在 Vue.js 中使用 v-model 轻松绑定表单输入

Vue.js 是一个流行的 JavaScript 框架，它以简化 web 开发而闻名，特别是通过它的数据绑定功能。v-model 指令是 Vue.js 中一个强大的工具，它允许你轻松地将表单输入绑定到 Vue 实例中的数据属性。在这篇文章中，我们将深入了解如何使用 v-model 指令绑定表单 、 和 <select> 元素。</p> <p><strong>理解 v-model</strong></p> <p>v-model 指令本质上是一个语法糖，它将以下三个特性组合在一起：</p> <ul> <li><code>v-bind:value</code>：它设置表单控件的初始值。</li> <li><code>v-on:input</code>：它侦听表单控件的输入事件，并更新 Vue 实例中的数据属性。</li> <li><code>v-on:change</code>：它侦听表单控件的变化事件，并更新 Vue 实例中的数据属性。</li> </ul> <p><strong>绑定 <input> 元素</strong></p> <p>对于 <input> 元素，v-model 指令会根据 <code>type</code> 属性自动选择适当的绑定方式。例如：</p> <ul> <li><strong>text、email、password</strong> ：绑定输入框的值。</li> <li><strong>checkbox</strong> ：绑定一个布尔值，表示复选框是否选中。</li> <li><strong>radio</strong> ：绑定一个字符串值，表示选中哪个单选按钮。</li> </ul> <pre><code class="hljs"><input <span class="hljs-attribute">type</span>=<span class="hljs-string">"text"</span> <span class="hljs-attribute">v-model</span>=<span class="hljs-string">"username"</span>> </code></pre> <p><strong>绑定 <textarea> 元素</strong></p> <p>对于 <textarea> 元素，v-model 指令会绑定文本区域的值：</p> <pre><code class="hljs"><span class="hljs-tag"><<span class="hljs-name">textarea</span> <span class="hljs-attr">v-model</span>=<span class="hljs-string">"message"</span>></span><span class="hljs-tag"></<span class="hljs-name">textarea</span>></span> </code></pre> <p><strong>绑定 <select> 元素</strong></p> <p>对于 <select> 元素，v-model 指令会绑定选定选项的值：</p> <pre><code class="hljs"><span class="hljs-tag"><<span class="hljs-name">select</span> <span class="hljs-attr">v-model</span>=<span class="hljs-string">"selectedFruit"</span>></span> <span class="hljs-tag"><<span class="hljs-name">option</span> <span class="hljs-attr">value</span>=<span class="hljs-string">"apple"</span>></span>苹果<span class="hljs-tag"></<span class="hljs-name">option</span>></span> <span class="hljs-tag"><<span class="hljs-name">option</span> <span class="hljs-attr">value</span>=<span class="hljs-string">"orange"</span>></span>橘子<span class="hljs-tag"></<span class="hljs-name">option</span>></span> <span class="hljs-tag"><<span class="hljs-name">option</span> <span class="hljs-attr">value</span>=<span class="hljs-string">"banana"</span>></span>香蕉<span class="hljs-tag"></<span class="hljs-name">option</span>></span> <span class="hljs-tag"></<span class="hljs-name">select</span>></span> </code></pre> <p><strong>表单验证</strong></p> <p>v-model 指令还可以帮助你处理表单验证。你可以使用 <code>v-validate</code> 修饰符来指定表单验证规则：</p> <pre><code class="hljs"><<span class="hljs-keyword">input</span> <span class="hljs-keyword">type</span>="text" v-model="username" v-<span class="hljs-keyword">validate</span>:required> </code></pre> <p>这将为 <code>username</code> 属性添加一个必需验证规则。