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如何在顯示模態時阻止垂直滾動

CSS
劉姿婷1年前8瀏覽0評論

在我的React項目中，我需要顯示一個移動屏幕的模型，它需要覆蓋整個屏幕并阻止下方內容的滾動。當模態顯示時，我試圖通過useEffect為body隱藏overflow- y: hidden，但是我認為這不是一個理想的方法，因為我需要一個只有CSS的解決方案。然后我看到bootstrap模式已經只用CSS做到了。 代碼如下:

<!DOCTYPE html>
<html>
  <head>
    <title>Parcel Sandbox</title>
    <meta charset="UTF-8" />
    <link
      href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css"
      rel="stylesheet"
      integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3"
      crossorigin="anonymous"
    />
  </head>

  <body>
    <div class="container">
      <div class="row">
        <div class="col-4"></div>
        <div class="col-4">
          <!-- Button trigger modal -->
          <button
            type="button"
            class="btn btn-primary"
            data-bs-toggle="modal"
            data-bs-target="#exampleModal"
          >
            Launch demo modal
          </button>
          <p>
            "Sed ut perspiciatis unde omnis iste natus error sit voluptatem
            accusantium doloremque laudantium, totam rem aperiam, eaque ipsa
            quae ab illo inventore veritatis et quasi architecto beatae vitae
            dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit
            aspernatur aut odit aut fugit, sed quia consequuntur magni dolores
            eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est,
            qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit,
            sed quia non numquam eius modi tempora incidunt ut labore et dolore
            magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis
            nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut
            aliquid ex ea commodi consequatur? Quis autem vel eum iure
            reprehenderit qui in ea voluptate velit esse quam nihil molestiae
            consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla
            pariatur?"
          </p>

          <!-- Modal -->
          <div
            class="modal fade"
            id="exampleModal"
            tabindex="-1"
            aria-labelledby="exampleModalLabel"
            aria-hidden="true"
          >
            <div class="modal-dialog">
              <div class="modal-content">
                <div class="modal-header">
                  <h5 class="modal-title" id="exampleModalLabel">
                    Modal title
                  </h5>
                  <button
                    type="button"
                    class="btn-close"
                    data-bs-dismiss="modal"
                    aria-label="Close"
                  ></button>
                </div>
                <div class="modal-body">
                  <p>
                    Lorem ipsum dolor sit amet, consectetur adipiscing elit.
                    Nullam lacinia elit tempor suscipit tincidunt. Mauris ac
                  </p>
                  <select
                    class="form-select"
                    aria-label="Default select example"
                  >
                    <option selected>Open this select menu</option>
                    <option value="1">One</option>
                    <option value="2">Two</option>
                    <option value="3">Three</option>
                  </select>

                  <div class="dropdown">
                    <button
                      class="btn btn-secondary dropdown-toggle"
                      type="button"
                      id="dropdownMenuButton1"
                      data-bs-toggle="dropdown"
                      aria-expanded="false"
                    >
                      Dropdown button
                    </button>
                    <ul
                      class="dropdown-menu"
                      aria-labelledby="dropdownMenuButton1"
                    >
                      <li><a class="dropdown-item" href="#">Action</a></li>
                      <li>
                        <a class="dropdown-item" href="#">Another action</a>
                      </li>
                      <li>
                        <a class="dropdown-item" href="#"
                          >Something else here</a
                        >
                      </li>
                    </ul>
                  </div>
                </div>
                <div class="modal-footer">
                  <button
                    type="button"
                    class="btn btn-secondary"
                    data-bs-dismiss="modal"
                  >
                    Close
                  </button>
                  <button type="button" class="btn btn-primary">
                    Save changes
                  </button>
                </div>
              </div>
            </div>
          </div>
        </div>
        <div class="col-4"></div>
      </div>
    </div>

    <script
      src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.10.2/dist/umd/popper.min.js"
      integrity="sha384-7+zCNj/IqJ95wo16oMtfsKbZ9ccEh31eOz1HGyDuCQ6wgnyJNSYdrPa03rtR1zdB"
      crossorigin="anonymous"
    ></script>
    <script
      src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.min.js"
      integrity="sha384-QJHtvGhmr9XOIpI6YVutG+2QOK9T+ZnN4kzFN1RtK3zEFEIsxhlmWl5/YESvpZ13"
      crossorigin="anonymous"
    ></script>

    <script src="src/index.js"></script>
  </body>
</html>

誰能從上面的代碼中看出哪個引導類阻止了內容的滾動？ 這里是更好的演示代碼沙盒鏈接:https://codesandbox.io/s/bootstrap-modal-locking-gryh94