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a utilies library reduce boilerplate for vuex
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폼 핸들링
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<a href="." >폼 핸들링</a>
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<h1 id="폼-핸들링">폼 핸들링</h1>
<p>strict 모드로 Vuex를 사용하는 경우 Vuex에 포함된 부분에 <code>v-model</code>을 사용하는 것은 약간 까다로울 수 있습니다.</p>
<pre class="language-"><code class="lang-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>input</span> <span class="token attr-name">v-model</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>obj.message<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>
</code></pre>
<p><code>obj</code>가 저장소에서 객체를 반환하는 계산된 속성이라면, 여기에있는 <code>v-model</code>은 사용자가 입력 할 때 <code>obj.message</code>를 직접 변경하려고 합니다. strict 모드에서는 Vuex 변이 처리기 내부에서 변이가 수행되지 않으므로 오류가 발생합니다.</p>
<p>그것을 다루는 "Vuex 방식"은 <code><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>input</span><span class="token punctuation">></span></span></code>의 값을 바인딩하고 <code>input</code> 또는 <code>change</code> 이벤트에 대한 액션을 호출하는 것 입니다.</p>
<pre class="language-"><code class="lang-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>input</span> <span class="token attr-name">:value</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>message<span class="token punctuation">"</span></span> <span class="token attr-name">@input</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>updateMessage<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>
</code></pre>
<pre class="language-"><code class="lang-js"><span class="token comment" spellcheck="true">// ...</span>
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>
message<span class="token punctuation">:</span> state <span class="token operator">=</span><span class="token operator">></span> state<span class="token punctuation">.</span>obj<span class="token punctuation">.</span>message
<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>
updateMessage <span class="token punctuation">(</span>e<span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>$store<span class="token punctuation">.</span><span class="token function">commit</span><span class="token punctuation">(</span><span class="token string">'updateMessage'</span><span class="token punctuation">,</span> e<span class="token punctuation">.</span>target<span class="token punctuation">.</span>value<span class="token punctuation">)</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
<p>변이에 대한 핸들러 입니다.</p>
<pre class="language-"><code class="lang-js"><span class="token comment" spellcheck="true">// ...</span>
mutations<span class="token punctuation">:</span> <span class="token punctuation">{</span>
updateMessage <span class="token punctuation">(</span>state<span class="token punctuation">,</span> message<span class="token punctuation">)</span> <span class="token punctuation">{</span>
state<span class="token punctuation">.</span>obj<span class="token punctuation">.</span>message <span class="token operator">=</span> message
<span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
<h3 id="양방향-계산된-속성">양방향 계산된 속성</h3>
<p>틀림없이, 위의 내용은 <code>v-model</code> + 지역 상태보다 좀더 장황 해졌고, <code>v-model</code>의 유용한 기능 중 일부를 잃어 버렸습니다. 다른 방법은 setter를 사용하여 양방향 계산된 속성을 사용하는 것입니다.</p>
<pre class="language-"><code class="lang-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>input</span> <span class="token attr-name">v-model</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>message<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>
</code></pre>
<pre class="language-"><code class="lang-js"><span class="token comment" spellcheck="true">// ...</span>
computed<span class="token punctuation">:</span> <span class="token punctuation">{</span>
message<span class="token punctuation">:</span> <span class="token punctuation">{</span>
<span class="token keyword">get</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">this</span><span class="token punctuation">.</span>$store<span class="token punctuation">.</span>state<span class="token punctuation">.</span>obj<span class="token punctuation">.</span>message
<span class="token punctuation">}</span><span class="token punctuation">,</span>
<span class="token keyword">set</span> <span class="token punctuation">(</span>value<span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>$store<span class="token punctuation">.</span><span class="token function">commit</span><span class="token punctuation">(</span><span class="token string">'updateMessage'</span><span class="token punctuation">,</span> value<span class="token punctuation">)</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
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