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        <a href="." >Módulos</a>
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                                <h1 id="m&#xF3;dulos">M&#xF3;dulos</h1>
<p>Devido ao uso de uma &#xE1;rvore de um &#xFA;nico estado, todo o estado do nosso aplicativo est&#xE1; contido dentro de um objeto grande. No entanto, &#xE0; medida que nossa aplica&#xE7;&#xE3;o cresce em escala, a <em>store</em>  pode ficar realmente inchada.
Para ajudar com isso, o Vuex nos permite dividir nossa <em>store</em>  em <strong> m&#xF3;dulos </strong>. Cada m&#xF3;dulo pode conter seu pr&#xF3;prio estado, muta&#xE7;&#xF5;es, a&#xE7;&#xF5;es, getters e at&#xE9; mesmo m&#xF3;dulos aninhados &#x2013; tudo &#xE9; &quot;quebrado&quot; daqui pra frente:</p>
<pre class="language-"><code class="lang-js"><span class="token keyword">const</span> moduleA <span class="token operator">=</span> <span class="token punctuation">{</span>
  state<span class="token punctuation">:</span> <span class="token punctuation">{</span> <span class="token operator">...</span> <span class="token punctuation">}</span><span class="token punctuation">,</span>
  mutations<span class="token punctuation">:</span> <span class="token punctuation">{</span> <span class="token operator">...</span> <span class="token punctuation">}</span><span class="token punctuation">,</span>
  actions<span class="token punctuation">:</span> <span class="token punctuation">{</span> <span class="token operator">...</span> <span class="token punctuation">}</span><span class="token punctuation">,</span>
  getters<span class="token punctuation">:</span> <span class="token punctuation">{</span> <span class="token operator">...</span> <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

<span class="token keyword">const</span> moduleB <span class="token operator">=</span> <span class="token punctuation">{</span>
  state<span class="token punctuation">:</span> <span class="token punctuation">{</span> <span class="token operator">...</span> <span class="token punctuation">}</span><span class="token punctuation">,</span>
  mutations<span class="token punctuation">:</span> <span class="token punctuation">{</span> <span class="token operator">...</span> <span class="token punctuation">}</span><span class="token punctuation">,</span>
  actions<span class="token punctuation">:</span> <span class="token punctuation">{</span> <span class="token operator">...</span> <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

<span class="token keyword">const</span> store <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Vuex<span class="token punctuation">.</span>Store</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
  modules<span class="token punctuation">:</span> <span class="token punctuation">{</span>
    a<span class="token punctuation">:</span> moduleA<span class="token punctuation">,</span>
    b<span class="token punctuation">:</span> moduleB
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span>

store<span class="token punctuation">.</span>state<span class="token punctuation">.</span>a <span class="token comment" spellcheck="true">// -&gt; `moduleA`&apos;s state</span>
store<span class="token punctuation">.</span>state<span class="token punctuation">.</span>b <span class="token comment" spellcheck="true">// -&gt; `moduleB`&apos;s state</span>
</code></pre>
<h3 id="estado-do-local-do-modulo">Estado do local do modulo</h3>
<p>Dentro das muta&#xE7;&#xF5;es e getters de um m&#xF3;dulo, o 1&#xBA; argumento recebido ser&#xE1; <strong> o estado local do m&#xF3;dulo </strong>.</p>
<pre class="language-"><code class="lang-js"><span class="token keyword">const</span> moduleA <span class="token operator">=</span> <span class="token punctuation">{</span>
  state<span class="token punctuation">:</span> <span class="token punctuation">{</span> count<span class="token punctuation">:</span> <span class="token number">0</span> <span class="token punctuation">}</span><span class="token punctuation">,</span>
  mutations<span class="token punctuation">:</span> <span class="token punctuation">{</span>
    increment <span class="token punctuation">(</span>state<span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token comment" spellcheck="true">// `state` &#xE9; o estado local do modulo</span>
      state<span class="token punctuation">.</span>count<span class="token operator">++</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">}</span><span class="token punctuation">,</span>

