vuex-help

<!DOCTYPE HTML> <html lang="ru" > <head> <meta charset="UTF-8"> <meta content="text/html; charset=utf-8" http-equiv="Content-Type"> <title>Обработка форм · Vuex</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta name="description" content=""> <meta name="generator" content="GitBook 3.2.3"> <link rel="stylesheet" href="../gitbook/style.css"> <link rel="stylesheet" href="../gitbook/gitbook-plugin-prism/prism.css"> <link rel="stylesheet" href="../gitbook/gitbook-plugin-search/search.css"> <link rel="stylesheet" href="../gitbook/gitbook-plugin-theme-vuejs/vue.css"> <meta name="HandheldFriendly" content="true"/> <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no"> <meta name="apple-mobile-web-app-capable" content="yes"> <meta name="apple-mobile-web-app-status-bar-style" content="black"> <link rel="apple-touch-icon-precomposed" sizes="152x152" href="../gitbook/images/apple-touch-icon-precomposed-152.png"> <link rel="shortcut icon" href="../gitbook/images/favicon.ico" type="image/x-icon"> <link rel="next" href="testing.html" /> <link rel="prev" href="strict.html" /> </head> <body> <div class="book"> <div class="book-summary"> <div id="book-search-input" role="search"> <input type="text" placeholder="Введите условия поиска" /> </div> <nav role="navigation"> <script async type="text/javascript" src="//cdn.carbonads.com/carbon.js?zoneid=1673&serve=C6AILKT&placement=vuejs" id="_carbonads_js"></script> <ul class="summary"> <li class="chapter " data-level="1.1" data-path="./"> <a href="./"> Introduction </a> </li> <li class="chapter " data-level="1.2" > <a target="_blank" href="https://github.com/vuejs/vuex/releases"> История изменений </a> </li> <li class="chapter " data-level="1.3" data-path="installation.html"> <a href="installation.html"> Установка </a> </li> <li class="chapter " data-level="1.4" data-path="intro.html"> <a href="intro.html"> Что такое Vuex? </a> </li> <li class="chapter " data-level="1.5" data-path="getting-started.html"> <a href="getting-started.html"> Начало работы </a> </li> <li class="chapter " data-level="1.6" data-path="core-concepts.html"> <a href="core-concepts.html"> Основные понятия </a> <ul class="articles"> <li class="chapter " data-level="1.6.1" data-path="state.html"> <a href="state.html"> Состояние </a> </li> <li class="chapter " data-level="1.6.2" data-path="getters.html"> <a href="getters.html"> Геттеры </a> </li> <li class="chapter " data-level="1.6.3" data-path="mutations.html"> <a href="mutations.html"> Мутации </a> </li> <li class="chapter " data-level="1.6.4" data-path="actions.html"> <a href="actions.html"> Действия </a> </li> <li class="chapter " data-level="1.6.5" data-path="modules.html"> <a href="modules.html"> Модули </a> </li> </ul> </li> <li class="chapter " data-level="1.7" data-path="structure.html"> <a href="structure.html"> Структура приложения </a> </li> <li class="chapter " data-level="1.8" data-path="plugins.html"> <a href="plugins.html"> Плагины </a> </li> <li class="chapter " data-level="1.9" data-path="strict.html"> <a href="strict.html"> Строгий режим (strict mode) </a> </li> <li class="chapter active" data-level="1.10" data-path="forms.html"> <a href="forms.html"> Обработка форм </a> </li> <li class="chapter " data-level="1.11" data-path="testing.html"> <a href="testing.html"> Тестирование </a> </li> <li class="chapter " data-level="1.12" data-path="hot-reload.html"> <a href="hot-reload.html"> Горячая замена </a> </li> <li class="chapter " data-level="1.13" data-path="api.html"> <a href="api.html"> Справочник API </a> </li> <li class="divider"></li> <li> <a href="https://www.gitbook.com" target="blank" class="gitbook-link"> Опубликовано с помощью GitBook </a> </li> </ul> </nav> </div> <div class="book-body"> <div class="body-inner"> <div class="book-header" role="navigation">  <h1> <i class="fa fa-circle-o-notch fa-spin"></i> <a href="." >Обработка форм</a> </h1> </div> <div class="page-wrapper" tabindex="-1" role="main"> <div class="page-inner"> <div id="book-search-results"> <div class="search-noresults"> <section class="normal markdown-section"> <h1 id="обработка-форм">Обработка форм</h1> <p>Если вы используете Vuex в strict mode, привязать <code>v-model</code> к состоянию, хранимому во Vue, может быть немного непросто:</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>Предположим, что <code>obj</code> — это вычисляемое свойство, возвращающее ссылку на объект из хранилища. В таком случае, <code>v-model</code> будет пытаться напрямую изменить значение <code>obj.message</code> в ответ на действия пользователя. В strict mode это спровоцирует ошибку, поскольку это изменение происходит вне обработчика мутации Vuex.