AngularJS | ng-focus指令 - 芒果文档

📌 相关文章

📜 AngularJS | ng-focus指令

📅 最后修改于: 2021-05-13 18:27:05 🧑 作者: Mango

AngluarJS中的ng-focus指令用于对元素进行聚焦时应用自定义行为。它可以用于显示/隐藏某些元素，也可以在元素被聚焦时弹出警报。它由，，元素支持。</p> <p><strong>句法：</strong> </p> <div class="hcb_wrap"> <pre class="prism line-numbers lang-cpp" data-lang="C++"><code class="replace"><element ng-focus="expression"> Contents... </element></code></pre> </div> <p><strong>表达式</strong>告诉输入集中的位置时要做什么。</p> <p><strong>示例1：</strong>本示例使用ng-focus指令显示文本区域字段。 </p> <div class="hcb_wrap"> <pre class="prism line-numbers lang-cpp" data-lang="C++"><code class="replace"><!DOCTYPE html> <html> <head> <title>ng-focus Directive</title> <script src= "https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"> </script> </head> <body ng-app="" style="text-align:center"> <h1 style="color:green">GeeksforGeeks</h1> <h2>ng-focus Directive</h2> <a href="" ng-focus="isCheck=true"> Click to proceed. </a> <br><br> <div class="row" ng-show="isCheck"> Enter Name: <input type="text" ng-focus="isCheck=true" placeholder="geeksforgeeks" /> </div> </body> </html> </code></pre> </div> <p><strong>输出：</strong><br/><strong>在点击链接之前：</strong> <br/><img alt="ngfocus" class="img-fluid" src="https://mangdo-1254073825.cos.ap-chengdu.myqcloud.com//front_eng_imgs/geeksforgeeks2021/AngularJS%20%7C%20ng-focus%20Directive_0.jpg"/><br/><strong>单击链接后：</strong> <br/><img alt="ngfocus" class="img-fluid" src="https://mangdo-1254073825.cos.ap-chengdu.myqcloud.com//front_eng_imgs/geeksforgeeks2021/AngularJS%20%7C%20ng-focus%20Directive_1.jpg"/></p> <p><strong>示例2：</strong>此示例使用ng-focus指令在输入文本字段上显示焦点。 </p> <div class="hcb_wrap"> <pre class="prism line-numbers lang-cpp" data-lang="C++"><code class="replace"><!DOCTYPE html> <html> <head> <title>ng-focus Directive</title> <script src= "https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"> </script> </head> <body ng-app="app" style="text-align:center;"> <h1 style="color:green">GeeksforGeeks</h1> <h2>ng-focus Directive</h2> <div ng-controller="geek"> Input: <input type="text" ng-focus="focused = true" ng-blur="focused = false" /> <pre ng-show="focused">Input is focused.</pre> </div> <script> var app = angular.module("app", []); app.controller('geek', ['$scope', function ($scope) { }]); </script> </body> </html> </code></pre> </div> <p><strong>输出：</strong><br/><strong>在点击文本区域之前：</strong> <br/><img alt="ngfocus" class="img-fluid" src="https://mangdo-1254073825.cos.ap-chengdu.myqcloud.com//front_eng_imgs/geeksforgeeks2021/AngularJS%20%7C%20ng-focus%20Directive_2.jpg"/><br/><strong>单击文本区域后：</strong> <br/><img alt="ngfocus" class="img-fluid" src="https://mangdo-1254073825.cos.ap-chengdu.myqcloud.com//front_eng_imgs/geeksforgeeks2021/AngularJS%20%7C%20ng-focus%20Directive_3.jpg"/></p> <div class="_ap_apex_ad" id="82d2079a-8120-480f-9fc7-5cda825d56e7"></div> <p></p></div> </div> </div> </div> </div> </div> <footer> <div class="bg-white text-center pb-1"> <p class="text-body-tertiary pt-3 lh-lg text-opacity-50" id="footer-text">Copyright © 2020 - 2024 版权所有 <br> <a href="https://beian.miit.gov.cn/" target="_blank" class="text-opacity-50 text-body-tertiary mt-1 mb-1">蜀ICP备20006366号-1</a> <br> Made with ❤️ in Chengdu </p> </div> </footer>  <script src="https://unpkg.com/bootstrap@5.3.0-alpha1/dist/js/bootstrap.bundle.min.js" crossorigin="anonymous"></script>  <script src="https://cdn.jsdelivr.net/npm/@meilisearch/instant-meilisearch/dist/instant-meilisearch.umd.min.js"></script> <script src="https://cdn.jsdelivr.net/npm/instantsearch.js@4"></script> <script src="https://imangodoc.com/static/javascript/meili_custom.js"></script>  <script src="https://cdn.jsdelivr.net/npm/prismjs@1.29.0/components/prism-core.min.js"></script> <script src="https://cdn.jsdelivr.net/npm/prismjs@1.29.0/plugins/toolbar/prism-toolbar.min.js"></script> <script src="https://cdn.jsdelivr.net/npm/prismjs@1.29.0/plugins/autoloader/prism-autoloader.min.js"></script> <script src="https://cdn.jsdelivr.net/npm/prismjs@1.29.0/plugins/copy-to-clipboard/prism-copy-to-clipboard.min.js"></script> </body> </html>