  getters<span class="token punctuation">:</span> <span class="token punctuation">{</span>
    doubleCount <span class="token punctuation">(</span>state<span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token keyword">return</span> state<span class="token punctuation">.</span>count <span class="token operator">*</span> <span class="token number">2</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
<p>Da mesma forma, dentro das a&#xE7;&#xF5;es do m&#xF3;dulo, <code>context.state</code> ir&#xE1; expor o estado local e o estado da raiz ser&#xE1; exposto como<code>context.rootState</code>:</p>
<pre class="language-"><code class="lang-js"><span class="token keyword">const</span> moduleA <span class="token operator">=</span> <span class="token punctuation">{</span>
  <span class="token comment" spellcheck="true">// ...</span>
  actions<span class="token punctuation">:</span> <span class="token punctuation">{</span>
    incrementIfOddOnRootSum <span class="token punctuation">(</span><span class="token punctuation">{</span> state<span class="token punctuation">,</span> commit<span class="token punctuation">,</span> rootState <span class="token punctuation">}</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token punctuation">(</span>state<span class="token punctuation">.</span>count <span class="token operator">+</span> rootState<span class="token punctuation">.</span>count<span class="token punctuation">)</span> <span class="token operator">%</span> <span class="token number">2</span> <span class="token operator">===</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token function">commit</span><span class="token punctuation">(</span><span class="token string">&apos;increment&apos;</span><span class="token punctuation">)</span>
      <span class="token punctuation">}</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
<p>Al&#xE9;m disso, dentro do m&#xF3;dulo getters, o estado da raiz ser&#xE1; exibido como seu 3&#xBA; argumento:</p>
<pre class="language-"><code class="lang-js"><span class="token keyword">const</span> moduleA <span class="token operator">=</span> <span class="token punctuation">{</span>
  <span class="token comment" spellcheck="true">// ...</span>
  getters<span class="token punctuation">:</span> <span class="token punctuation">{</span>
    sumWithRootCount <span class="token punctuation">(</span>state<span class="token punctuation">,</span> getters<span class="token punctuation">,</span> rootState<span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token keyword">return</span> state<span class="token punctuation">.</span>count <span class="token operator">+</span> rootState<span class="token punctuation">.</span>count
    <span class="token punctuation">}</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
<h3 id="namespacing">Namespacing</h3>
<p>Por padr&#xE3;o, a&#xE7;&#xF5;es, muta&#xE7;&#xF5;es e getters dentro de m&#xF3;dulos ainda est&#xE3;o registradas no <strong> namespace global </strong> - isso permite que v&#xE1;rios m&#xF3;dulos reajam com o mesmo tipo de muta&#xE7;&#xE3;o / a&#xE7;&#xE3;o.
Se voc&#xEA; deseja que seus m&#xF3;dulos sejam mais aut&#xF4;nomos ou reutiliz&#xE1;veis, voc&#xEA; pode marc&#xE1;-lo como namespaced com <code>namespaced: true</code>. Quando o m&#xF3;dulo &#xE9; registrado, todos os seus getters, a&#xE7;&#xF5;es e muta&#xE7;&#xF5;es ser&#xE3;o automaticamente escritos com nomes com base no caminho no qual o m&#xF3;dulo est&#xE1; registrado. Por exemplo:</p>
<pre class="language-"><code class="lang-js"><span class="token keyword">const</span> store <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Vuex<span class="token punctuation">.</span>Store</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
  modules<span class="token punctuation">:</span> <span class="token punctuation">{</span>
    account<span class="token punctuation">:</span> <span class="token punctuation">{</span>
      namespaced<span class="token punctuation">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>

