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                  <a href="https://github.com/WoltLab/docs.woltlab.com/edit/5.4/docs/javascript/legacy-api.md" title="Edit this page" class="md-content__button md-icon">
                    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20.71 7.04c.39-.39.39-1.04 0-1.41l-2.34-2.34c-.37-.39-1.02-.39-1.41 0l-1.84 1.83 3.75 3.75M3 17.25V21h3.75L17.81 9.93l-3.75-3.75L3 17.25z"/></svg>
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                <h1 id="legacy-javascript-api">Legacy JavaScript API<a class="headerlink" href="#legacy-javascript-api" title="Permanent link">#</a></h1>
<h2 id="introduction">Introduction<a class="headerlink" href="#introduction" title="Permanent link">#</a></h2>
<p>The legacy JavaScript API is the original code that was part of the 2.x series
of WoltLab Suite, formerly known as WoltLab Community Framework. It has been
superseded for the most part by the <a href="../new-api_writing-a-module/">ES5/AMD-modules API</a>
introduced with WoltLab Suite 3.0.</p>
<p>Some parts still exist to this day for backwards-compatibility and because some
less important components have not been rewritten yet. The old API is still
supported, but marked as deprecated and will continue to be replaced parts by
part in future releases, up until their entire removal, including jQuery support.</p>
<p>This guide does not provide any explanation on the usage of those legacy components,
but instead serves as a cheat sheet to convert code to use the new API.</p>
<h2 id="classes">Classes<a class="headerlink" href="#classes" title="Permanent link">#</a></h2>
<h3 id="singletons">Singletons<a class="headerlink" href="#singletons" title="Permanent link">#</a></h3>
<p>Singleton instances are designed to provide a unique "instance" of an object
regardless of when its first instance was created. Due to the lack of a <code>class</code>
construct in ES5, they are represented by mere objects that act as an instance.</p>
<div class="highlight"><pre><span></span><code><span class="c1">// App.js</span>
<span class="nb">window</span><span class="p">.</span><span class="nx">App</span> <span class="o">=</span> <span class="p">{};</span>
<span class="nx">App</span><span class="p">.</span><span class="nx">Foo</span> <span class="o">=</span> <span class="p">{</span>
  <span class="nx">bar</span><span class="o">:</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{}</span>
<span class="p">};</span>

<span class="c1">// --- NEW API ---</span>

<span class="c1">// App/Foo.js</span>
<span class="nx">define</span><span class="p">([],</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{</span>
  <span class="s2">&quot;use strict&quot;</span><span class="p">;</span>

  <span class="k">return</span> <span class="p">{</span>
    <span class="nx">bar</span><span class="o">:</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{}</span>
  <span class="p">};</span>
<span class="p">});</span>
</code></pre></div>
<h3 id="regular-classes">Regular Classes<a class="headerlink" href="#regular-classes" title="Permanent link">#</a></h3>
<div class="highlight"><pre><span></span><code><span class="c1">// App.js</span>
<span class="nb">window</span><span class="p">.</span><span class="nx">App</span> <span class="o">=</span> <span class="p">{};</span>
<span class="nx">App</span><span class="p">.</span><span class="nx">Foo</span> <span class="o">=</span> <span class="nx">Class</span><span class="p">.</span><span class="nx">extend</span><span class="p">({</span>
  <span class="nx">bar</span><span class="o">:</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{}</span>
<span class="p">});</span>

<span class="c1">// --- NEW API ---</span>

<span class="c1">// App/Foo.js</span>
<span class="nx">define</span><span class="p">([],</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{</span>
  <span class="s2">&quot;use strict&quot;</span><span class="p">;</span>

  <span class="kd">function</span> <span class="nx">Foo</span><span class="p">()</span> <span class="p">{};</span>
  <span class="nx">Foo</span><span class="p">.</span><span class="nx">prototype</span> <span class="o">=</span> <span class="p">{</span>
    <span class="nx">bar</span><span class="o">:</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{}</span>
  <span class="p">};</span>

