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How to use value in vue

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May 09, 2024 pm 04:03 PM

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The value attribute in Vue.js is used for two-way data binding, synchronizing values in components and data models. It is commonly found in input controls such as input boxes, drop-down lists, and text fields, allowing users to interact and update data. Additionally, it can also be used to display data, for example in labels. The value attribute also plays a role in subcomponent event data delivery, custom event listening, and controlling component state.

How to use value in vue

##Usage of the value attribute in Vue.js

The value purpose of the attribute

value attribute is a two-way binding attribute that allows the component to synchronize with the data model. This means that the component's value property will reflect the corresponding value in the data model, and the value in the data model will be updated based on the component's value property.

For input controls

value properties are most commonly used for input controls (such as , <code>), which allows the user to interact with the component and provide input. For example: </code><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'><input type="text" v-model="name"></pre><div class="contentsignin">Copy after login</div></div></p>In this example, the <p>value<code> attribute of the input box is bound to the </code>name<code> data attribute. As the user types into the input box, the </code>name<code> data attribute is updated accordingly, and vice versa. </code></p><p>Used to display data<strong></strong></p><p>value<code> Attributes can also be used to display data, most commonly found in </code><span><code> and </code><p><code> and other tags. For example: </code><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'><span v-text="message">这是一条消息</span></pre><div class="contentsignin">Copy after login</div></div></p>In this case, the value of the <p>message<code> data attribute will be displayed in the </code><span><code> tag. When the </code>message<code> data attribute updates, the text in </code><span><code> also updates. </code></p> <p>Other usage<strong></strong></p>In addition to these common usages, the <p>value<code> attribute can also be used to:</code></p> <ul>Receive sub- Event data passed by the component<li>Listen to custom events and set property values<li>Control the internal state of the component<li> </ul> <p>Key points<strong></strong></p> <ul> <li>value<code> Attributes allow two-way binding of components to the data model. </code> </li>It is used to synchronize data between input controls and components. <li> can also be used to display data. <li>Has a wide range of uses, including passing event data and controlling component state. <li> </ul><p>The above is the detailed content of How to use value in vue. 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Its configuration options include immediate, which specifies whether to execute a callback immediately, and deep, which specifies whether to recursively listen to changes to objects or arrays.</p> </div> <div class="phphistorical_Version2_mids"> <a href="https://www.php.cn/faq/1796792400.html" title="How to return to previous page by vue" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/202406/17/2024061719374214385.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="How to return to previous page by vue" /> </a> <a href="https://www.php.cn/faq/1796792400.html" title="How to return to previous page by vue" class="phphistorical_Version2_mids_title">How to return to previous page by vue</a> <span class="Articlelist_txts_time">Apr 07, 2025 pm 11:30 PM</span> <p class="Articlelist_txts_p">Vue.js has four methods to return to the previous page: $router.go(-1)$router.back() uses <router-link to="/" component window.history.back(), and the method selection depends on the scene.</p> </div> <div class="phphistorical_Version2_mids"> <a href="https://www.php.cn/faq/1796792409.html" title="What does vue multi-page development mean?" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/202406/12/2024061219152673460.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="What does vue multi-page development mean?" /> </a> <a href="https://www.php.cn/faq/1796792409.html" title="What does vue multi-page development mean?" class="phphistorical_Version2_mids_title">What does vue multi-page development mean?</a> <span class="Articlelist_txts_time">Apr 07, 2025 pm 11:57 PM</span> <p class="Articlelist_txts_p">Vue multi-page development is a way to build applications using the Vue.js framework, where the application is divided into separate pages: Code Maintenance: Splitting the application into multiple pages can make the code easier to manage and maintain. Modularity: Each page can be used as a separate module for easy reuse and replacement. Simple routing: Navigation between pages can be managed through simple routing configuration. SEO Optimization: Each page has its own URL, which helps SEO.</p> </div> <div class="phphistorical_Version2_mids"> <a href="https://www.php.cn/faq/1796792398.html" title="How to query the version of vue" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/202406/25/2024062503495943222.