      <span class="token comment" spellcheck="true">// module assets</span>
      state<span class="token punctuation">:</span> <span class="token punctuation">{</span> <span class="token operator">...</span> <span class="token punctuation">}</span><span class="token punctuation">,</span> <span class="token comment" spellcheck="true">// O estado do m&#xF3;dulo j&#xE1; est&#xE1; aninhado e n&#xE3;o &#xE9; afetado pela op&#xE7;&#xE3;o de namespaced</span>
       getters<span class="token punctuation">:</span> <span class="token punctuation">{</span>
        isAdmin <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token operator">...</span> <span class="token punctuation">}</span> <span class="token comment" spellcheck="true">// -&gt; getters[&apos;account/isAdmin&apos;]</span>
      <span class="token punctuation">}</span><span class="token punctuation">,</span>
      actions<span class="token punctuation">:</span> <span class="token punctuation">{</span>
        login <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token operator">...</span> <span class="token punctuation">}</span> <span class="token comment" spellcheck="true">// -&gt; dispatch(&apos;account/login&apos;)</span>
      <span class="token punctuation">}</span><span class="token punctuation">,</span>
      mutations<span class="token punctuation">:</span> <span class="token punctuation">{</span>
        login <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token operator">...</span> <span class="token punctuation">}</span> <span class="token comment" spellcheck="true">// -&gt; commit(&apos;account/login&apos;)</span>
      <span class="token punctuation">}</span><span class="token punctuation">,</span>

      <span class="token comment" spellcheck="true">// m&#xF3;dulos aninhados</span>
      modules<span class="token punctuation">:</span> <span class="token punctuation">{</span>
        <span class="token comment" spellcheck="true">// herda o namespace do modulo pai</span>
        myPage<span class="token punctuation">:</span> <span class="token punctuation">{</span>
          state<span class="token punctuation">:</span> <span class="token punctuation">{</span> <span class="token operator">...</span> <span class="token punctuation">}</span><span class="token punctuation">,</span>
          getters<span class="token punctuation">:</span> <span class="token punctuation">{</span>
            profile <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token operator">...</span> <span class="token punctuation">}</span> <span class="token comment" spellcheck="true">// -&gt; getters[&apos;account/profile&apos;]</span>
          <span class="token punctuation">}</span>
        <span class="token punctuation">}</span><span class="token punctuation">,</span>

        <span class="token comment" spellcheck="true">// aninhar ainda mais o namespace</span>
        posts<span class="token punctuation">:</span> <span class="token punctuation">{</span>
          namespaced<span class="token punctuation">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>

          state<span class="token punctuation">:</span> <span class="token punctuation">{</span> <span class="token operator">...</span> <span class="token punctuation">}</span><span class="token punctuation">,</span>
          getters<span class="token punctuation">:</span> <span class="token punctuation">{</span>
            popular <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token operator">...</span> <span class="token punctuation">}</span> <span class="token comment" spellcheck="true">// -&gt; getters[&apos;account/posts/popular&apos;]</span>
          <span class="token punctuation">}</span>
        <span class="token punctuation">}</span>
      <span class="token punctuation">}</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span>
</code></pre>
<p>Os getters e as a&#xE7;&#xF5;es Namespaced receber&#xE3;o <code>getters</code>,<code>dispatch</code> e <code>commit</code> localizados. Em outras palavras, voc&#xEA; pode usar os recursos do m&#xF3;dulo sem prefixo de escrita no mesmo m&#xF3;dulo. Alternar entre namespaced ou n&#xE3;o n&#xE3;o afeta o c&#xF3;digo dentro do m&#xF3;dulo.</p>
<h4 id="acessando-ativos-globais-em-m&#xF3;dulos-de-namespaced">Acessando ativos globais em m&#xF3;dulos de Namespaced</h4>
<p>Se voc&#xEA; quiser usar estado global e getters, <code>rootState</code> e<code>rootGetters</code> s&#xE3;o passados como o 3&#xBA; e 4&#xBA; argumentos para fun&#xE7;&#xF5;es getter, e tamb&#xE9;m expostos como propriedades no objeto <code>context</code> passado para fun&#xE7;&#xF5;es de a&#xE7;&#xE3;o.</p>
<p>Para enviar a&#xE7;&#xF5;es ou fazer um commit de muta&#xE7;&#xF5;es no namespace global, passe <code>{root: true}</code> como o 3&#xBA; argumento para `dispatch &apos;e&apos; commit &apos;.</p>
<pre class="language-"><code class="lang-js">modules<span class="token punctuation">:</span> <span class="token punctuation">{</span>
  foo<span class="token punctuation">:</span> <span class="token punctuation">{</span>
    namespaced<span class="token punctuation">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>

