Polymer - Molecules Elements

Molecules are elements which are covered with other JavaScript libraries, that help develop an application easily and is used to connect a group of plugins to the Polymer application.

Molecules includes an element called marked-element which is used for wrapping the marked library.

Syntax

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

The <marked-element> element contains the markdown value and displays that value to a child element with the markdown-html class. You can use the marked-element in your application, by running the following command to install it in your project directory.

bower install --save PolymerElements/marked-element

This command will install all the related elements of marked-element under the bower_components folder.

Example

The following example specifies the use of marked-element in Polymer.js. Create an index.html file and add the following code in it.

<!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>

Now create another file called mark-element.html and include the following code.

<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">

//it specifies the start of an element's local DOM
<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>

Output

To run the application, navigate to the created project directory and run the following command.

polymer serve

Now open the browser and navigate to http://127.0.0.1:8000/. Following will be the output.

polymer_elements.htm