AngularJS ng-model 指令详解

ngModel 指令是一个非常实用的工具，用于将 HTML 控件（如 input、select 和 textarea）或任何自定义表单控件的值绑定起来。它将所需的用户值存储在一个变量中，方便我们在需要时随时调用。此外，它在表单验证过程中也扮演着重要角色。各种表单输入类型（如 text、checkbox、radio、number、email、URL、date、datetime-local time、month、week）都可以与 ngModel 指令 配合使用。该指令受到 、 和 </a> 标签的支持。<br /> <strong><em><em>语法：</em></strong></em></p> <pre><code> 内容... </code></pre> <p><strong><em><em>示例 1：</em></strong></em> 这个示例描述了 <strong>ng-model 指令</strong>在 AngularJS 中的基本用法。</p> <p>HTML</p> <p><code><br /> CODEBLOCK_88047d7b<br /> </code><br /> <strong><em><em>输出结果：</em></strong></em></p> <p>需要注意的是，为了显示 URL 和 email，我们必须输入有效的 email/URL 格式，它们才会被打印出来。如果使用 <strong>ngmodel</strong> 来打印日期和时间，我们必须填入输入框中的所有字段。单选按钮一旦被选中就无法取消选中，因为在 <strong><em><em>"c"</em></strong></em> 函数中，我们将 choice 的值设置为了 true。</p> <p><strong><em><em>使用 ng-model 指令的 HTML 表单：</em></strong></em> 我们可以通过在 <strong>app.component.html</strong> 文件中编写以下代码，来定义 <strong>ngModel</strong>。</p> <pre><code><div class="form-group"> <label for="phone">手机号</label> <pre>{{ phone.value }}</pre> </div> <p></code><br /> <strong></strong>ngModel 指令<em></em>通过引用而非值来存储变量。这通常发生在将输入绑定到对象（例如 Date）或集合（例如数组）模型时。创建的 phone 对象包含许多用于<a href="https://shluqu.cn/go/?url=https://www.geeksforgeeks.org/angular-js/angularjs-form-validation/" target="_blank" rel="nofollow" >验证</a>目的的字段。以下是用于验证的类列表：</p> <ul> <li><strong><em><em>ng-touched</em></strong></em>：表示该字段已被触碰。</li> <li><strong><em><em>ng-untouched</em></strong></em>：表示该字段尚未被触碰。</li> <li><strong><em><em>ng-valid</em></strong></em>：指定字段内容是有效的。</li> <li><strong><em><em>ng-invalid</em></strong></em>：指定字段内容无效。</li> <li><strong><em><em>ng-dirty</em></strong></em>：表示该字段已被修改。</li> <li><strong><em><em>ng-pristine</em></strong></em>：表示该字段尚未被修改。</li> </ul> <p><strong><em><em>结合 getter 和 setter 绑定 ngModel：</em></strong></em> 每当</p> </div> <footer class="kratos-entry-footer clearfix"> <div class="post-note">声明：本站所有文章，如无特殊说明或标注，均为本站原创发布。任何个人或组织，在未征得本站同意时，禁止复制、盗用、采集、发布本站内容到任何网站、书籍等各类媒体平台。如若本站内容侵犯了原著者的合法权益，可联系我们进行处理。如需转载，请注明文章出处豆丁博客和来源网址。<a 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