WAI-ARIA 基礎

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<input type="date" /> <input type="range" />

<header>
  <h1>Header</h1>

  <!-- Even is it's not mandatory, it's common practice to put the main navigation menu within the main header -->

  <nav>
    <ul>
      <li><a href="#">Home</a></li>
      <li><a href="#">Team</a></li>
      <li><a href="#">Projects</a></li>
      <li><a href="#">Contact</a></li>
    </ul>

    <!-- A Search form is another common non-linear way to navigate through a website. -->

    <form>
      <input type="search" name="q" placeholder="Search query" />
      <input type="submit" value="Go!" />
    </form>
  </nav>
</header>

<!-- Here is our page's main content -->
<main>
  <!-- It contains an article -->
  <article>
    <h2>Article heading</h2>

    <p>
      Lorem ipsum dolor sit amet, consectetur adipisicing elit. Donec a diam
      lectus. Set sit amet ipsum mauris. Maecenas congue ligula as quam viverra
      nec consectetur ant hendrerit. Donec et mollis dolor. Praesent et diam
      eget libero egestas mattis sit amet vitae augue. Nam tincidunt congue
      enim, ut porta lorem lacinia consectetur.
    </p>

    <h3>subsection</h3>

    <p>
      Donec ut librero sed accu vehicula ultricies a non tortor. Lorem ipsum
      dolor sit amet, consectetur adipisicing elit. Aenean ut gravida lorem. Ut
      turpis felis, pulvinar a semper sed, adipiscing id dolor.
    </p>
  </article>

  <!-- the aside content can also be nested within the main content -->
  <aside>
    <h2>Related</h2>

    <ul>
      <li><a href="#">Oh I do like to be beside the seaside</a></li>
      <li><a href="#">Oh I do like to be beside the sea</a></li>
      <li><a href="#">Although in the North of England</a></li>
      <li><a href="#">It never stops raining</a></li>
      <li><a href="#">Oh well...</a></li>
    </ul>
  </aside>
</main>

<!-- And here is our main footer that is used across all the pages of our website -->

<footer>
  <p>©Copyright 2050 by nobody. All rights reversed.</p>
</footer>

/* || General setup */

html,
body {
  margin: 0;
  padding: 0;
}

html {
  font-size: 10px;
  background-color: darkgrey;
}

body {
  width: max(70vw, 90%);
  margin: 0 auto;
  padding: 0 10px;
  display: flex;
  flex-direction: column;
}

/* || typography */

h1,
h2,
h3 {
  font-family: "Sonsie One", cursive;
  color: #2a2a2a;
}

p,
input,
li {
  font-family: "Open Sans Condensed", sans-serif;
  color: #2a2a2a;
}

h1 {
  font-size: 4rem;
  text-align: center;
  color: white;
  text-shadow: 2px 2px 10px black;
}

h2 {
  font-size: 3rem;
  text-align: center;
}

h3 {
  font-size: 2.2rem;
}

p,
li {
  font-size: 1.6rem;
  line-height: 1.5;
}

/* || header layout */

header {
  margin-bottom: 10px;
}

nav,
article,
aside,
footer {
  background-color: white;
  padding: 1%;
}

nav {
  background-color: #ff80ff;
  display: flex;
  gap: 2vw;
  @media (width <= 650px) {
    flex-direction: column;
  }
}

nav ul {
  padding: 0;
  list-style-type: none;
  flex: 2;
  display: flex;
  gap: 2vw;
}

nav li {
  display: inline;
  text-align: center;
}

nav a {
  display: inline-block;
  font-size: 2rem;
  text-transform: uppercase;
  text-decoration: none;
  color: black;
}

nav form {
  flex: 1;
  display: flex;
  align-items: center;
  height: 100%;
}

input {
  font-size: 1.6rem;
  height: 32px;
}

input[type="search"] {
  flex: 3;
}

input[type="submit"] {
  flex: 1;
  margin-left: 1rem;
  background: #333333;
  border: 0;
  color: white;
}