  <span class="k">return</span> <span class="nx">Foo</span><span class="p">;</span>
<span class="p">});</span>
</code></pre></div>
<h4 id="inheritance">Inheritance<a class="headerlink" href="#inheritance" title="Permanent link">#</a></h4>
<div class="highlight"><pre><span></span><code><span class="c1">// App.js</span>
<span class="nb">window</span><span class="p">.</span><span class="nx">App</span> <span class="o">=</span> <span class="p">{};</span>
<span class="nx">App</span><span class="p">.</span><span class="nx">Foo</span> <span class="o">=</span> <span class="nx">Class</span><span class="p">.</span><span class="nx">extend</span><span class="p">({</span>
  <span class="nx">bar</span><span class="o">:</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{}</span>
<span class="p">});</span>
<span class="nx">App</span><span class="p">.</span><span class="nx">Baz</span> <span class="o">=</span> <span class="nx">App</span><span class="p">.</span><span class="nx">Foo</span><span class="p">.</span><span class="nx">extend</span><span class="p">({</span>
  <span class="nx">makeSnafucated</span><span class="o">:</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{}</span>
<span class="p">});</span>

<span class="c1">// --- NEW API ---</span>

<span class="c1">// App/Foo.js</span>
<span class="nx">define</span><span class="p">([],</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{</span>
  <span class="s2">&quot;use strict&quot;</span><span class="p">;</span>

  <span class="kd">function</span> <span class="nx">Foo</span><span class="p">()</span> <span class="p">{};</span>
  <span class="nx">Foo</span><span class="p">.</span><span class="nx">prototype</span> <span class="o">=</span> <span class="p">{</span>
    <span class="nx">bar</span><span class="o">:</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{}</span>
  <span class="p">};</span>

  <span class="k">return</span> <span class="nx">Foo</span><span class="p">;</span>
<span class="p">});</span>

<span class="c1">// App/Baz.js</span>
<span class="nx">define</span><span class="p">([</span><span class="s2">&quot;Core&quot;</span><span class="p">,</span> <span class="s2">&quot;./Foo&quot;</span><span class="p">],</span> <span class="kd">function</span><span class="p">(</span><span class="nx">Core</span><span class="p">,</span> <span class="nx">Foo</span><span class="p">)</span> <span class="p">{</span>
  <span class="s2">&quot;use strict&quot;</span><span class="p">;</span>

  <span class="kd">function</span> <span class="nx">Baz</span><span class="p">()</span> <span class="p">{};</span>
  <span class="nx">Core</span><span class="p">.</span><span class="nx">inherit</span><span class="p">(</span><span class="nx">Baz</span><span class="p">,</span> <span class="nx">Foo</span><span class="p">,</span> <span class="p">{</span>
    <span class="nx">makeSnafucated</span><span class="o">:</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{}</span>
  <span class="p">});</span>

  <span class="k">return</span> <span class="nx">Baz</span><span class="p">;</span>
<span class="p">});</span>
</code></pre></div>
<h2 id="ajax-requests">Ajax Requests<a class="headerlink" href="#ajax-requests" title="Permanent link">#</a></h2>
<div class="highlight"><pre><span></span><code><span class="c1">// App.js</span>
<span class="nx">App</span><span class="p">.</span><span class="nx">Foo</span> <span class="o">=</span> <span class="nx">Class</span><span class="p">.</span><span class="nx">extend</span><span class="p">({</span>
  <span class="nx">_proxy</span><span class="o">:</span> <span class="kc">null</span><span class="p">,</span>

  <span class="nx">init</span><span class="o">:</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{</span>
    <span class="k">this</span><span class="p">.</span><span class="nx">_proxy</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">WCF</span><span class="p">.</span><span class="nx">Action</span><span class="p">.</span><span class="nb">Proxy</span><span class="p">({</span>
      <span class="nx">success</span><span class="o">:</span> <span class="nx">$</span><span class="p">.</span><span class="nx">proxy</span><span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">_success</span><span class="p">,</span> <span class="k">this</span><span class="p">)</span>
    <span class="p">});</span>
  <span class="p">},</span>

  <span class="nx">bar</span><span class="o">:</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{</span>
    <span class="k">this</span><span class="p">.</span><span class="nx">_proxy</span><span class="p">.</span><span class="nx">setOption</span><span class="p">(</span><span class="s2">&quot;data&quot;</span><span class="p">,</span> <span class="p">{</span>
      <span class="nx">actionName</span><span class="o">:</span> <span class="s2">&quot;baz&quot;</span><span class="p">,</span>
      <span class="nx">className</span><span class="o">:</span> <span class="s2">&quot;app\\foo\\FooAction&quot;</span><span class="p">,</span>
      <span class="nx">objectIDs</span><span class="o">:</span> <span class="p">[</span><span class="mf">1</span><span class="p">,</span> <span class="mf">2</span><span class="p">,</span> <span class="mf">3</span><span class="p">],</span>
      <span class="nx">parameters</span><span class="o">:</span> <span class="p">{</span>
        <span class="nx">foo</span><span class="o">:</span> <span class="s2">&quot;bar&quot;</span><span class="p">,</span>
        <span class="nx">baz</span><span class="o">:</span> <span class="kc">true</span>
      <span class="p">}</span>
    <span class="p">});</span>
    <span class="k">this</span><span class="p">.</span><span class="nx">_proxy</span><span class="p">.</span><span class="nx">sendRequest</span><span class="p">();</span>
  <span class="p">},</span>

