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@@ -1,85 +1,96 @@
<!doctype html>
-<html lang="en" id="top">
+<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="icon" href="data:,">
<title>Pure CSS Bar Graphs with Graceful Mobile Fallbacks</title>
- <link href="https://bt.ht/atom.xml" type="application/atom+xml" rel="alternate" title="Atom feed for blog posts" />
- <style>*{box-sizing:border-box;}body{font-family:sans-serif;margin:0 auto;max-width:650px;padding:1rem;}img{max-width:100%;}pre{overflow:auto;}table{text-align:left;width:100%;}</style>
+ <link href="/atom.xml" type="application/atom+xml" rel="alternate" title="Atom feed for blog posts" />
+ <link href="/rss.xml" type="application/rss+xml" rel="alternate" title="RSS feed for blog posts" />
+<style>*{box-sizing:border-box;}body{font-family:sans-serif;line-height:1.33;margin:0 auto;max-width:650px;padding:1rem;}img{max-width:100%;}pre{border:1px solid;overflow:auto;padding:5px;}table{text-align:left;width:100%;}.footnotes{font-size:90%;}</style>
</head>
<nav>
- <a href="#menu">Menu &darr;</a>
+ <a href="#menu">Menu &darr;</a>
</nav>
<main>
-<h1>Pure CSS Bar Graphs with Graceful Mobile Fallbacks</h1>
+<h1 id="pure-css-bar-graphs-with-graceful-mobile-fallbacks">Pure CSS Bar Graphs with Graceful Mobile Fallbacks</h1>
+
<p>2020-12-08</p>
-<p>I recently published a new open source project, <a target="_blank" href="https://flexbox-bar-graphs.netlify.app/">Flexbox Bar Graphs</a>, and wanted to share a simple breakdown of how it was built. It isn't anything mind-blowing, but I like the idea of placing bar graphs in a web page with <em>zero</em> Javascript.</p>
+
+<p>I recently published a new open source project, Flexbox Bar Graphs, and wanted to share a simple breakdown of how it was built. It isn&#8217;t anything mind-blowing, but I like the idea of placing bar graphs in a web page with <em>zero</em> Javascript.</p>
+
<p>So in the end, this is what our bar graphs will look like on desktop:</p>
-<p><figure>
- <img src="/public/images/flexbox-bar-graph-1.webp" alt="Flexbox Bar Graph">
- <figcaption>The flexbox bar graph in desktop view (<a href="/public/images/flexbox-bar-graph-1.webp">direct link to image</a>)</figcaption>
-</figure></p>
+
<p>And this is how it will look on smaller devices:</p>
-<p><figure>
- <img src="/public/images/flexbox-bar-graph-2.webp" alt="Flexbox Bar Graph Table">
- <figcaption>The flexbox bar graph on mobile devices (<a href="/public/images/flexbox-bar-graph-2.webp">direct link to image</a>)</figcaption>
-</figure></p>
-<p>Let's get into the details!</p>
-<h2>The HTML</h2>
-<p>The main "secret" of this project is that our graphs are constructed out of HTML <em>tables</em>. Now before you freak out - this is perfectly fine and works in our favor quite well.</p>
+
+<p>Let&#8217;s get into the details!</p>
+
+<h2 id="the-html">The HTML</h2>
+
+<p>The main &#8220;secret&#8221; of this project is that our graphs are constructed out of HTML <em>tables</em>. Now before you freak out - this is perfectly fine and works in our favor quite well.</p>
+
<ol>
-<li>If the user has JS disabled --&gt; they will still see our graphs</li>
-<li>If the user has CSS disabled --&gt; they will see a standard data table set</li>
+<li>If the user has JS disabled &#8211;&#62; they will still see our graphs</li>
+<li>If the user has CSS disabled &#8211;&#62; they will see a standard data table set</li>
</ol>
+
<p>All bases are covered!</p>
-<pre><code>&lt;!-- Using a basic table with our custom data-id --&gt;
-&lt;table data-id=&quot;flexbox-bar-graph&quot;&gt;
- &lt;caption&gt;Web Performance Results&lt;/caption&gt;
- &lt;thead&gt;
- &lt;tr&gt;
- &lt;th&gt;Test Performed&lt;/th&gt;
- &lt;th&gt;Before&lt;/th&gt;
- &lt;th&gt;After&lt;/th&gt;
- &lt;th&gt;Difference&lt;/th&gt;
- &lt;/tr&gt;
- &lt;/thead&gt;
- &lt;tbody&gt;
- &lt;tr&gt;
- &lt;th&gt;Initial Load Time&lt;/th&gt;
- &lt;td&gt;
- &lt;!--
+
+<pre><code>&#60;!-- Using a basic table with our custom data-id --&#62;
+&#60;table data-id="flexbox-bar-graph"&#62;
+ &#60;caption&#62;Web Performance Results&#60;&#47;caption&#62;
+ &#60;thead&#62;
+ &#60;tr&#62;
+ &#60;th&#62;Test Performed&#60;&#47;th&#62;
+ &#60;th&#62;Before&#60;&#47;th&#62;
+ &#60;th&#62;After&#60;&#47;th&#62;
+ &#60;th&#62;Difference&#60;&#47;th&#62;
+ &#60;&#47;tr&#62;
+ &#60;&#47;thead&#62;
+ &#60;tbody&#62;
+ &#60;tr&#62;
+ &#60;th&#62;Initial Load Time&#60;&#47;th&#62;
+ &#60;td&#62;
+ &#60;!--
WTF are these CSS variables?