/* || main layout */

main {
  display: flex;
  gap: 2vw;
  @media (width <= 650px) {
    flex-direction: column;
  }
}

article {
  flex: 4;
}

aside {
  flex: 1;
  background-color: #ff80ff;
}

aside li {
  padding-bottom: 10px;
}

footer {
  margin-top: 10px;
}

<header>
  <h1>Header</h1>

  <!-- Even is it's not mandatory, it's common practice to put the main navigation menu within the main header -->

  <nav>
    <ul>
      <li><a href="#">Home</a></li>
      <li><a href="#">Our team</a></li>
      <li><a href="#">Projects</a></li>
      <li><a href="#">Contact</a></li>
    </ul>

    <!-- A Search form is another common non-linear way to navigate through a website. -->

    <search>
      <form>
        <input
          type="search"
          name="q"
          placeholder="Search query"
          aria-label="Search through site content" />
        <input type="submit" value="Go!" />
      </form>
    </search>
  </nav>
</header>

<!-- Here is our page's main content -->
<main>
  <!-- It contains an article -->
  <article>
    <h2>Article heading</h2>

    <p>
      Lorem ipsum dolor sit amet, consectetur adipisicing elit. Donec a diam
      lectus. Set sit amet ipsum mauris. Maecenas congue ligula as quam viverra
      nec consectetur ant hendrerit. Donec et mollis dolor. Praesent et diam
      eget libero egestas mattis sit amet vitae augue. Nam tincidunt congue
      enim, ut porta lorem lacinia consectetur.
    </p>

    <h3>subsection</h3>

    <p>
      Donec ut librero sed accu vehicula ultricies a non tortor. Lorem ipsum
      dolor sit amet, consectetur adipisicing elit. Aenean ut gravida lorem. Ut
      turpis felis, pulvinar a semper sed, adipiscing id dolor.
    </p>

    <p>
      Pelientesque auctor nisi id magna consequat sagittis. Curabitur dapibus,
      enim sit amet elit pharetra tincidunt feugiat nist imperdiet. Ut convallis
      libero in urna ultrices accumsan. Donec sed odio eros.
    </p>
  </article>

  <!-- the aside content can also be nested within the main content -->
  <aside>
    <h2>Related</h2>
    <ul>
      <li><a href="#">Oh I do like to be beside the seaside</a></li>
      <li><a href="#">Oh I do like to be beside the sea</a></li>
      <li><a href="#">Although in the North of England</a></li>
      <li><a href="#">It never stops raining</a></li>
      <li><a href="#">Oh well...</a></li>
    </ul>
  </aside>
</main>

<!-- And here is our main footer that is used across all the pages of our website -->

<footer>
  <p>©Copyright 2050 by nobody. All rights reversed.</p>
</footer>

/* || General setup */

html,
body {
  margin: 0;
  padding: 0;
}

html {
  font-size: 10px;
  background-color: darkgrey;
}

body {
  width: max(70vw, 90%);
  margin: 0 auto;
  padding: 0 10px;
  display: flex;
  flex-direction: column;
}

/* || typography */

h1,
h2,
h3 {
  font-family: "Sonsie One", cursive;
  color: #2a2a2a;
}

p,
input,
li {
  font-family: "Open Sans Condensed", sans-serif;
  color: #2a2a2a;
}

h1 {
  font-size: 4rem;
  text-align: center;
  color: white;
  text-shadow: 2px 2px 10px black;
}

h2 {
  font-size: 3rem;
  text-align: center;
}

h3 {
  font-size: 2.2rem;
}

p,
li {
  font-size: 1.6rem;
  line-height: 1.5;
}

/* || header layout */

header {
  margin-bottom: 10px;
}

nav,
article,
aside,
footer {
  background-color: white;
  padding: 1%;
}

nav {
  background-color: #ff80ff;
  display: flex;
  gap: 2vw;
  @media (width <= 650px) {
    flex-direction: column;
  }
}