    getters<span class="token punctuation">:</span> <span class="token punctuation">{</span>
      <span class="token comment" spellcheck="true">// `getters` est&#xE1; localizado nos getters deste m&#xF3;dulo</span>
      <span class="token comment" spellcheck="true">// voc&#xEA; pode usar rootGetters como 4&#xBA; argumento de getters</span>
      someGetter <span class="token punctuation">(</span>state<span class="token punctuation">,</span> getters<span class="token punctuation">,</span> rootState<span class="token punctuation">,</span> rootGetters<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        getters<span class="token punctuation">.</span>someOtherGetter <span class="token comment" spellcheck="true">// -&gt; &apos;foo/someOtherGetter&apos;</span>
        rootGetters<span class="token punctuation">.</span>someOtherGetter <span class="token comment" spellcheck="true">// -&gt; &apos;someOtherGetter&apos;</span>
      <span class="token punctuation">}</span><span class="token punctuation">,</span>
      someOtherGetter<span class="token punctuation">:</span> state <span class="token operator">=</span><span class="token operator">&gt;</span> <span class="token punctuation">{</span> <span class="token operator">...</span> <span class="token punctuation">}</span>
    <span class="token punctuation">}</span><span class="token punctuation">,</span>

    actions<span class="token punctuation">:</span> <span class="token punctuation">{</span>
      <span class="token comment" spellcheck="true">// despachar e confirmar tamb&#xE9;m est&#xE3;o localizados para este m&#xF3;dulo</span>
      <span class="token comment" spellcheck="true">// eles aceitar&#xE3;o a op&#xE7;&#xE3;o `root` para o envio / commit da raiz</span>

      someAction <span class="token punctuation">(</span><span class="token punctuation">{</span> dispatch<span class="token punctuation">,</span> commit<span class="token punctuation">,</span> getters<span class="token punctuation">,</span> rootGetters <span class="token punctuation">}</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        getters<span class="token punctuation">.</span>someGetter <span class="token comment" spellcheck="true">// -&gt; &apos;foo/someGetter&apos;</span>
        rootGetters<span class="token punctuation">.</span>someGetter <span class="token comment" spellcheck="true">// -&gt; &apos;someGetter&apos;</span>

        <span class="token function">dispatch</span><span class="token punctuation">(</span><span class="token string">&apos;someOtherAction&apos;</span><span class="token punctuation">)</span> <span class="token comment" spellcheck="true">// -&gt; &apos;foo/someOtherAction&apos;</span>
        <span class="token function">dispatch</span><span class="token punctuation">(</span><span class="token string">&apos;someOtherAction&apos;</span><span class="token punctuation">,</span> <span class="token keyword">null</span><span class="token punctuation">,</span> <span class="token punctuation">{</span> root<span class="token punctuation">:</span> <span class="token boolean">true</span> <span class="token punctuation">}</span><span class="token punctuation">)</span> <span class="token comment" spellcheck="true">// -&gt; &apos;someOtherAction&apos;</span>