</p> <p>Чтобы подружить Vuex с такой ситуацией, следует однонаправленно связать атрибут <code>value</code> элемента <code><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>input</span><span class="token punctuation">></span></span></code> с полем объекта, а для учёта изменений использовать событие <code>change</code>:</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>А вот и обработчик мутаций:</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="двухсторонние-вычисляемые-свойства">Двухсторонние вычисляемые свойства</h3> <p>Заметно, что получившаяся выше запись — куда многословнее, чем используемая в связке <code>v-model</code> с локальным состоянием, да и некоторые полезные возможности <code>v-model</code> мы таким образом упускаем. В качестве альтернативы можно предложить использование двунаправленного вычисляемого свойства с сеттером:</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> </section> </div> <div class="search-results"> <div class="has-results"> <h1 class="search-results-title"><span class='search-results-count'></span> results matching "<span class='search-query'></span>"</h1> <ul class="search-results-list"></ul> </div> <div class="no-results"> <h1 class="search-results-title">No results matching "<span class='search-query'></span>"</h1> </div> </div> </div> </div> </div> <script src="//m.servedby-buysellads.com/monetization.js" type="text/javascript"></script> <div class="bsa-cpc"></div> <script> (function(){ if(typeof _bsa !== 'undefined' && _bsa) { _bsa.init('default', 'CKYD62QM', 'placement:vuejsorg', { target: '.bsa-cpc', align: 'horizontal', disable_css: 'true' }); } })(); </script> </div> <a href="strict.html" class="navigation navigation-prev " aria-label="Previous page: Строгий режим (strict mode)"> <i class="fa fa-angle-left"></i> </a> <a href="testing.html" class="navigation navigation-next " aria-label="Next page: Тестирование"> <i class="fa fa-angle-right"></i> </a> </div> <script> var gitbook = gitbook || []; gitbook.push(function() { gitbook.page.hasChanged({"page":{"title":"Обработка форм","level":"1.10","depth":1,"next":{"title":"Тестирование","level":"1.11","depth":1,"path":"testing.md","ref":"testing.md","articles":[]},"previous":{"title":"Строгий режим (strict mode)","level":"1.9","depth":1,"path":"strict.md","ref":"strict.md","articles":[]},"dir":"ltr"},"config":{"plugins":["edit-link","prism","theme-vuejs@git+https://github.com/pearofducks/gitbook-plugin-theme-vuejs.git","-fontsettings","-highlight","github"],"styles":{"website":"styles/website.css","pdf":"styles/pdf.css","epub":"styles/epub.css","mobi":"styles/mobi.css","ebook":"styles/ebook.css","print":"styles/print.css"},"pluginsConfig":{"prism":{},"github":{"url":"https://github.com/vuejs/vuex/"},"livereload":{},"search":{},"theme-vuejs":{},"lunr":{"maxIndexSize":1000000,"ignoreSpecialCharacters":false},"sharing":{"facebook":false,"twitter":false,"google":false,"weibo":false,"instapaper":false,"vk":false,"all":["facebook","google","twitter","weibo","instapaper"]},"edit-link":{"label":"Редактировать эту страницу","base":"https://github.com/vuejs/vuex/tree/dev/docs"},"theme-default":{"styles":{"website":"styles/website.css","pdf":"styles/pdf.css","epub":"styles/epub.css","mobi":"styles/mobi.css","ebook":"styles/ebook.css","print":"styles/print.css"},"showLevel":false}},"theme":"default","pdf":{"pageNumbers":true,"fontSize":12,"fontFamily":"Arial","paperSize":"a4","chapterMark":"pagebreak","pageBreaksBefore":"/","margin":{"right":62,"left":62,"top":56,"bottom":56}},"structure":{"langs":"LANGS.md","readme":"README.md","glossary":"GLOSSARY.md","summary":"SUMMARY.md"},"variables":{},"title":"Vuex","language":"ru","links":{"sharing":{"facebook":false,"twitter":false}},"gitbook":">3.0.0"},"file":{"path":"forms.md","mtime":"2018-02-17T07:20:49.000Z","type":"markdown"},"gitbook":{"version":"3.2.3","time":"2018-03-02T20:43:43.208Z"},"basePath":".","book":{"language":"ru"}}); }); </script> </div> <script src="../gitbook/gitbook.js"></script> <script src="../gitbook/theme.js"></script> <script src="../gitbook/gitbook-plugin-edit-link/plugin.js"></script> <script src="../gitbook/gitbook-plugin-github/plugin.js"></script> <script src="../gitbook/gitbook-plugin-livereload/plugin.js"></script> <script src="../gitbook/gitbook-plugin-search/search-engine.js"></script> <script src="../gitbook/gitbook-plugin-search/search.js"></script> <script src="../gitbook/gitbook-plugin-lunr/lunr.min.js"></script> <script src="../gitbook/gitbook-plugin-lunr/search-lunr.js"></script> <script src="../gitbook/gitbook-plugin-sharing/buttons.js"></script> </body> </html>