Die Anleitung zu Javascript HashChangeEvent

HashChangeEvent

1. HashChangeEvent

Hash ist "Der Anker Teil" (Anchor part) eines URL. Es sagt den Browser, den Scrollbar des Browser zu scrollen um den Hash entsprechenden Inhaltsbereich anzuzeigen.

Das Beispiel über Hash:

hash-example.html

<!DOCTYPE html>
<html>
   <head>
      <title>Hash Example</title>
      <meta charset="UTF-8">
      <style>
         .content {
            margin-top: 30px;
            padding: 5px;
            border: 1px solid #ddd;
         }
      </style>
   </head>
   <body>
       <a href="#chapter1">Go to Chapter 1</a>
        ||
       <a href="#chapter2">Go to Chapter 2</a>
        ||
       <a href="#chapter3">Go to Chapter 3</a>

      <div class="content">
         <!-- Anchor 1 -->
         <a id="chapter1"></a>
         <h3>Chapter 1</h3>
             Chapter 1 content <br/>
             Chapter 1 content <br/>
             Chapter 1 content <br/>
             Chapter 1 content <br/>
             Chapter 1 content <br/>
             Chapter 1 content <br/>
             Chapter 1 content <br/>
             Chapter 1 content <br/>
             Chapter 1 content <br/>

         <!-- Anchor 2 -->
         <a id="chapter2"></a>
         <h3>Chapter 2</h3>
             Chapter 2 content <br/>
             Chapter 2 content <br/>
             Chapter 2 content <br/>
             Chapter 2 content <br/>
             Chapter 2 content <br/>
             Chapter 2 content <br/>
             Chapter 2 content <br/>
             Chapter 2 content <br/>
             Chapter 2 content <br/> 
         <!-- Anchor 3 -->
         <a id="chapter3"></a>
         <h3>Chapter 3</h3>
             Chapter 3 content <br/>
             Chapter 3 content <br/>
             Chapter 3 content <br/>
             Chapter 3 content <br/>
             Chapter 3 content <br/>
             Chapter 3 content <br/>
             Chapter 3 content <br/>
             Chapter 3 content <br/>
             Chapter 3 content <br/>
      </div>
      <p id="log-div"></p> 
   </body>
</html>

HashChangeEvent

HashChangeEvent ist eine Sub-Interface von interface Event. Es vertritt das Event, das passiert wenn der Anker Teil (Anchor part) auf URL ändert wird.

Die Events:

Event	Bezeichnung
hashchange	Das Event passiert wenn der Anker Teil (Anchor part) von URL ändert wird.

Die Properties

Property	die Bezeichnung
newURL	URL vom Dokument zurückgeben nachdem Hash ändert wird.
oldURL	URL vom Dokument zurückgeben bevor Hash ändert wird.

Grundsätzlich werden die Properties newURL, oldURL von HashChangeEvent durch allen Browser, außer IE unterstützt.

Das Beispiel über HashChangeEvent:

https://ex1.o7planning.com/javascript/hashchangeevents/hashchangeevents-example.html

hashchangeevents-example.html

<!DOCTYPE html>
<html>
   <head>
      <title>HashChangeEvent Example</title>
      <meta charset="UTF-8">
      <style>
        .content {
           margin-top: 30px;
           padding: 5px;
           border: 1px solid #ddd;
        }
      </style>
      <script>
          function hashchangeHandler(evt)  {
              var msg = "Hash Change! \n"
                     + "event.newURL= "+ evt.newURL +"\n"
                     + "event.oldURL= "+ evt.oldURL ;
              alert(msg);
          }
      </script>
   </head>
   <body onhashchange="hashchangeHandler(event)"> 
            <a href="#chapter1">Go to Chapter 1</a>
             ||
            <a href="#chapter2">Go to Chapter 2</a>
             ||
            <a href="#chapter3">Go to Chapter 3</a>
           <div class="content">
              <!-- Anchor 1 -->
              <a id="chapter1"></a>
              <h3>Chapter 1</h3>
                  Chapter 1 content <br/>
                  Chapter 1 content <br/>
                  Chapter 1 content <br/>
                  Chapter 1 content <br/>
                  Chapter 1 content <br/>
                  Chapter 1 content <br/>
                  Chapter 1 content <br/>
                  Chapter 1 content <br/>
                  Chapter 1 content <br/>
              <!-- Anchor 2 -->
              <a id="chapter2"></a>
              <h3>Chapter 2</h3>
                  Chapter 2 content <br/>
                  Chapter 2 content <br/>
                  Chapter 2 content <br/>
                  Chapter 2 content <br/>
                  Chapter 2 content <br/>
                  Chapter 2 content <br/>
                  Chapter 2 content <br/>
                  Chapter 2 content <br/>
                  Chapter 2 content <br/> 
              <!-- Anchor 3 -->
              <a id="chapter3"></a>
              <h3>Chapter 3</h3>
                  Chapter 3 content <br/>
                  Chapter 3 content <br/>
                  Chapter 3 content <br/>
                  Chapter 3 content <br/>
                  Chapter 3 content <br/>
                  Chapter 3 content <br/>
                  Chapter 3 content <br/>
                  Chapter 3 content <br/>
                  Chapter 3 content <br/>
           </div>
   </body>
</html>

Die Anleitung zu Javascript HashChangeEvent

1. HashChangeEvent

Anleitungen ECMAScript, Javascript

Anleitungen ECMAScript, Javascript

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