        <span class="token function">commit</span><span class="token punctuation">(</span><span class="token string">&apos;someMutation&apos;</span><span class="token punctuation">)</span> <span class="token comment" spellcheck="true">// -&gt; &apos;foo/someMutation&apos;</span>
        <span class="token function">commit</span><span class="token punctuation">(</span><span class="token string">&apos;someMutation&apos;</span><span class="token punctuation">,</span> <span class="token keyword">null</span><span class="token punctuation">,</span> <span class="token punctuation">{</span> root<span class="token punctuation">:</span> <span class="token boolean">true</span> <span class="token punctuation">}</span><span class="token punctuation">)</span> <span class="token comment" spellcheck="true">// -&gt; &apos;someMutation&apos;</span>
      <span class="token punctuation">}</span><span class="token punctuation">,</span>
      someOtherAction <span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> payload<span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token operator">...</span> <span class="token punctuation">}</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
<h4 id="ligando-auxiliares-com-namespace">Ligando Auxiliares com namespace</h4>
<p>Ao vincular um m&#xF3;dulo com namespace aos componentes com os auxiliares <code>mapState</code>,<code>mapGetters</code>, <code>mapActions</code> e<code>mapMutations</code>, ele pode ficar um pouco verboso:</p>
<pre class="language-"><code class="lang-js">computed<span class="token punctuation">:</span> <span class="token punctuation">{</span>
  <span class="token operator">...</span><span class="token function">mapState</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    a<span class="token punctuation">:</span> state <span class="token operator">=</span><span class="token operator">&gt;</span> state<span class="token punctuation">.</span>some<span class="token punctuation">.</span>nested<span class="token punctuation">.</span>module<span class="token punctuation">.</span>a<span class="token punctuation">,</span>
    b<span class="token punctuation">:</span> state <span class="token operator">=</span><span class="token operator">&gt;</span> state<span class="token punctuation">.</span>some<span class="token punctuation">.</span>nested<span class="token punctuation">.</span>module<span class="token punctuation">.</span>b
  <span class="token punctuation">}</span><span class="token punctuation">)</span>
<span class="token punctuation">}</span><span class="token punctuation">,</span>
methods<span class="token punctuation">:</span> <span class="token punctuation">{</span>
  <span class="token operator">...</span><span class="token function">mapActions</span><span class="token punctuation">(</span><span class="token punctuation">[</span>
    <span class="token string">&apos;some/nested/module/foo&apos;</span><span class="token punctuation">,</span>
    <span class="token string">&apos;some/nested/module/bar&apos;</span>
  <span class="token punctuation">]</span><span class="token punctuation">)</span>
<span class="token punctuation">}</span>
</code></pre>
<p>Nesses casos, voc&#xEA; pode passar a string de namespace do m&#xF3;dulo como o 1&#xBA; argumento para os auxiliares para que todas as liga&#xE7;&#xF5;es sejam feitas usando esse m&#xF3;dulo como contexto. O anterior pode ser simplificado para:</p>
<pre class="language-"><code class="lang-js">computed<span class="token punctuation">:</span> <span class="token punctuation">{</span>
  <span class="token operator">...</span><span class="token function">mapState</span><span class="token punctuation">(</span><span class="token string">&apos;some/nested/module&apos;</span><span class="token punctuation">,</span> <span class="token punctuation">{</span>
    a<span class="token punctuation">:</span> state <span class="token operator">=</span><span class="token operator">&gt;</span> state<span class="token punctuation">.</span>a<span class="token punctuation">,</span>
    b<span class="token punctuation">:</span> state <span class="token operator">=</span><span class="token operator">&gt;</span> state<span class="token punctuation">.</span>b
  <span class="token punctuation">}</span><span class="token punctuation">)</span>
<span class="token punctuation">}</span><span class="token punctuation">,</span>
methods<span class="token punctuation">:</span> <span class="token punctuation">{</span>
  <span class="token operator">...</span><span class="token function">mapActions</span><span class="token punctuation">(</span><span class="token string">&apos;some/nested/module&apos;</span><span class="token punctuation">,</span> <span class="token punctuation">[</span>
    <span class="token string">&apos;foo&apos;</span><span class="token punctuation">,</span>
    <span class="token string">&apos;bar&apos;</span>
  <span class="token punctuation">]</span><span class="token punctuation">)</span>
<span class="token punctuation">}</span>
</code></pre>
<p>Al&#xE9;m disso, voc&#xEA; pode criar helpers com nomes usando o <code>createNamespacedHelpers</code>. Ele retorna um objeto com novos auxiliares de liga&#xE7;&#xE3;o de componentes que est&#xE3;o vinculados com o valor de namespace fornecido:</p>
<pre class="language-"><code class="lang-js"><span class="token keyword">import</span> <span class="token punctuation">{</span> createNamespacedHelpers <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">&apos;vuex&apos;</span>

<span class="token keyword">const</span> <span class="token punctuation">{</span> mapState<span class="token punctuation">,</span> mapActions <span class="token punctuation">}</span> <span class="token operator">=</span> <span class="token function">createNamespacedHelpers</span><span class="token punctuation">(</span><span class="token string">&apos;some/nested/module&apos;</span><span class="token punctuation">)</span>