See the CSS section below
- --&gt;
- &lt;span style=&quot;--data-set:4.7/5;&quot;&gt;&lt;/span&gt;
- &lt;p&gt;4.7&lt;/p&gt;
- &lt;/td&gt;
- &lt;td&gt;
- &lt;span style=&quot;--data-set:2.7/5;&quot;&gt;&lt;/span&gt;
- &lt;p&gt;2.7&lt;/p&gt;
- &lt;/td&gt;
- &lt;td&gt;
- &lt;span style=&quot;--data-set:2/5;&quot;&gt;&lt;/span&gt;
- &lt;p&gt;2&lt;/p&gt;
- &lt;/td&gt;
- &lt;/tr&gt;
- &lt;/tbody&gt;
-&lt;/table&gt;
+ --&#62;
+ &#60;span style="--data-set:4.7&#47;5;"&#62;&#60;&#47;span&#62;
+ &#60;p&#62;4.7&#60;&#47;p&#62;
+ &#60;&#47;td&#62;
+ &#60;td&#62;
+ &#60;span style="--data-set:2.7&#47;5;"&#62;&#60;&#47;span&#62;
+ &#60;p&#62;2.7&#60;&#47;p&#62;
+ &#60;&#47;td&#62;
+ &#60;td&#62;
+ &#60;span style="--data-set:2&#47;5;"&#62;&#60;&#47;span&#62;
+ &#60;p&#62;2&#60;&#47;p&#62;
+ &#60;&#47;td&#62;
+ &#60;&#47;tr&#62;
+ &#60;&#47;tbody&#62;
+&#60;&#47;table&#62;
</code></pre>
+
<p>Nothing crazy is happening here - just your standard HTML table structure. The one main thing to notice is the <code>--data-set</code> CSS variable placed inline on each data point. This will be important for our CSS to configure the individual bar graphs properly.</p>
-<h2>The CSS</h2>
-<p>This might look overwhelming if I just dumped the whole CSS file in one big code block, so instead I'm going to break them down into two parts:</p>
+
+<h2 id="the-css">The CSS</h2>
+
+<p>This might look overwhelming if I just dumped the whole CSS file in one big code block, so instead I&#8217;m going to break them down into two parts:</p>
+
<ol>
<li>Baseline styling (mobile)</li>
<li>Desktop styling</li>
</ol>
-<h3>Baseline</h3>
+
+<h3 id="baseline">Baseline</h3>
+
<p>Here we target just our table elements with the <code>data-id</code> of <code>flexbox-bar-graph</code>. This allows us to avoid worrying about adding classes or IDs and also avoids conflicts with other non-graph styled tables in our projects.</p>
+
<p>The base <code>:root</code> element holds all of our bar graph colors. Change these as you see fit!</p>
-<pre><code>/* Bar Graph color variables */
+
+<pre><code>&#47;* Bar Graph color variables *&#47;
:root {
--bar-color-1: #357EC7;
--bar-color-2: #E42217;
@@ -87,207 +98,215 @@
--bar-color-4: #7D0541;
--bar-color-5: #FFD801;
}
-</code></pre>
-<pre><code>[data-id=&quot;flexbox-bar-graph&quot;] {
+
+[data-id="flexbox-bar-graph"] {
border-collapse: collapse;
margin: 4rem 0 6rem;
width: 100%;
}
-[data-id=&quot;flexbox-bar-graph&quot;] caption {
+[data-id="flexbox-bar-graph"] caption {
text-align: left;
}
-[data-id=&quot;flexbox-bar-graph&quot;] thead th {
+[data-id="flexbox-bar-graph"] thead th {
text-align: right;
}
-[data-id=&quot;flexbox-bar-graph&quot;] thead th:nth-child(1),
-[data-id=&quot;flexbox-bar-graph&quot;] tbody th {
+[data-id="flexbox-bar-graph"] thead th:nth-child(1),
+[data-id="flexbox-bar-graph"] tbody th {
text-align: left;
}
-[data-id=&quot;flexbox-bar-graph&quot;] tbody th {
+[data-id="flexbox-bar-graph"] tbody th {
font-weight: normal;
font-style: italic;
}
-[data-id=&quot;flexbox-bar-graph&quot;] tbody td {
+[data-id="flexbox-bar-graph"] tbody td {
text-align: right;
}
-[data-id=&quot;flexbox-bar-graph&quot;] tbody td p {
+[data-id="flexbox-bar-graph"] tbody td p {
