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來自 CodePen 的完全相同的代碼不起作用 - MDC 未定義錯誤

[英]Exact Same Code from CodePen Not Working - MDC Not Defined Error

 原文  2019-11-22 12:51:15  3   1    javascript

問題描述

我從這個Codepen 復制了這段代碼。 但是，在我的控制台中，即使我正在鏈接所需的 Javascript，我也可以看到“mdc 未定義”錯誤。 我哪里錯了？


<html lang="en">

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width,initial-scale=1,shrink-to-fit=no">
  <link href="https://fonts.googleapis.com/css?family=Roboto+Mono" rel="stylesheet">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/8.0.0/normalize.min.css">
  <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,400,500,700">
  <link rel="stylesheet" href="https://unpkg.com/material-components-web@latest/dist/material-components-web.min.css">
  <link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
  <link rel="stylesheet" href="./test.css">
  <script>src="https://unpkg.com/material-components-web@latest/dist/material-components-web.min.js"</script>
  <script>
      // Instantiate MDC Drawer
    const drawerEl = document.querySelector('.mdc-drawer');
    const drawer = new mdc.drawer.MDCDrawer.attachTo(drawerEl);

    // Instantiate MDC Top App Bar (required)
    const topAppBarEl = document.querySelector('.mdc-top-app-bar');
    const topAppBar = new mdc.topAppBar.MDCTopAppBar.attachTo(topAppBarEl);

    topAppBar.setScrollTarget(document.querySelector('.main-content'));
    topAppBar.listen('MDCTopAppBar:nav', () => {
      drawer.open = !drawer.open;
    });
  </script>
</head>
<body>

  <!-- Top App Bar -->
<header class="mdc-top-app-bar">
    <div class="mdc-top-app-bar__row">
      <section class="mdc-top-app-bar__section mdc-top-app-bar__section--align-start">
        <button class="mdc-top-app-bar__navigation-icon mdc-icon-button material-icons" href="#">menu</button>
        <a class="mdc-top-app-bar__title" href="https://www.webdenim.io" target="_blank" style="color: inherit;">Webdenim</a>
      </section>
    </div>
  </header>

  <div class="app-drawer-layout mdc-top-app-bar--fixed-adjust">
    <!-- Drawer -->
    <aside class="mdc-drawer mdc-drawer--dismissible demo-drawer">
      <nav class="mdc-drawer__drawer">
        <nav class="mdc-drawer__content">
          <div id="icon-with-text-demo" class="mdc-list">
            <a class="mdc-list-item mdc-list-item--selected demo-drawer-list-item" href="#">
              <i class="material-icons mdc-list-item__graphic" aria-hidden="true">inbox</i>Inbox
            </a>
            <a class="mdc-list-item demo-drawer-list-item" href="#">
              <i class="material-icons mdc-list-item__graphic" aria-hidden="true">star</i>Star
            </a>
            <a class="mdc-list-item demo-drawer-list-item" href="#">
              <i class="material-icons mdc-list-item__graphic" aria-hidden="true">send</i>Sent Mail
            </a>
            <a class="mdc-list-item demo-drawer-list-item" href="#">
              <i class="material-icons mdc-list-item__graphic" aria-hidden="true">drafts</i>Drafts
            </a>
          </div>

          <hr class="mdc-list-divider">

          <div class="mdc-list">
            <a class="mdc-list-item demo-drawer-list-item" href="#">
              <i class="material-icons mdc-list-item__graphic" aria-hidden="true">email</i>All Mail
            </a>
            <a class="mdc-list-item demo-drawer-list-item" href="#">
              <i class="material-icons mdc-list-item__graphic" aria-hidden="true">delete</i>Trash
            </a>
            <a class="mdc-list-item demo-drawer-list-item" href="#">
              <i class="material-icons mdc-list-item__graphic" aria-hidden="true">report</i>Spam
            </a>
          </div>
        </nav>
      </nav>
    </aside>

