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diff --git a/build/dynamic-checkboxes/index.html b/build/dynamic-checkboxes/index.html new file mode 100644 index 0000000..9adb9f2 --- /dev/null +++ b/build/dynamic-checkboxes/index.html @@ -0,0 +1,409 @@ +<!doctype html> +<html lang="en" id="top"> +<head> + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1"> + <link rel="icon" href="data:,"> + <title>Dynamic Checkboxes</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> +</head> + +<nav> + <a href="#menu">Menu ↓</a> +</nav> + +<main> +<h1>Dynamic Checkboxes</h1> +<p>2019-07-30</p> +<p>Checkboxes are used quite frequently on forms across the web. Whether you're selecting a pricing plan during a site's sign-up process or just simply selecting to opt-out from a newsletter, you have most likely interacted with some form of checkbox element.</p> +<p>What if we could make everyday checkboxes more beautiful <em>and</em> more intuitive? <em>It's easier than you think</em>. We only need a small amount of CSS and JavaScript to make considerable improvements to your average checkbox UX.</p> +<p>Let's get into it.</p> +<h2>What we are building</h2> +<p>Take a look and play around with the CodePen below to get an idea of what we are going to build. The premise is a simple add-on pricing form which calculates the additional monthly total to the user in real-time.</p> +<p><a href="https://codepen.io/bradleytaunt/pen/rXWEpy/">Live CodePen Example</a></p> +<h2>The Structure (HTML)</h2> +<p>As always, we will start by breaking down the "bones" of the HTML structure for this checkbox form. Let's take a look at the HTML in it's entirety (don't worry, it is a lot more simple than it seems at first glance):</p> +<pre><code><h2>Add-ons</h2> + +<input class="checkbox-btn" name="checkbox-collection" id="checkbox-1" type="checkbox" value="49"> +<label class="checkbox-label" for="checkbox-1"> + <span> + White-labeled Domain + <em>Use your own custom domain with SSL security included.</em> + </span> + <span>$49/mo</span> +</label> + +<input class="checkbox-btn" name="checkbox-collection" id="checkbox-2" type="checkbox" value="49"> +<label class="checkbox-label" for="checkbox-2"> + <span> + API Access + <em>Make API calls to perform custom serving and account actions.</em> + </span> + <span>$49/mo</span> +</label> + +<input class="checkbox-btn" name="checkbox-collection" id="checkbox-3" type="checkbox" value="349"> +<label class="checkbox-label" for="checkbox-3"> + <span> + Priority Support + <em>A dedicated account manager to assist your team with ongoing deployments.</em> + </span> + <span>$349/mo</span> +</label> + +<div class="total-cost"> + <h2>Your Plan</h2> + <div> + <span>$</span> + <span id="total-cost-inner">0</span> + <input id="output" type="text" value="0" disabled/> + <span>/mo</span> + </div> +</div> +</code></pre> +<h3>The checkbox inputs & labels</h3> +<pre><code><!-- #1 --> +<input class="checkbox-btn" name="checkbox-collection" id="checkbox-1" type="checkbox" value="49"> + +<!-- #2 --> +<label class="checkbox-label" for="checkbox-1"> + + <!-- #2i --> + <span> + White-labeled Domain + <em>Use your own custom domain with SSL security included.</em> + </span> + + <!-- #2ii --> + <span>$49/mo</span> + +</label> +</code></pre> +<ol> +<li><p>This input will be hidden via <code>position:absolute</code> by default. All checkbox inputs need to share the same <code>name</code> value and all checkboxes require their our custom <code>id</code> that will link with the corresponding <code>for</code> value on the label.</p> +</li> +<li>This label needs it's <code>for</code> value to correspond with it's partnered checkbox.</li> +</ol> +<p> - i) The first span holds the title and description information of the add-on + - ii) The last span holds the cost associated with the current add-on</p> +<h3>The total cost container output</h3> +<pre><code><!-- #1 --> +<div class="total-cost"> + + <h2>Your Plan</h2> + + <!-- #2 --> + <div> + + <!-- #2i --> + <span>$</span> + + <!-- #2ii --> + <span id="total-cost-inner">0</span> + + <!-- #2iii --> + <input id="output" type="text" value="0" disabled/> + + <!