</p> <p><strong>总结</strong></p> <p>v-model 指令是 Vue.js 中一个强大的工具，它允许你轻松地绑定表单输入。它自动选择适当的绑定方式，并支持表单验证。通过理解如何使用 v-model 指令，你可以创建更直观、更易于维护的 Vue.js 表单。</p> </div></div><ins class="adsbygoogle adsbygoogle mb-[20px] md:mb-[15px]" style="display:block;" data-ad-client="ca-pub-9777110919590837" data-ad-slot="3142630786" data-ad-format="auto" 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入门：从零开始到构建复杂应用程序","g4OsKt9u",{"title":53,"urlName":54},"揭秘内网穿透：解锁网站公网访问新姿势","SoEVQGv5",{"title":56,"urlName":57},"实用！全能前端必备Linux命令学习指南","_l1CSNaT",{"title":59,"urlName":60},"Stable Diffusion XL webui Linux 服务器部署：终极指南","fahnoYGs","{\n \"@context\": \"https://schema.org\",\n \"@type\": \"NewsArticle\",\n \"image\": [\"https://oss.bolzjb.com/2024/02/18/7083ef7c42fd25742f458e0f5f962ed8.image\"],\n \"headline\": \"在 Vue.js 中使用 v-model 轻松绑定表单输入\",\n \"datePublished\": \"2023-11-17T02:41:09+8:00\",\n \"dateModified\": \"2024-02-29T00:40:15+8:00\",\n \"author\": [{\n \"@type\": \"Person\",\n \"name\": \"Kyle\",\n \"url\": \"https://www.bytezonex.com\"\n }]\n }",{"urlName":63,"title":64,"categoryId":12,"categoryTitle":13,"keywords":65,"description":66,"coverImg":67,"content":68,"createdAt":69,"viewCount":70,"updatedAt":71,"datePublished":72,"dateModified":73},"HpSVtioe","在 Vue.js 中使用 v-model 轻松绑定表单输入","Vue.js 表单绑定, v-model, 表单输入, 表单控件, 表单验证","本文提供了 Vue.js 中使用 v-model 指令实现表单输入绑定的全面指南。涵盖了各种表单控件的绑定方式，以及如何在 Vue.js 中有效处理表单验证。","https://oss.bolzjb.com/2024/02/18/7083ef7c42fd25742f458e0f5f962ed8.image","\u003Cp>Vue.js 是一个流行的 JavaScript 框架，它以简化 web 开发而闻名，特别是通过它的数据绑定功能。v-model 指令是 Vue.js 中一个强大的工具，它允许你轻松地将表单输入绑定到 Vue 实例中的数据属性。在这篇文章中，我们将深入了解如何使用 v-model 指令绑定表单 \u003Cinput>、\u003Ctextarea> 和 \u003Cselect> 元素。\u003C/p>\n\u003Cp>\u003Cstrong>理解 v-model\u003C/strong>\u003C/p>\n\u003Cp>v-model 指令本质上是一个语法糖，它将以下三个特性组合在一起：\u003C/p>\n\u003Cul>\n\u003Cli>\u003Ccode>v-bind:value\u003C/code>：它设置表单控件的初始值。\u003C/li>\n\u003Cli>\u003Ccode>v-on:input\u003C/code>：它侦听表单控件的输入事件，并更新 Vue 实例中的数据属性。\u003C/li>\n\u003Cli>\u003Ccode>v-on:change\u003C/code>：它侦听表单控件的变化事件，并更新 Vue 实例中的数据属性。\u003C/li>\n\u003C/ul>\n\u003Cp>\u003Cstrong>绑定 \u003Cinput> 元素\u003C/strong>\u003C/p>\n\u003Cp>对于 \u003Cinput> 元素，v-model 指令会根据 \u003Ccode>type\u003C/code> 属性自动选择适当的绑定方式。例如：\u003C/p>\n\u003Cul>\n\u003Cli>\u003Cstrong>text、email、password\u003C/strong> ：绑定输入框的值。\u003C/li>\n\u003Cli>\u003Cstrong>checkbox\u003C/strong> ：绑定一个布尔值，表示复选框是否选中。\u003C/li>\n\u003Cli>\u003Cstrong>radio\u003C/strong> ：绑定一个字符串值，表示选中哪个单选按钮。