nav ul {
  padding: 0;
  list-style-type: none;
  flex: 2;
  display: flex;
  gap: 2vw;
}

nav li {
  display: inline;
  text-align: center;
}

nav a {
  display: inline-block;
  font-size: 2rem;
  text-transform: uppercase;
  text-decoration: none;
  color: black;
}

nav form {
  flex: 1;
  display: flex;
  align-items: center;
  height: 100%;
}

input {
  font-size: 1.6rem;
  height: 32px;
}

input[type="search"] {
  flex: 3;
}

input[type="submit"] {
  flex: 1;
  margin-left: 1rem;
  background: #333333;
  border: 0;
  color: white;
}

/* || main layout */

main {
  display: flex;
  gap: 2vw;
  @media (width <= 650px) {
    flex-direction: column;
  }
}

article {
  flex: 4;
}

aside {
  flex: 1;
  background-color: #ff80ff;
}

aside li {
  padding-bottom: 10px;
}

footer {
  margin-top: 10px;
}

<header>
  <h1>…</h1>
  <nav>
    <ul>
      …
    </ul>
    <search>
      <form>
        <!-- search form -->
      </form>
    </search>
  </nav>
</header>

<main>
  <article>…</article>
  <aside>…</aside>
</main>

<footer>…</footer>

<input
  type="search"
  name="q"
  placeholder="Search query"
  aria-label="Search through site content" />

<section>
  <h1>Random quote generator</h1>
  <button>Start giving me quotes</button>
  <blockquote>
    <p></p>
  </blockquote>
</section>

* {
  box-sizing: border-box;
}

html {
  font-family: sans-serif;
}

html,
body {
  height: 100%;
}

h1 {
  letter-spacing: 2px;
}

p {
  line-height: 1.6;
}

section {
  height: 100%;
  padding: 10px;
  background: #666666;
  text-shadow: 1px 1px 1px black;
  color: white;
}

let quotes = [
  {
    quote:
      "Every child is an artist. The problem is how to remain an artist once he grows up.",
    author: "Pablo Picasso",
  },
  {
    quote:
      "You can never cross the ocean until you have the courage to lose sight of the shore.",
    author: "Christopher Columbus",
  },
  {
    quote:
      "I love deadlines. I love the whooshing noise they make as they go by.",
    author: "Douglas Adams",
  },
];

const quotePara = document.querySelector("section p");
const btn = document.querySelector("button");

btn.addEventListener("click", () => {
  function showQuote() {
    let random = Math.floor(Math.random() * quotes.length);
    quotePara.textContent = `${quotes[random].quote} -- ${quotes[random].author}`;
  }

  showQuote();
  btn.disabled = true;
  window.setInterval(showQuote, 5000);
});

<blockquote aria-live="assertive">…</blockquote>

<section>
  <h1>Random quote generator</h1>
  <button>Start giving me quotes</button>
  <blockquote aria-live="assertive">
    <p></p>
  </blockquote>
</section>

<div class="errors" role="alert" aria-relevant="all">
  <ul></ul>
</div>

<p class="hidden-alert" aria-live="assertive"></p>

function toggleMusician(bool) {
  const instrument = formItems[formItems.length - 1];
  if (bool) {
    instrument.input.disabled = false;
    instrument.label.style.color = "black";
    instrument.input.setAttribute("aria-disabled", "false");
    hiddenAlert.textContent =
      "Instruments played field now enabled; use it to tell us what you play.";
  } else {
    instrument.input.disabled = true;
    instrument.label.style.color = "#999999";
    instrument.input.setAttribute("aria-disabled", "true");
    instrument.input.removeAttribute("aria-label");
    hiddenAlert.textContent = "Instruments played field now disabled.";
  }
}

<div data-message="This is from the first button" tabindex="0" role="button">
  Click me!
</div>