-- #2iv --> + <span>/mo</span> + + </div> + +</div> +</code></pre> +<ol> +<li><p>A simple <code>div</code> with a class we can easily target later</p> +</li> +<li><p>A <code>div</code> parent container is needed to house all the total <code>spans</code> together (more on this when we get into the CSS) + - i) The first <code>span</code> holds the static currency symbol + - ii) The second <code>span</code> is where our updated cost will be injected + - iii) This input field is required for us to take-in the <code>value</code> of the associated <code>:checked</code> inputs and add them together. This current value is then used for the injection into the second <code>span</code> + - iv) The final <code>span</code> simply holds the static monthly duration content</p> +</li> +</ol> +<p>All that's all we need for the HTML!</p> +<h2>The Visuals (CSS)</h2> +<p>Again, lets take a look at the entire file before we break it down step-by-step:</p> +<pre><code>.checkbox-label { + align-items: center; + background-color: none; + border: 1px solid lightgrey; + border-radius: 5px; + cursor: pointer; + display: flex; + font-weight: 600; + justify-content: space-between; + margin: 0 auto 10px; + padding: 20px 20px 20px 70px; + position: relative; + transition: .3s ease all; + width: 100%; +} +.checkbox-label span:last-child { + padding: 0 0 0 20px; +} +.checkbox-label:hover { + background-color: rgba(255,255,255,0.2); +} +.checkbox-label:before { + background-repeat: no-repeat; + background-position: center; + background-size: 15px; + border: 1px solid lightgrey; + border-radius: 50%; + content:''; + height: 30px; + left: 20px; + position: absolute; + top: calc(50% - 15px); + transition: .3s ease background-color; + width: 30px; +} +.checkbox-label:hover:before { + background-image: + url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="23.571429" height="23.571429" viewBox="0.000000 -47.142857 23.571429 23.571429"><path fill="lightgrey" d="M23.571429 -36.964286L23.571429 -33.750000C23.571429 -33.303571 23.415179 -32.924107 23.102679 -32.611607C22.790179 -32.299107 22.410714 -32.142857 21.964286 -32.142857L15.000000 -32.142857L15.000000 -25.178571C15.000000 -24.732143 14.843750 -24.352679 14.531250 -24.040179C14.218750 -23.727679 13.839286 -23.571429 13.392857 -23.571429L10.178571 -23.571429C9.732143 -23.571429 9.352679 -23.727679 9.040179 -24.040179C8.727679 -24.352679 8.571429 -24.732143 8.571429 -25.178571L8.571429 -32.142857L1.607143 -32.142857C1.160714 -32.142857 0.781250 -32.299107 0.468750 -32.611607C0.156250 -32.924107 0.000000 -33.303571 0.000000 -33.750000L0.000000 -36.964286C0.000000 -37.410714 0.156250 -37.790179 0.468750 -38.102679C0.781250 -38.415179 1.160714 -38.571429 1.607143 -38.571429L8.571429 -38.571429L8.571429 -45.535714C8.571429 -45.982143 8.727679 -46.361607 9.040179 -46.674107C9.352679 -46.986607 9.732143 -47.142857 10.178571 -47.142857L13.392857 -47.142857C13.839286 -47.142857 14.218750 -46.986607 14.531250 -46.674107C14.843750 -46.361607 15.000000 -45.982143 15.000000 -45.535714L15.000000 -38.571429L21.964286 -38.571429C22.410714 -38.571429 22.790179 -38.415179 23.102679 -38.102679C23.415179 -37.790179 23.571429 -37.410714 23.571429 -36.964286ZM23.571429 -36.964286"></path></svg>'); +} +.checkbox-label span { + -webkit-user-select: none; + -moz-user-select: none; + user-select: none; +} +.checkbox-label span em { + display: block; + font-size: 80%; + font-style: normal; + font-weight: 400; + line-height: 1.2; +} +.checkbox-btn { + position: absolute; + visibility: hidden; +} +.checkbox-btn:checked + .checkbox-label { + background-color: white; + border-color: mediumpurple; + box-shadow: 0 2px 4px rgba(0,0,0,0.05); +} +.checkbox-btn:checked + .checkbox-label:before { + background-color: mediumpurple; + background-image: + url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="25.948661" height="19.888393" viewBox="2.025670 -40.011161 25.948661 19.888393"><path fill="white" d="M27.974330 -36.127232C27.974330 -35.680804 27.818080 -35.301339 27.505580 -34.988839L15.385045 -22.868304L13.108259 -20.591518C12.795759 -20.279018 12.416295 -20.122768 11.969866 -20.122768C11.523438 -20.122768 11.143973 -20.279018 10.831473 -20.591518L8.554688 -22.868304L2.494420 -28.928571C2.181920 -29.241071 2.025670 -29.620536 2.025670 -30.066964C2.025670 -30.513393 2.181920 -30.892857 2.494420 -31.205357L4.771205 -33.482143C5.083705 -33.794643 5.463170 -33.950893 5.909598 -33.950893C6.356027 -33.950893 6.735491 -33.794643 7.047991 -33.482143L11.969866 -28.543527L22.952009 -39.542411C23.264509 -39.854911 23.643973 -40.011161 24.090402 -40.011161C24.536830 -40.011161 