateFilterParams(key, param);
handleFilterPosts(currentFilters);
} else {
button.setAttribute("data-state", "inactive");
currentFilters[key] = currentFilters[key].filter((item) => item !== param);
removeFilterParams(key, param);
handleFilterPosts(currentFilters);
}
};
const updateFilterParams = (filter, value) => {
const currentUrl = new URL(window.location)
currentUrl.searchParams.append(filter, value)
window.history.replaceState({}, '', currentUrl)
}
const removeFilterParams = (filter, value) => {
const currentUrl = new URL(window.location)
currentUrl.searchParams.delete(filter, value)
window.history.replaceState({}, '', currentUrl)
}
const getFilterParams = () => {
const currentUrl = new URL(window.location)
if (currentUrl.searchParams.size <= 0) {
return
}
currentUrl.searchParams.forEach((value, key) => {
currentFilters[key].push(value)
});
handleFilterPosts(currentFilters);
}
const handleFilterPosts = (filters) => {
let filteredPosts = [...postsData];
let filterKeys = Object.keys(filters);
filterKeys.forEach((key) => {
let currentKey = filters[key]
if (currentKey.length <= 0) {
return;
}
filteredPosts = filteredPosts.filter((post) => {
let currentValue = post[key]
return Array.isArray(currentValue)
? currentValue.some((val) => currentKey.includes(val))
: currentKey.includes(currentValue);
});
});
postCount.innerText = filteredPosts.length;
if (filteredPosts.length == 0) {
noResults.innerText = "Sorry, we couldn't find any results.";
} else {
noResults.innerText = "";
}
postsContainer.innerHTML = "";
filteredPosts.map((post) => createPost(post));
};
</script>
</body>
</html>