物化視差不起作用

Question

我在頁面上添加了視差代碼，但是圖像沒有出現，當我從圖像容器中刪除“視差”類時，圖像出現了，但是沒有視差效果，

  <div class="parallax-container">
    <div class="parallax"><img src="content/img/wood.jpg"></div>
  </div>
  <div class="section white">
    <div class="row container">
      <h2 class="header">Parallax</h2>
      <p class="grey-text text-darken-3 lighten-3">Parallax is an effect where the background content or image in this case, is moved at a different speed than the foreground content while scrolling.</p>
    </div>
  </div>
  <div class="parallax-container">
    <div class="parallax"><img src="content/img/wood.jpg"></div>
  </div>


<script type="text/javascript">
var elem = document.querySelector('.parallax');
var instance = M.Parallax.init(elem, options);

// Or with jQuery

$(document).ready(function(){
$('.parallax').parallax();
});

</script>

這些是我添加的庫

  <script src="app\lib\angular.min.js"></script>
  <script src="app\lib\angular-route.min.js"></script>
  <script src="app\lib\angular-aria.min.js"></script>
  <script src="app\lib\angular-messages.min.js"></script>
  <script src="app\lib\angular-animate.min.js"></script>
  <link rel="stylesheet" href="app\lib\angular-material.min.css">
  <script src="app\lib\angular-material.min.js"></script>
  <link rel="stylesheet" href="content/css/styles.css">
  <!--Materialize-->
  <link href="materialize\css\icon.css" rel="stylesheet">
  <link rel="stylesheet" href="materialize/css/materialize.min.css">
  <link rel="stylesheet" href="app\lib\Roboto.css">
  <script src="app\app.js"></script>
<script type="text/javascript" src="materialize\js\jquery.3.2.1.min.js"></script>
   <script src="materialize\js\materialize.min.js"></script>

Answer 1

您的錯誤在於嘗試在Javascript代碼中兩次初始化該函數。 同樣（至少在我看來是這樣），我偶爾會在初始化組件實現時使用香草JS接收錯誤。 您可以執行的操作：（刪除原始JS代碼並將其添加到文件末尾，最好在body標簽末尾下方）

<script>
 $(document).ready(function(){
  $('.parallax').parallax();
 });
</script>

確保在實現腳本之前調用jquery，如下所示：

 <script type="text/javascript" src="materialize\js\jquery.3.2.1.min.js"> 
 </script>
 <script src="materialize\js\materialize.min.js"></script>