margin: 0;
}
</code></pre>
-<h3>Desktop</h3>
-<p>Now we set your "visual" bar graphs to show at a set width (in this example it is 1000px and above). That way the "default" styling can target the mobile device screen sizes.</p>
+
+<h3 id="desktop">Desktop</h3>
+
+<p>Now we set your &#8220;visual&#8221; bar graphs to show at a set width (in this example it is 1000px and above). That way the &#8220;default&#8221; styling can target the mobile device screen sizes.</p>
+
<ul>
-<li>The <code>thead tr th:nth-child(x):before</code> elements create the square "legends" beside each individual data point heading</li>
-<li>The <code>tbody tr td:nth-of-type(x) span</code> elements are the bars themselves</li>
-</ul>
-<pre><code>@media(min-width: 1000px) {
- [data-id=&quot;flexbox-bar-graph&quot;] {
+<li><p>The <code>thead tr th:nth-child(x):before</code> elements create the square &#8220;legends&#8221; beside each individual data point heading</p></li>
+<li><p>The <code>tbody tr td:nth-of-type(x) span</code> elements are the bars themselves</p>
+
+<p>@media(min-width: 1000px) {
+ [data-id="flexbox-bar-graph&#8221;] {
background: transparent;
display: block;
min-height: 400px;
padding: 0;
position: relative;
width: 100%;
- }
+ }</p>
- [data-id=&quot;flexbox-bar-graph&quot;] caption {
- display: block;
- font-size: 2rem;
- text-align: center;
- width: 100%;
- }
+<pre><code>[data-id="flexbox-bar-graph"] caption {
+ display: block;
+ font-size: 2rem;
+ text-align: center;
+ width: 100%;
+}
- [data-id=&quot;flexbox-bar-graph&quot;] thead {
- display: block;
- margin: 2rem 0 3rem;
- width: 100%;
- }
- [data-id=&quot;flexbox-bar-graph&quot;] thead tr {
- border-bottom: 1px solid lightgrey;
- display: flex;
- justify-content: center;
- padding-bottom: 1rem;
- }
-
- [data-id=&quot;flexbox-bar-graph&quot;] thead tr th {
- display: inline-block;
- margin: 0;
- padding: 0;
- position: relative;
- text-align: right;
- }
- [data-id=&quot;flexbox-bar-graph&quot;] thead tr th:before {
- content:'';
- display: inline-block;
- height: 10px;
- margin: 0 0.5rem 0 2rem;
- position: relative;
- width: 10px;
- }
- [data-id=&quot;flexbox-bar-graph&quot;] thead tr th:nth-child(1),
- [data-id=&quot;flexbox-bar-graph&quot;] thead tr th:nth-child(1):before {
- display: none;
- }
- [data-id=&quot;flexbox-bar-graph&quot;] thead tr th:nth-child(2):before {
- background: var(--bar-color-1);
- }
- [data-id=&quot;flexbox-bar-graph&quot;] thead tr th:nth-child(3):before {
- background: var(--bar-color-2);
- }
- [data-id=&quot;flexbox-bar-graph&quot;] thead tr th:nth-child(4):before {
- background: var(--bar-color-3);
- }
- [data-id=&quot;flexbox-bar-graph&quot;] thead tr th:nth-child(5):before {
- background: var(--bar-color-4);
- }
- [data-id=&quot;flexbox-bar-graph&quot;] thead tr th:nth-child(6):before {
- background: var(--bar-color-5);
- }
-
- [data-id=&quot;flexbox-bar-graph&quot;] tbody {
- display: flex;
- justify-content: space-between;
- min-height: 300px;
- width: 100%;
- }
-
- [data-id=&quot;flexbox-bar-graph&quot;] tbody tr {
- display: flex;
- flex-direction: column-reverse;
- flex-wrap: wrap;
- justify-content: flex-end;
- padding: 0 50px;
- position: relative;
- width: 100%;
- }