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="How to query the version of vue" /> </a> <a href="https://www.php.cn/faq/1796792398.html" title="How to query the version of vue" class="phphistorical_Version2_mids_title">How to query the version of vue</a> <span class="Articlelist_txts_time">Apr 07, 2025 pm 11:24 PM</span> <p class="Articlelist_txts_p">You can query the Vue version by using Vue Devtools to view the Vue tab in the browser's console. Use npm to run the "npm list -g vue" command. Find the Vue item in the "dependencies" object of the package.json file. For Vue CLI projects, run the "vue --version" command. Check the version information in the <script> tag in the HTML file that refers to the Vue file.</p> </div> <div class="phphistorical_Version2_mids"> <a href="https://www.php.cn/faq/1796792630.html" title="How to jump to the div of vue" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/202405/27/2024052703453333218.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="How to jump to the div of vue" /> </a> <a href="https://www.php.cn/faq/1796792630.html" title="How to jump to the div of vue" class="phphistorical_Version2_mids_title">How to jump to the div of vue</a> <span class="Articlelist_txts_time">Apr 08, 2025 am 09:18 AM</span> <p class="Articlelist_txts_p">There are two ways to jump div elements in Vue: use Vue Router and add router-link component. Add the @click event listener and call this.$router.push() method to jump.</p> </div> </div> <a href="https://www.php.cn/web-designer.html" class="phpgenera_Details_mainL4_botton"> <span>See all articles</span> <img src="/static/imghw/down_right.png" alt="" /> </a> </div> </div> </div> </main> <footer> <div class="footer"> <div class="footertop"> <img src="/static/imghw/logo.png" alt=""> <p>Public welfare online PHP training，Help PHP learners grow quickly！</p> </div> <div class="footermid"> <a href="https://www.php.cn/about/us.html">About us</a> <a href="https://www.php.cn/about/disclaimer.html">Disclaimer</a> <a href="https://www.php.cn/update/article_0_1.html">Sitemap</a> </div> <div class="footerbottom"> <p> © php.cn All rights reserved </p> </div> </div> </footer> <input type="hidden" id="verifycode" value="/captcha.html"> <script>layui.use(['element', 'carousel'], function () {var element = layui.element;$ = layui.jquery;var carousel = layui.carousel;carousel.render({elem: '#test1', width: '100%', height: '330px', arrow: 'always'});$.getScript('/static/js/jquery.lazyload.min.js', function () {$("img").lazyload({placeholder: "/static/images/load.jpg", effect: "fadeIn", threshold: 200, skip_invisible: false});});});</script> <script src="/static/js/common_new.js"></script> <script type="text/javascript" src="/static/js/jquery.cookie.js?1744849848"></script> <script src="https://vdse.bdstatic.com//search-video.v1.min.js"></script> <link rel='stylesheet' id='_main-css' href='/static/css/viewer.min.css?2' type='text/css' media='all' /> <script type='text/javascript' src='/static/js/viewer.min.js?1'></script> <script type='text/javascript' src='/static/js/jquery-viewer.min.js'></script> <script type="text/javascript" src="/static/js/global.min.js?5.5.53"></script> <script> var _paq = window._paq = window._paq || []; /* tracker methods like "setCustomDimension" should be called before "trackPageView" */ _paq.push(['trackPageView']); _paq.push(['enableLinkTracking']); (function () { var u = "https://tongji.php.cn/"; _paq.push(['setTrackerUrl', u + 'matomo.php']); _paq.push(['setSiteId', '9']); var d = document, g = d.createElement('script'), s = d.getElementsByTagName('script')[0]; g.async = true; g.src = u + 'matomo.js'; s.parentNode.insertBefore(g, s); })(); </script> <script> // top layui.use(function () { var util = layui.util; util.fixbar({ on: { mouseenter: function (type) { layer.tips(type, this, { tips: 4, fixed: true, }); }, mouseleave: function (type) { layer.closeAll("tips"); }, }, }); }); document.addEventListener("DOMContentLoaded", (event) => { // 定义一个函数来处理滚动链接的点击事件 function setupScrollLink(scrollLinkId, targetElementId) { const scrollLink = document.getElementById(scrollLinkId); const targetElement = document.getElementById(targetElementId); if (scrollLink && targetElement) { scrollLink.addEventListener("click", (e) => { e.preventDefault(); // 阻止默认链接行为 targetElement.scrollIntoView({ behavior: "smooth" }); // 平滑滚动到目标元素 }); } else { console.warn( `Either scroll link with ID '${scrollLinkId}' or target element with ID '${targetElementId}' not found.` ); } } // 使用该函数设置多个滚动链接 setupScrollLink("Article_Details_main1L2s_1", "article_main_title1"); setupScrollLink("Article_Details_main1L2s_2", "article_main_title2"); setupScrollLink("Article_Details_main1L2s_3", "article_main_title3"); setupScrollLink("Article_Details_main1L2s_4", "article_main_title4"); setupScrollLink("Article_Details_main1L2s_5", "article_main_title5"); setupScrollLink("Article_Details_main1L2s_6", "article_main_title6"); // 可以继续添加更多的滚动链接设置 }); window.addEventListener("scroll", function () { var fixedElement = document.getElementById("Article_Details_main1Lmain"); var scrollTop = window.scrollY || document.documentElement.scrollTop; // 兼容不同浏览器 var clientHeight = window.innerHeight || document.documentElement.clientHeight; // 视口高度 var scrollHeight = document.documentElement.scrollHeight; // 页面总高度 // 计算距离底部的距离 var distanceToBottom = scrollHeight - scrollTop - clientHeight; // 当距离底部小于或等于300px时，取消固定定位 if (distanceToBottom <= 980) { fixedElement.classList.remove("Article_Details_main1Lmain"); fixedElement.classList.add("Article_Details_main1Lmain_relative"); } else { // 否则，保持固定定位 fixedElement.classList.remove("Article_Details_main1Lmain_relative"); fixedElement.classList.add("Article_Details_main1Lmain"); } }); </script> </body> </html>