    <!-- Content -->
    <main class="mdc-drawer-app-content main-content">
      <div class="demo-image">
        <svg id="Layer_1" xmlns="http://www.w3.org/2000/svg" xml:space="preserve" viewBox="0 0 362 176" width="362px" height="176px" version="1.1" y="0px" x="0px" xmlns:xlink="http://www.w3.org/1999/xlink" enable-background="new 0 0 362 176" class="docs-homescreen-empty-sites-svg"><g opacity=".08"><path d="m96.7 91.8h-29.4c-2.3 0-4.2 1.9-4.2 4.2v29.4c0 2.3 1.9 4.2 4.2 4.2h29.4c2.3 0 4.2-1.9 4.2-4.2v-29.4c0-2.3-1.9-4.2-4.2-4.2zm-21 29.4h-4.2v-8.4h4.2v8.4zm8.4 0h-4.2v-14.7h4.2v14.7zm8.4 0h-4.2v-21h4.2v21z"></path><rect y="85.5" x="56.8" height="50.4" width="50.4" fill="none"></rect><rect y="69.5" x="-1" height="26.5" width="26.5" fill="none"></rect><path d="m20 72.8h-15.5c-1.2 0-2.2 1-2.2 2.2v15.4c0 1.2 1 2.2 2.2 2.2h15.5c1.2 0 2.2-1 2.2-2.2v-15.4c0-1.2-1-2.2-2.2-2.2zm-2.2 6.6h-11v-2.2h11v2.2zm0 4.5h-11v-2.2h11v2.2zm-3.4 4.4h-7.7v-2.2h7.7v2.2z"></path><path d="m330 109.6h-29.4c-2.3 0-4.2 1.9-4.2 4.2v29.4c0 2.3 1.9 4.2 4.2 4.2h29.4c2.3 0 4.2-1.9 4.2-4.2v-29.4c0-2.3-1.9-4.2-4.2-4.2zm-21.1 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10.9-0.5c2.2-0.7 2.7-5.5 2.7-10.4s-0.5-9.7-2.6-10.4zm-13.7 16.5v-12.2l8.2 6.1-8.2 6.1z"></path></g><path d="m296.8 51h-21.2c-1.7 0-3 1.4-3 3v21.2c0 1.7 1.3 3 3 3h21.2c1.7 0 3-1.4 3-3v-21.1c0-1.7-1.3-3.1-3-3.1zm0 19.7h-21.2v-12.1h21.2v12.1z"></path><rect y="46.5" x="268.1" height="36.3" width="36.3" fill="none"></rect></g><g opacity=".1"><path d="m283.1 22.7c0-2.8-2.3-5.1-5.1-5.1h-177c-2.8 0-5.1 2.3-5.1 5.1v134.8c0 2.8 2.3 5.1 5.1 5.1h177c2.8 0 5.1-2.3 5.1-5.1v-134.8z" fill="#232421"></path></g><path d="m283.1 20.7c0-2.8-2.3-5.1-5.1-5.1h-177c-2.8 0-5.1 2.3-5.1 5.1v134.8c0 2.8 2.3 5.1 5.1 5.1h177c2.8 0 5.1-2.3 5.1-5.1v-134.8z" fill="#F1F1F1"></path><path d="m278.5 14h-177.4c-2.9 0-5.3 2.3-5.3 5.1v15.6h187.3v-15.6c0-2.8-1.7-5.1-4.6-5.1" fill="#A5A5A4"></path><rect y="22" x="134.8" height="6" width="120.4" fill="#E9E9E9"></rect><polygon points="107.8 22 104.8 25 107.8 28" fill="#E9E9E9"></polygon><polygon points="113.8 28 116.8 25 113.8 22" fill="#E9E9E9"></polygon><path d="m122.8 25c0 1.7 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width="6.1" y="156.1" x="77.5" fill="#fff"></rect><polygon points="333.7 55.6 328.3 50.2 333.7 44.9 339 50.2" fill="#fff"></polygon><polygon points="14.8 108.5 12.2 106 14.8 103.4 17.3 106" fill="#fff"></polygon><polygon points="341.7 150.9 339.1 148.3 341.7 145.8 344.3 148.3" fill="#fff"></polygon><rect transform="matrix(.7071 .7071 -.7071 .7071 73.277 -28.003)" height="4.5" width="4.5" y="72.2" x="68.2" fill="#fff"></rect></svg>
      </div>
      <div class="demo__title">Click the menu button</div>
      <div class="demo__subtitle"> at the top left of the page to toggle the drawer</div>
    </main>
  </div>

  </body>

</html>

1 個解決方案

解決方案1
 2  2019-11-22 12:55:51

腳本注入有問題

<script>src="https://unpkg.com/material-components-web@latest/dist/material-components-web.min.js"</script>

它應該是

<script src="https://unpkg.com/material-components-web@latest/dist/material-components-web.min.js"></script>

暫無
暫無

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