24.916295 -39.854911 25.228795 -39.542411L27.505580 -37.265625C27.818080 -36.953125 27.974330 -36.573661 27.974330 -36.127232ZM27.974330 -36.127232"></path></svg>'); + border-color: mediumpurple; +} + +.total-cost { + align-items: baseline; + border-top: 1px solid lightgrey; + display: flex; + justify-content: space-between; + margin-top: 40px; + padding: 40px 20px 0; +} +.total-cost div { + align-items: baseline; + display: flex; +} +.total-cost span:nth-child(1) { + align-self: flex-start; + padding-top: 5px; +} +.total-cost span:nth-child(2) { + font-size: 32px; + font-weight: bold; +} +.total-cost input { + display: none; +} + +@media(max-width:480px) { + .checkbox-label { + align-items: flex-start; + flex-direction: column; + flex-wrap: wrap; + } + .checkbox-label span:last-child { + padding: 10px 0 0 0; + } +} +</code></pre> +<h3>The checkbox label</h3> +<pre><code>/* +This is the main element for each checkbox "container". +Inside it houses the title, description and price. +*/ +.checkbox-label { + align-items: center; + background-color: none; + border: 1px solid lightgrey; + border-radius: 5px; + cursor: pointer; + display: flex; + font-weight: 600; + justify-content: space-between; + margin: 0 auto 10px; + padding: 20px 20px 20px 70px; + position: relative; + transition: .3s ease all; + width: 100%; +} +.checkbox-label:hover { + background-color: rgba(255,255,255,0.2); +} + +/* Update the label styling when the input is :checked */ +.checkbox-btn:checked + .checkbox-label { + background-color: white; + border-color: mediumpurple; + box-shadow: 0 2px 4px rgba(0,0,0,0.05); +} +</code></pre> +<h3>The custom checkbox input</h3> +<p>We need to hide the browser's default checkbox input and replace it with our own using pseudo selectors.</p> +<pre><code>/* Hide browser default input */ +.checkbox-btn { + position: absolute; + visibility: hidden; +} + +/* Our custom input checkbox */ +.checkbox-label:before { + background-repeat: no-repeat; + background-position: center; + background-size: 15px; + border: 1px solid lightgrey; + border-radius: 50%; + content:''; + height: 30px; + left: 20px; + position: absolute; + top: calc(50% - 15px); + transition: .3s ease background-color; + width: 30px; +} + +/* +Here we add a simple '+' icon on hover +to our custom pseudo element. +Adding it as an inline SVG gives us the +ability to fully customize it's styling +*/ +.checkbox-label:hover:before { + background-image: + url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="23.571429" height="23.571429" viewBox="0.000000 -47.142857 23.571429 23.571429"><path fill="lightgrey" d="M23.571429 -36.964286L23.571429 -33.750000C23.571429 -33.303571 23.415179 -32.924107 23.102679 -32.611607C22.790179 -32.299107 22.410714 -32.142857 21.964286 -32.142857L15.000000 -32.142857L15.000000 -25.178571C15.000000 -24.732143 14.843750 -24.352679 14.531250 -24.040179C14.218750 -23.727679 13.839286 -23.571429 13.392857 -23.571429L10.178571 -23.571429C9.732143 -23.571429 9.352679 -23.727679 9.040179 -24.040179C8.727679 -24.352679 8.571429 -24.732143 8.571429 -25.178571L8.571429 -32.142857L1.607143 -32.142857C1.160714 -32.142857 0.781250 -32.299107 0.468750 -32.611607C0.156250 -32.924107 0.000000 -33.303571 0.000000 -33.750000L0.000000 -36.964286C0.000000 -37.410714 0.156250 -37.790179 0.468750 -38.102679C0.781250 -38.415179 1.160714 -38.571429 1.607143 -38.571429L8.571429 -38.571429L8.571429 -45.535714C8.571429 -45.982143 8.727679 -46.361607 9.040179 -46.674107C9.352679 -46.986607 9.732143 -47.142857 10.178571 -47.142857L13.392857 -47.142857C13.839286 -47.142857 14.218750 -46.986607 14.531250 -46.674107C14.843750 -46.361607 15.000000 -45.982143 15.000000 -45.535714L15.000000 -38.571429L21.964286 -38.571429C22.410714 -38.571429 22.790179 -38.415179 23.102679 -38.102679C23.415179 -37.790179 23.571429 -37.410714 23.571429 -36.964286ZM23.571429 -36.964286"></path></svg>'); +} + +/* +When the checkbox input is :checked we need to +update the inline SVG to use a checkmark symbol +*/ +.checkbox-btn:checked + .checkbox-label:before { + background-color: mediumpurple; + background-image: + url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="25.948661" height="19.888393" viewBox="2.025670 -40.011161 25.948661 19.888393"><path fill="white" d="M27.974330 -36.127232C27.974330 -35.680804 27.818080 -35.301339 27.505580 -34.988839L15.385045 -22.868304L13.108259 -20.591518C12.795759 -20.279018 12.416295 -20.122768 11.969866 -20.122768C11.523438 -20.122768 11.143973 -20.279018 10.831473 -20.591518L8.554688 -22.868304L2.494420 -28.928571C2.181920 -29.241071 2.025670 -29.620536 2.025670 -30.066964C2.025670 -30.513393 2.181920 -30.892857 2.494420 -31.205357L4.771205 -33.482143C5.083705 -33.794643 5.463170 -33.950893 5.909598 -33.950893C6.356027 -33.950893 6.735491 -33.794643 7.047991 -33.482143L11.969866 -28.543527L22.952009 -39.542411C23.264509 -39.854911 23.643973 -40.011161 24.090402 -40.011161C24.536830 -40.011161 24.916295 -39.854911 25.228795 -39.542411L27.505580 -37.265625C27.818080 -36.953125 27.974330 -36.573661 27.974330 -36.127232ZM27.974330 -36.127232"></path></svg>'); + border-color: mediumpurple; +} +</code></pre> +<h3>The total cost container</h3> +<p>We only need some very basic flexbox styling for our bottom "total" container:</p> +<pre><code>.total-cost { + align-items: baseline; + border-top: 1px solid lightgrey; + display: flex; + justify-content: space-between; + margin-top: 40px; + padding: 40px 20px 0; +} +.total-cost div { + align-items: baseline; + display: flex; +} +.total-cost span:nth-child(1) { + align-self: flex-start; + padding-top: 5px; +} +.total-cost span:nth-child(2) { + font-size: 32px; + font-weight: bold; +} + +/* +This input is used in our JavaScript - look at the +function part of this post to understand why +*/ +.total-cost input { + display: none; +} +</code></pre> +<h3>Last but not least - mobile</h3> +<p>Now we just ensure that on smaller devices our checkbox labels render nicely:</p> +<pre><code>@media(max-width:480px) { + /* + Avoids the inner label content from squishing together + and becoming unreadable + */ + .checkbox-label { + align-items: flex-start; + flex-direction: column; + flex-wrap: wrap; + } + .checkbox-label span:last-child { + padding: 10px 0 0 0; + } +} +</code></pre> +<p>That's it for the styling!</p> +<h2>The Function (JS)</h2> +<p>As you can see below, we only need a very minor amount of JavaScript to accomplish our total cost "injection".</p> +<pre><code>window.onload=function(){ + +// Place the default browser checkbox inputs into a variable +var inputs = document.getElementsByClassName('checkbox-btn') + +// Now we loop through the inputs and check if they are +// greater than zero. If so, we run our function. +for (var i=0; i < inputs.length; i++) { + + inputs[i].onchange = function() { + + // Create `add` variable which takes the :checked input value + var add = this.value * (this.checked ? 1 : -1); + + // We grab the current total value on our hidden input field and return it + // as a floating point number + // (since in this use case it will be a price number based on currency) + var new_total = parseFloat(document.getElementById('output').value); + + // Now we simply add the existing total value with the newly ":checked" input value + var updated_total = document.getElementById('output').value=new_total + add + + // Place the new updated total directly inside the `total-cost-inner` span element + document.getElementById('total-cost-inner').innerHTML = updated_total; + } + +} +} +</code></pre> +<p>That's it! Feel free to play with the demo some more at the top of the post, or check out the <a href="https://codepen.io/bradleytaunt/pen/rXWEpy">CodePen source directly</a>.</p> +<footer role="contentinfo"> + <h2>Menu Navigation</h2> + <ul id="menu"> + <li><a href="/">Home</a></li> + <li><a href="/projects">Projects</a></li> + <li><a href="/uses">Uses</a></li> + <li><a href="/wiki">Wiki</a></li> + <li><a href="/resume">Resume</a></li> + <li><a href="/colophon">Colophon</a></li> + <li><a href="/now">Now</a></li> + <li><a href="/donate">Donate</a></li> + <li><a href="/atom.xml">RSS</a></li> + <li><a href="#top">↑ Top of the page</a></li> + </ul> + <small> + Built with <a href="https://git.sr.ht/~bt/barf">barf</a>. <br> + Maintained with ♥ for the web. <br> + Proud supporter of <a href="https://usefathom.com/ref/DKHJVX">Fathom</a> & <a href="https://nextdns.io/?from=74d3p3h8">NextDNS</a>. <br> + The content for this site is <a href="https://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>.<br> The <a href="https://git.sr.ht/~bt/bt.ht">code for this site</a> is <a href="https://git.sr.ht/~bt/bt.ht/tree/master/item/LICENSE">MIT</a>. + </small> +</footer>
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