<span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
  computed<span class="token punctuation">:</span> <span class="token punctuation">{</span>
    <span class="token comment" spellcheck="true">// look up in `some/nested/module`</span>
    <span class="token operator">...</span><span class="token function">mapState</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
      a<span class="token punctuation">:</span> state <span class="token operator">=</span><span class="token operator">&gt;</span> state<span class="token punctuation">.</span>a<span class="token punctuation">,</span>
      b<span class="token punctuation">:</span> state <span class="token operator">=</span><span class="token operator">&gt;</span> state<span class="token punctuation">.</span>b
    <span class="token punctuation">}</span><span class="token punctuation">)</span>
  <span class="token punctuation">}</span><span class="token punctuation">,</span>
  methods<span class="token punctuation">:</span> <span class="token punctuation">{</span>
    <span class="token comment" spellcheck="true">// look up in `some/nested/module`</span>
    <span class="token operator">...</span><span class="token function">mapActions</span><span class="token punctuation">(</span><span class="token punctuation">[</span>
      <span class="token string">&apos;foo&apos;</span><span class="token punctuation">,</span>
      <span class="token string">&apos;bar&apos;</span>
    <span class="token punctuation">]</span><span class="token punctuation">)</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
<h4 id="advert&#xEA;ncia-para-desenvolvedores-de-plugin">Advert&#xEA;ncia para desenvolvedores de plugin</h4>
<p>Voc&#xEA; pode se preocupar com o namespacing imprevis&#xED;vel para seus m&#xF3;dulos quando voc&#xEA; cria um <a href="plugins.html">plugin</a> que fornece os m&#xF3;dulos e permite que os usu&#xE1;rios os adicionem a uma <em>store</em>  Vuex. Seus m&#xF3;dulos ser&#xE3;o tamb&#xE9;m escritos por namespacing se os usu&#xE1;rios do plugin adicionarem seus m&#xF3;dulos em um m&#xF3;dulo namespace. Para adaptar esta situa&#xE7;&#xE3;o, talvez seja necess&#xE1;rio receber um valor de namespace atrav&#xE9;s da op&#xE7;&#xE3;o do plugin:</p>
<pre class="language-"><code class="lang-js"><span class="token comment" spellcheck="true">// pega o valor do namespace via op&#xE7;&#xE3;o de plugin</span>
<span class="token comment" spellcheck="true">// e retorna a fun&#xE7;&#xE3;o de plugin Vuex</span>
<span class="token keyword">export</span> <span class="token keyword">function</span> createPlugin <span class="token punctuation">(</span>options <span class="token operator">=</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
  <span class="token keyword">return</span> <span class="token keyword">function</span> <span class="token punctuation">(</span>store<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token comment" spellcheck="true">// add namespace to plugin module&apos;s types</span>
    <span class="token keyword">const</span> namespace <span class="token operator">=</span> options<span class="token punctuation">.</span>namespace <span class="token operator">||</span> <span class="token string">&apos;&apos;</span>
    store<span class="token punctuation">.</span><span class="token function">dispatch</span><span class="token punctuation">(</span>namespace <span class="token operator">+</span> <span class="token string">&apos;pluginAction&apos;</span><span class="token punctuation">)</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
<h3 id="registro-de-m&#xF3;dulo-din&#xE2;mico">Registro de m&#xF3;dulo din&#xE2;mico</h3>
<p>Voc&#xEA; pode registrar um m&#xF3;dulo <strong> ap&#xF3;s </strong> a <em>store</em>  foi criada com o m&#xE9;todo <code>store.registerModule</code>:</p>
<pre class="language-"><code class="lang-js"><span class="token comment" spellcheck="true">// register a module `myModule`</span>
store<span class="token punctuation">.</span><span class="token function">registerModule</span><span class="token punctuation">(</span><span class="token string">&apos;myModule&apos;</span><span class="token punctuation">,</span> <span class="token punctuation">{</span>
  <span class="token comment" spellcheck="true">// ...</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span>