  <span class="nx">_success</span><span class="o">:</span> <span class="kd">function</span><span class="p">(</span><span class="nx">data</span><span class="p">)</span> <span class="p">{</span>
    <span class="c1">// ajax request result</span>
  <span class="p">}</span>
<span class="p">});</span>

<span class="c1">// --- NEW API ---</span>

<span class="c1">// App/Foo.js</span>
<span class="nx">define</span><span class="p">([</span><span class="s2">&quot;Ajax&quot;</span><span class="p">],</span> <span class="kd">function</span><span class="p">(</span><span class="nx">Ajax</span><span class="p">)</span> <span class="p">{</span>
  <span class="s2">&quot;use strict&quot;</span><span class="p">;</span>

  <span class="kd">function</span> <span class="nx">Foo</span><span class="p">()</span> <span class="p">{}</span>
  <span class="nx">Foo</span><span class="p">.</span><span class="nx">prototype</span> <span class="o">=</span> <span class="p">{</span>
    <span class="nx">bar</span><span class="o">:</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{</span>
      <span class="nx">Ajax</span><span class="p">.</span><span class="nx">api</span><span class="p">(</span><span class="k">this</span><span class="p">,</span> <span class="p">{</span>
        <span class="nx">objectIDs</span><span class="o">:</span> <span class="p">[</span><span class="mf">1</span><span class="p">,</span> <span class="mf">2</span><span class="p">,</span> <span class="mf">3</span><span class="p">],</span>
        <span class="nx">parameters</span><span class="o">:</span> <span class="p">{</span>
          <span class="nx">foo</span><span class="o">:</span> <span class="s2">&quot;bar&quot;</span><span class="p">,</span>
          <span class="nx">baz</span><span class="o">:</span> <span class="kc">true</span>
        <span class="p">}</span>
      <span class="p">});</span>
    <span class="p">},</span>

    <span class="c1">// magic method!</span>
    <span class="nx">_ajaxSuccess</span><span class="o">:</span> <span class="kd">function</span><span class="p">(</span><span class="nx">data</span><span class="p">)</span> <span class="p">{</span>
      <span class="c1">// ajax request result</span>
    <span class="p">},</span>

    <span class="c1">// magic method!</span>
    <span class="nx">_ajaxSetup</span><span class="o">:</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{</span>
      <span class="k">return</span> <span class="p">{</span>
        <span class="nx">actionName</span><span class="o">:</span> <span class="s2">&quot;baz&quot;</span><span class="p">,</span>
        <span class="nx">className</span><span class="o">:</span> <span class="s2">&quot;app\\foo\\FooAction&quot;</span>
      <span class="p">}</span>
    <span class="p">}</span>
  <span class="p">}</span>

  <span class="k">return</span> <span class="nx">Foo</span><span class="p">;</span>
<span class="p">});</span>
</code></pre></div>
<h2 id="phrases">Phrases<a class="headerlink" href="#phrases" title="Permanent link">#</a></h2>
<div class="highlight"><pre><span></span><code><span class="p">&lt;</span><span class="nt">script</span> <span class="na">data-relocate</span><span class="o">=</span><span class="s">&quot;true&quot;</span><span class="p">&gt;</span>
<span class="nx">$</span><span class="p">(</span><span class="kd">function</span><span class="p">()</span> <span class="p">{</span>
  <span class="nx">WCF</span><span class="p">.</span><span class="nx">Language</span><span class="p">.</span><span class="nx">addObject</span><span class="p">({</span>
    <span class="s1">&#39;app.foo.bar&#39;</span><span class="o">:</span> <span class="s1">&#39;{lang}app.foo.bar{/lang}&#39;</span>
  <span class="p">});</span>

  <span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="nx">WCF</span><span class="p">.</span><span class="nx">Language</span><span class="p">.</span><span class="nx">get</span><span class="p">(</span><span class="s2">&quot;app.foo.bar&quot;</span><span class="p">));</span>
<span class="p">});</span>
<span class="p">&lt;/</span><span class="nt">script</span><span class="p">&gt;</span>