- [data-id=&quot;flexbox-bar-graph&quot;] tbody tr th {
- font-size: 90%;
- position: absolute;
- text-align: center;
- top: 100%;
- width: calc(100% - 100px);
- }
- [data-id=&quot;flexbox-bar-graph&quot;] tbody tr td {
- align-items: center;
- display: flex;
- flex-direction: column;
- height: 95%;
- justify-content: flex-end;
- }
-
- [data-id=&quot;flexbox-bar-graph&quot;] tbody tr td span {
- display: block;
- height: calc(var(--data-set) * 100%);
- width: 20px;
- }
- [data-id=&quot;flexbox-bar-graph&quot;] tbody tr td:nth-of-type(1) span {
- background: var(--bar-color-1);
- }
- [data-id=&quot;flexbox-bar-graph&quot;] tbody tr td:nth-of-type(2) span {
- background: var(--bar-color-2);
- }
- [data-id=&quot;flexbox-bar-graph&quot;] tbody tr td:nth-of-type(3) span {
- background: var(--bar-color-3);
- }
- [data-id=&quot;flexbox-bar-graph&quot;] tbody tr td:nth-of-type(4) span {
- background: var(--bar-color-4);
- }
- [data-id=&quot;flexbox-bar-graph&quot;] tbody tr td:nth-of-type(5) span {
- background: var(--bar-color-5);
- }
-
- [data-id=&quot;flexbox-bar-graph&quot;] tbody tr td p {
- font-size: 90%;
- margin: 0;
- text-align: center;
- }
+[data-id="flexbox-bar-graph"] thead {
+ display: block;
+ margin: 2rem 0 3rem;
+ width: 100%;
+}
+[data-id="flexbox-bar-graph"] thead tr {
+ border-bottom: 1px solid lightgrey;
+ display: flex;
+ justify-content: center;
+ padding-bottom: 1rem;
+}
+
+[data-id="flexbox-bar-graph"] thead tr th {
+ display: inline-block;
+ margin: 0;
+ padding: 0;
+ position: relative;
+ text-align: right;
+}
+[data-id="flexbox-bar-graph"] thead tr th:before {
+ content:&#39;&#39;;
+ display: inline-block;
+ height: 10px;
+ margin: 0 0.5rem 0 2rem;
+ position: relative;
+ width: 10px;
+}
+[data-id="flexbox-bar-graph"] thead tr th:nth-child(1),
+[data-id="flexbox-bar-graph"] thead tr th:nth-child(1):before {
+ display: none;
+}
+[data-id="flexbox-bar-graph"] thead tr th:nth-child(2):before {
+ background: var(--bar-color-1);
+}
+[data-id="flexbox-bar-graph"] thead tr th:nth-child(3):before {
+ background: var(--bar-color-2);
+}
+[data-id="flexbox-bar-graph"] thead tr th:nth-child(4):before {
+ background: var(--bar-color-3);
+}
+[data-id="flexbox-bar-graph"] thead tr th:nth-child(5):before {
+ background: var(--bar-color-4);
+}
+[data-id="flexbox-bar-graph"] thead tr th:nth-child(6):before {
+ background: var(--bar-color-5);
+}
+
+[data-id="flexbox-bar-graph"] tbody {
+ display: flex;
+ justify-content: space-between;
+ min-height: 300px;
+ width: 100%;
+}
+
+[data-id="flexbox-bar-graph"] tbody tr {
+ display: flex;
+ flex-direction: column-reverse;
+ flex-wrap: wrap;
+ justify-content: flex-end;
+ padding: 0 50px;
+ position: relative;
+ width: 100%;
+}
+[data-id="flexbox-bar-graph"] tbody tr th {
+ font-size: 90%;
+ position: absolute;
+ text-align: center;
+ top: 100%;
+ width: calc(100% - 100px);
+}
+[data-id="flexbox-bar-graph"] tbody tr td {
+ align-items: center;
+ display: flex;
+ flex-direction: column;
+ height: 95%;
+ justify-content: flex-end;
+}
+
+[data-id="flexbox-bar-graph"] tbody tr td span {
+ display: block;
+ height: calc(var(--data-set) * 100%);
+ width: 20px;
+}
+[data-id="flexbox-bar-graph"] tbody tr td:nth-of-type(1) span {