<span class="token comment" spellcheck="true">// register a nested module `nested/myModule`</span>
store<span class="token punctuation">.</span><span class="token function">registerModule</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token string">&apos;nested&apos;</span><span class="token punctuation">,</span> <span class="token string">&apos;myModule&apos;</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">{</span>
  <span class="token comment" spellcheck="true">// ...</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span>
</code></pre>
<p>O estado do m&#xF3;dulo ser&#xE1; exposto como <code>store.state.myModule</code> e<code>store.state.nested.myModule</code>.
O registro de m&#xF3;dulo din&#xE2;mico torna poss&#xED;vel que outros plugins do Vue tamb&#xE9;m alavancem o Vuex para gerenciamento de estado anexando um m&#xF3;dulo &#xE0; <em>store</em>  do aplicativo. Por exemplo, a biblioteca <a href="https://github.com/vuejs/vuex-router-sync" target="_blank"><code>vuex-router-sync</code></a> integra vue-router com vuex, gerenciando o estado da rota do aplicativo em um m&#xF3;dulo anexado dinamicamente.</p>
<p>Voc&#xEA; tamb&#xE9;m pode remover um m&#xF3;dulo registrado dinamicamente com <code>store.unregisterModule (moduleName)</code>. Observe que voc&#xEA; n&#xE3;o pode remover m&#xF3;dulos est&#xE1;ticos (declarados na cria&#xE7;&#xE3;o da <em>store</em> ) com este m&#xE9;todo.
Pode ser prov&#xE1;vel que voc&#xEA; queira preservar o estado anterior ao registrar um novo m&#xF3;dulo, como preservar o estado de um aplicativo Server Side Rendered. Voc&#xEA; pode conseguir isso com a op&#xE7;&#xE3;o <code>preserveState</code>:<code>store.registerModule (&apos;a&apos;, module, {preserveState: true})</code></p>
<h3 id="reutiliza&#xE7;&#xE3;o-do-m&#xF3;dulo">Reutiliza&#xE7;&#xE3;o do M&#xF3;dulo</h3>
<p>&#xC0;s vezes, talvez precisemos criar v&#xE1;rias inst&#xE2;ncias de um m&#xF3;dulo, por exemplo:</p>
<ul>
<li>Criando v&#xE1;rias <em>stores</em>  que usam o mesmo m&#xF3;dulo (por exemplo, para <a href="https://ssr.vuejs.org/en/structure.html#avoid-statelet-singletons" target="_blank">evitar Singletons com informa&#xE7;&#xF5;es de estado no SSR</a> quando a op&#xE7;&#xE3;o <code>runInNewContext</code> &#xE9; <code>false</code> ou <code>&apos;once&apos;</code>);</li>
<li>Registre o mesmo m&#xF3;dulo v&#xE1;rias vezes na mesma <em>store</em> .</li>
</ul>
<p>Se usarmos um objeto simples para declarar o estado do m&#xF3;dulo, esse objeto de estado ser&#xE1; compartilhado por refer&#xEA;ncia e causar&#xE1; polui&#xE7;&#xE3;o do estado do armazenamento / m&#xF3;dulo quando estiver mutado.
Este &#xE9; exatamente o mesmo problema com <code>data</code> dentro dos componentes do Vue. Portanto, a solu&#xE7;&#xE3;o tamb&#xE9;m &#xE9; a mesma - use uma fun&#xE7;&#xE3;o para declarar o estado do m&#xF3;dulo (suportado em 2.3.0+):</p>
<pre class="language-"><code class="lang-js"><span class="token keyword">const</span> MyReusableModule <span class="token operator">=</span> <span class="token punctuation">{</span>
  state <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token keyword">return</span> <span class="token punctuation">{</span>
      foo<span class="token punctuation">:</span> <span class="token string">&apos;bar&apos;</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">}</span><span class="token punctuation">,</span>
  <span class="token comment" spellcheck="true">// muta&#xE7;&#xF5;es, a&#xE7;&#xF5;es, getters...</span>
<span class="token punctuation">}</span>
</code></pre>

                                
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