\u003C/li>\n\u003C/ul>\n\u003Cpre>\u003Ccode class=\"hljs\"><input \u003Cspan class=\"hljs-attribute\">type\u003C/span>=\u003Cspan class=\"hljs-string\">"text"\u003C/span> \u003Cspan class=\"hljs-attribute\">v-model\u003C/span>=\u003Cspan class=\"hljs-string\">"username"\u003C/span>>\n\u003C/code>\u003C/pre>\n\u003Cp>\u003Cstrong>绑定 \u003Ctextarea> 元素\u003C/strong>\u003C/p>\n\u003Cp>对于 \u003Ctextarea> 元素，v-model 指令会绑定文本区域的值：\u003C/p>\n\u003Cpre>\u003Ccode class=\"hljs\">\u003Cspan class=\"hljs-tag\"><\u003Cspan class=\"hljs-name\">textarea\u003C/span> \u003Cspan class=\"hljs-attr\">v-model\u003C/span>=\u003Cspan class=\"hljs-string\">"message"\u003C/span>>\u003C/span>\u003Cspan class=\"hljs-tag\"></\u003Cspan class=\"hljs-name\">textarea\u003C/span>>\u003C/span>\n\u003C/code>\u003C/pre>\n\u003Cp>\u003Cstrong>绑定 \u003Cselect> 元素\u003C/strong>\u003C/p>\n\u003Cp>对于 \u003Cselect> 元素，v-model 指令会绑定选定选项的值：\u003C/p>\n\u003Cpre>\u003Ccode class=\"hljs\">\u003Cspan class=\"hljs-tag\"><\u003Cspan class=\"hljs-name\">select\u003C/span> \u003Cspan class=\"hljs-attr\">v-model\u003C/span>=\u003Cspan class=\"hljs-string\">"selectedFruit"\u003C/span>>\u003C/span>\n \u003Cspan class=\"hljs-tag\"><\u003Cspan class=\"hljs-name\">option\u003C/span> \u003Cspan class=\"hljs-attr\">value\u003C/span>=\u003Cspan class=\"hljs-string\">"apple"\u003C/span>>\u003C/span>苹果\u003Cspan class=\"hljs-tag\"></\u003Cspan class=\"hljs-name\">option\u003C/span>>\u003C/span>\n \u003Cspan class=\"hljs-tag\"><\u003Cspan class=\"hljs-name\">option\u003C/span> \u003Cspan class=\"hljs-attr\">value\u003C/span>=\u003Cspan class=\"hljs-string\">"orange"\u003C/span>>\u003C/span>橘子\u003Cspan class=\"hljs-tag\"></\u003Cspan class=\"hljs-name\">option\u003C/span>>\u003C/span>\n \u003Cspan class=\"hljs-tag\"><\u003Cspan class=\"hljs-name\">option\u003C/span> \u003Cspan class=\"hljs-attr\">value\u003C/span>=\u003Cspan class=\"hljs-string\">"banana"\u003C/span>>\u003C/span>香蕉\u003Cspan class=\"hljs-tag\"></\u003Cspan class=\"hljs-name\">option\u003C/span>>\u003C/span>\n\u003Cspan class=\"hljs-tag\"></\u003Cspan class=\"hljs-name\">select\u003C/span>>\u003C/span>\n\u003C/code>\u003C/pre>\n\u003Cp>\u003Cstrong>表单验证\u003C/strong>\u003C/p>\n\u003Cp>v-model 指令还可以帮助你处理表单验证。你可以使用 \u003Ccode>v-validate\u003C/code> 修饰符来指定表单验证规则：\u003C/p>\n\u003Cpre>\u003Ccode class=\"hljs\"><\u003Cspan class=\"hljs-keyword\">input\u003C/span> \u003Cspan class=\"hljs-keyword\">type\u003C/span>="text" v-model="username" v-\u003Cspan class=\"hljs-keyword\">validate\u003C/span>:required>\n\u003C/code>\u003C/pre>\n\u003Cp>这将为 \u003Ccode>username\u003C/code> 属性添加一个必需验证规则。\u003C/p>\n\u003Cp>\u003Cstrong>总结\u003C/strong>\u003C/p>\n\u003Cp>v-model 指令是 Vue.js 中一个强大的工具，它允许你轻松地绑定表单输入。它自动选择适当的绑定方式，并支持表单验证。通过理解如何使用 v-model 指令，你可以创建更直观、更易于维护的 Vue.js 表单。\u003C/p>\n","2023-11-17 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