Polymer - Molecules 元素

更新于 2025/1/30 3:22:17

Molecules 是覆盖其他 JavaScript 库的元素，可帮助轻松开发应用程序，并用于将一组插件连接到 Polymer 应用程序。

Molecules 包含一个名为 marked-element 的元素，用于包装标记库。

语法

<marked-element markdown = "text here">
<div class = "markdown-html"></div>
</marked-element>

<marked-element> 元素包含 markdown 值，并将该值显示给具有 markdown-html 类的子元素。您可以在应用程序中使用 marked-element，方法是运行以下命令将其安装在项目目录中。

bower install --save PolymerElements/marked-element

此命令将安装 bower_components 文件夹下 marked-element 的所有相关元素。

示例

以下示例指定了在 Polymer.js 中使用 marked-element。创建一个 index.html 文件并在其中添加以下代码。

<!doctype html>
<html>
   <head>
      <title>Polymer Example</title>
      <script src = "bower_components/webcomponentsjs/webcomponents-lite.js"></script>
      <link rel = "import" href = "bower_components/polymer/polymer.html">
      <link rel = "import" href = "bower_components/paper-styles/demo-pages.html">
      <link rel = "import" href = "bower_components/marked-element/marked-element.html">
      <link rel = "import" href = "mark-elemnt.html">
   </head>
   
   <body>
      <mark-elemnt></mark-elemnt>
   </body>
</html>

现在创建另一个名为 mark-element.html 的文件并包含以下代码。

<link rel = "import" href = "bower_components/polymer/polymer-element.html">
<link rel = "import" href = "bower_components/marked-element/marked-element.html">
<link rel = "import" href = "bower_components/paper-styles/demo-pages.html">

//它指定元素本地 DOM 的开始
<dom-module id = "mark-elemnt">
   <template>
      <style>      
         h3 {
            color: orange;
            margin-left: 30px;
         }
         marked-element {
            display: block;
            background-color: grey;
            padding: 10px 30px;
            margin-bottom: 10px;
            width:250px;
         }
      </style>
  
      <h2>Marked Element Example</h2>
      <section>
         <marked-element>
            <div slot = "markdown-html"></div>
            <script type = "text/markdown">
               ## Welcome to Tutorialspoint
               _Tutorialspoint_
            </script>
         </marked-element>
      </section>
    
      <section>
         <h3>Text via Attribute</h3>
         <marked-element markdown = "***Hello World!!!***">
            <div slot = "markdown-html"></div>
         </marked-element>
      </section>
      
   </template>
   
   <script>
      Polymer ({
         is: 'mark-elemnt'
      });
   </script>
</dom-module>