<span class="c">&lt;!-- NEW API --&gt;</span>

<span class="p">&lt;</span><span class="nt">script</span> <span class="na">data-relocate</span><span class="o">=</span><span class="s">&quot;true&quot;</span><span class="p">&gt;</span>
<span class="nx">require</span><span class="p">([</span><span class="s2">&quot;Language&quot;</span><span class="p">],</span> <span class="kd">function</span><span class="p">(</span><span class="nx">Language</span><span class="p">)</span> <span class="p">{</span>
  <span class="nx">Language</span><span class="p">.</span><span class="nx">addObject</span><span class="p">({</span>
    <span class="s1">&#39;app.foo.bar&#39;</span><span class="o">:</span> <span class="s1">&#39;{jslang}app.foo.bar{/jslang}&#39;</span>
  <span class="p">});</span>

  <span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="nx">Language</span><span class="p">.</span><span class="nx">get</span><span class="p">(</span><span class="s2">&quot;app.foo.bar&quot;</span><span class="p">));</span>
<span class="p">});</span>
<span class="p">&lt;/</span><span class="nt">script</span><span class="p">&gt;</span>
</code></pre></div>
<h2 id="event-listener">Event-Listener<a class="headerlink" href="#event-listener" title="Permanent link">#</a></h2>
<div class="highlight"><pre><span></span><code><span class="p">&lt;</span><span class="nt">script</span> <span class="na">data-relocate</span><span class="o">=</span><span class="s">&quot;true&quot;</span><span class="p">&gt;</span>
<span class="nx">$</span><span class="p">(</span><span class="kd">function</span><span class="p">()</span> <span class="p">{</span>
  <span class="nx">WCF</span><span class="p">.</span><span class="nx">System</span><span class="p">.</span><span class="nx">Event</span><span class="p">.</span><span class="nx">addListener</span><span class="p">(</span><span class="s2">&quot;app.foo.bar&quot;</span><span class="p">,</span> <span class="s2">&quot;makeSnafucated&quot;</span><span class="p">,</span> <span class="kd">function</span><span class="p">(</span><span class="nx">data</span><span class="p">)</span> <span class="p">{</span>
    <span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="s2">&quot;Event was invoked.&quot;</span><span class="p">);</span>
  <span class="p">});</span>

  <span class="nx">WCF</span><span class="p">.</span><span class="nx">System</span><span class="p">.</span><span class="nx">Event</span><span class="p">.</span><span class="nx">fireEvent</span><span class="p">(</span><span class="s2">&quot;app.foo.bar&quot;</span><span class="p">,</span> <span class="s2">&quot;makeSnafucated&quot;</span><span class="p">,</span> <span class="p">{</span> <span class="nx">some</span><span class="o">:</span> <span class="s2">&quot;data&quot;</span> <span class="p">});</span>
<span class="p">});</span>
<span class="p">&lt;/</span><span class="nt">script</span><span class="p">&gt;</span>

<span class="c">&lt;!-- NEW API --&gt;</span>

<span class="p">&lt;</span><span class="nt">script</span> <span class="na">data-relocate</span><span class="o">=</span><span class="s">&quot;true&quot;</span><span class="p">&gt;</span>
<span class="nx">require</span><span class="p">([</span><span class="s2">&quot;EventHandler&quot;</span><span class="p">],</span> <span class="kd">function</span><span class="p">(</span><span class="nx">EventHandler</span><span class="p">)</span> <span class="p">{</span>
  <span class="nx">EventHandler</span><span class="p">.</span><span class="nx">add</span><span class="p">(</span><span class="s2">&quot;app.foo.bar&quot;</span><span class="p">,</span> <span class="s2">&quot;makeSnafucated&quot;</span><span class="p">,</span> <span class="kd">function</span><span class="p">(</span><span class="nx">data</span><span class="p">)</span> <span class="p">{</span>
    <span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="s2">&quot;Event was invoked&quot;</span><span class="p">);</span>
  <span class="p">});</span>

  <span class="nx">EventHandler</span><span class="p">.</span><span class="nx">fire</span><span class="p">(</span><span class="s2">&quot;app.foo.bar&quot;</span><span class="p">,</span> <span class="s2">&quot;makeSnafucated&quot;</span><span class="p">,</span> <span class="p">{</span> <span class="nx">some</span><span class="o">:</span> <span class="s2">&quot;data&quot;</span> <span class="p">});</span>
<span class="p">});</span>
<span class="p">&lt;/</span><span class="nt">script</span><span class="p">&gt;</span>
</code></pre></div>
                
                  
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