+ background: var(--bar-color-1);
+}
+[data-id="flexbox-bar-graph"] tbody tr td:nth-of-type(2) span {
+ background: var(--bar-color-2);
+}
+[data-id="flexbox-bar-graph"] tbody tr td:nth-of-type(3) span {
+ background: var(--bar-color-3);
+}
+[data-id="flexbox-bar-graph"] tbody tr td:nth-of-type(4) span {
+ background: var(--bar-color-4);
+}
+[data-id="flexbox-bar-graph"] tbody tr td:nth-of-type(5) span {
+ background: var(--bar-color-5);
+}
+
+[data-id="flexbox-bar-graph"] tbody tr td p {
+ font-size: 90%;
+ margin: 0;
+ text-align: center;
}
</code></pre>
-<h2>Bonus Styling</h2>
-<p>In the <a target="_blank" href="https://github.com/bradleytaunt/flexbox-bar-graphs">Flexbox Bar Graph</a> repo, I've also included the ability to display these bar graphs horizontally, like so:</p>
-<p><figure>
- <img src="/public/images/flexbox-bar-graph-3.webp" alt="Flexbox Bar Graph Horizontal">
- <figcaption>The flexbox bar graph in the horizontal layout (<a href="/public/images/flexbox-bar-graph-3.webp">direct link to image</a>)</figcaption>
-</figure></p>
+
+<p>}</p></li>
+</ul>
+
+<h2 id="bonus-styling">Bonus Styling</h2>
+
+<p>In the Flexbox Bar Graph repo, I&#8217;ve also included the ability to display these bar graphs horizontally, like so:</p>
+
<p>The change in CSS is actually quite simple to pull this off - you just need to include the <code>data-layout</code> attribute on the table itself.</p>
-<pre><code>[data-layout=&quot;horizontal&quot;] tbody {
+
+<pre><code>[data-layout="horizontal"] tbody {
min-height: auto;
}
-[data-layout=&quot;horizontal&quot;] tbody tr {
+[data-layout="horizontal"] tbody tr {
flex-direction: column;
padding: 0 40px;
}
-[data-layout=&quot;horizontal&quot;] tbody tr th {
+[data-layout="horizontal"] tbody tr th {
width: calc(100% - 80px);
}
-[data-layout=&quot;horizontal&quot;] tbody tr th {
+[data-layout="horizontal"] tbody tr th {
text-align: left;
top: calc(100% + 20px);
}
-[data-layout=&quot;horizontal&quot;] tbody tr td {
+[data-layout="horizontal"] tbody tr td {
flex-direction: row;
height: auto;
justify-content: start;
margin: 10px 0;
}
-[data-layout=&quot;horizontal&quot;] tbody tr td span {
+[data-layout="horizontal"] tbody tr td span {
height: 20px;
width: calc(var(--data-set) * 100%);
}
-[data-layout=&quot;horizontal&quot;] tbody tr td p {
+[data-layout="horizontal"] tbody tr td p {
margin-left: 10px;
}
</code></pre>
-<h2>That's All Folks!</h2>
+
+<h2 id="thats-all-folks">That&#8217;s All Folks!</h2>
+
<p>That just about sums things up. Feel free to check out the Github repo itself, open any issues you find or fork it for your own!</p>
+
<ul>
-<li>Github: <a href="https://github.com/bradleytaunt/flexbox-bar-graphs">https://github.com/bradleytaunt/flexbox-bar-graphs</a></li>
-<li>Live Demo: <a href="https://flexbox-bar-graphs.netlify.app/">https://flexbox-bar-graphs.netlify.app/</a></li>
+<li>Github: <a href="https://github.com/bradleytaunt/flexbox-bar-graphs">https:&#47;&#47;github.com&#47;bradleytaunt&#47;flexbox-bar-graphs</a></li>
+<li>Live Demo: <a href="https://flexbox-bar-graphs.netlify.app/">https:&#47;&#47;flexbox-bar-graphs.netlify.app&#47;</a></li>
</ul>
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