Rating/index.html at main · ixd-system-design/Rating · GitHub

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<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <meta
    name="viewport"
    content="width=device-width"
  >
  <title>Rating Scale Input - Custom Radio Buttons with SVG and CSS</title>

  <!--Typography via Adobe Fonts -->
  <link
    rel="stylesheet"
    href="https://use.typekit.net/hqg7rfa.css"
  >

  <link
    href="style.css"
    rel="stylesheet"
    type="text/css"
  />
</head>

<body>

  <h2>Rating Scale Input</h2>
  <h3>Custom Radio Buttons with SVG and CSS</h3>

  <form>

    <fieldset id="water">
      <legend>Thirsty?</legend>
      <div class="droplets">

        <input
          type="radio"
          id="w5"
          name="water"
          value="5"
        />
        <label for="w5">
          <svg viewbox="0 0 24 24">
            <use
              class="inactive"
              href="#inactive"
            />
            <use
              class="active"
              href="#active"
            />
          </svg>
        </label>

        <input
          type="radio"
          id="w4"
          name="water"
          value="4"
        />
        <label for="w4">
          <svg viewbox="0 0 24 24">
            <use
              class="inactive"
              href="#inactive"
            />
            <use
              class="active"
              href="#active"
            />
          </svg>
        </label>

        <input
          type="radio"
          id="w3"
          name="water"
          value="3"
        />
        <label for="w3">
          <svg viewbox="0 0 24 24">
            <use
              class="inactive"
              href="#inactive"
            />
            <use
              class="active"
              href="#active"
            />
          </svg>
        </label>

        <input
          type="radio"
          id="w2"
          name="water"
          value="2"
        />
        <label for="w2">
          <svg viewbox="0 0 24 24">
            <use
              class="inactive"
              href="#inactive"
            />
            <use
              class="active"
              href="#active"
            />
          </svg>
        </label>

        <input
          type="radio"
          id="w1"
          name="water"
          value="1"
          checked
        />
        <label for="w1">
          <svg viewbox="0 0 24 24">
            <use
              class="inactive"
              href="#inactive"
            />
            <use
              class="active"
              href="#active"
            />
          </svg>
        </label>

      </div>
    </fieldset>

    <div id="status">Rating is 1</div>

  </form>


  <p>This page uses standard <a
      target="_blank"
      href="https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/radio"
    >radio buttons</a> to implement a user interface for rating on a scale of one to five. Thematic water drops riff on
    the more conventional "star". </p>

  <p>Vector artwork is defined directly in index.html as <a
      target="_blank"
      href="https://developer.mozilla.org/en-US/docs/Web/SVG/Tutorial/SVG_In_HTML_Introduction"
    >inline SVG</a> markup. Specifically, we create a set of <a
      target="_blank"
      href="https://developer.mozilla.org/en-US/docs/Web/SVG/Element/symbol"
    >SVG symbols</a>, strategically named <b>#active</b> and <b>#inactive</b>. These symbols are re-used several times
    (in our radio button labels) via the SVG <a
      target="_blank"
      href="https://developer.mozilla.org/en-US/docs/Web/SVG/Element/use"
    >use</a> tag. Importantly, <a
      target="_blank"
      href="https://developer.mozilla.org/en-US/docs/Web/SVG/Tutorial/SVG_In_HTML_Introduction"
    >Inline SVGs</a> are adjustable via CSS (e.g. we can change the <a
      target="_blank"
      href="https://developer.mozilla.org/en-US/docs/Web/SVG/Tutorial/Fills_and_Strokes"
    >fill</a> on <a
      target="_blank"
      href="https://developer.mozilla.org/en-US/docs/Web/CSS/:hover"
    >:hover</a>).</p>

  <p>Droplets appear in descending order (5-4-3-2-1) in HTML, but this arrangement is flipped in CSS via <a
      target="_blank"
      href="https://developer.mozilla.org/en-US/docs/Web/CSS/flex-direction"
    >flex-direction: row-reverse</a>. This approach makes it possible to exploit <a
      target="_blank"
      href="https://developer.mozilla.org/en-US/docs/Web/CSS/Subsequent-sibling_combinator"
    >Subsequent Sibling</a> (<a
      target="_blank"
      href="https://developer.mozilla.org/en-US/docs/Web/CSS/Subsequent-sibling_combinator"
    >~</a>) logic in CSS. <i>Note that CSS lacks a "prior sibling" combinator</i>. To show / hide the inactive / active
    SVG symbols, we use the <a
      target="_blank"
      href="https://developer.mozilla.org/en-US/docs/Web/CSS/:checked"
    >:checked</a> and <a
      target="_blank"
      href="https://developer.mozilla.org/en-US/docs/Web/CSS/:hover"
    >:hover</a> psuedo-classes to toggle <b>display: none</b> and <b>display: block</b>.</p>

  <p> As a caviat, keep in mind that this sort of adaptation involves tradeoffs between visual appearance, brand,
    usability, and accessibility.</p>

  <p>For comparison (and further inspiration) note that it's also possible to do this without SVGs. For example, <a
      target="_blank"
      href="https://codepen.io/jamesbarnett/pen/najzYK"
    >this codepen by James Barnett</a> employs Font Awesome icons and the <a
      target="_blank"
      href="https://developer.mozilla.org/en-US/docs/Web/CSS/::before"
    >::before</a> pseudo-element. Remember that there are many ways to solve a problem. What other CSS or
    JavaScript-based approaches can you find?</p>

  <p>This demo was created by <a
      target="_blank"
      href="https://nsitu.ca"
    >Harold Sikkema</a>. </p>

  <!-- Below we define a set of SVG symbols for active and inactive -->
  <svg>
    <symbol id="inactive">
      <path
        d="M12 2c-5.33 4.55-8 8.48-8 11.8 0 4.98 3.8 8.2 8 8.2s8-3.22 8-8.2c0-3.32-2.67-7.25-8-11.8zm0 18c-3.35 0-6-2.57-6-6.2 0-2.34 1.95-5.44 6-9.14 4.05 3.7 6 6.79 6 9.14 0 3.63-2.65 6.2-6 6.2z"
      />
    </symbol>
    <symbol id="active">
      <path d="M12 2c-5.33 4.55-8 8.48-8 11.8 0 4.98 3.8 8.2 8 8.2s8-3.22 8-8.2c0-3.32-2.67-7.25-8-11.8z" />
    </symbol>
  </svg>

  <script src="script.js"></script>

</body>

</html>