Question

我有一个带有div容器的主容器php文件。最初，在加载页面时，div容器默认没有任何内容或html子项。当用户单击导航栏中的导航项时，我使用JQuery将php文件加载到此div容器。

landingpage.php

<?php
require_once 'navbar.php';
?>

<!DOCTYPE html>
<html>
<head>
    <title>Admin | Dashboard</title>
    <link rel="stylesheet" href="css/dashboard_admin.css">
</head>
<body>
<div class="wrapper">
    <!-- CONTENT CONTAINER's content depends on what was clicked on navbar -->
    <div class="container" id="content_container">
        <div class="div_dashboardLabel" id="dashboard_Label">
            <h2 id="label_Dashboard">Admin Dashboard</h2>
        </div>
    </div>
    <!-- END OF CONTENT CONTAINER-->
</div>
<!-- end of wrapper-->

<script src="js/jquery-3.3.1.js"></script>
<script type="text/javascript">
    var user = '<?php echo json_encode($user);?>';
    var role = '<?php echo json_encode($role); ?>';
</script>
<script src="js/landingpage.js"></script>

</body>
</html>

landingpage.js

/* GLOBAL VARIABLES WITHIN THIS DOCUMENT*/
var div_content_container = $("#content_container");
var navitem_dashboard = $("#admin_dashboard");
var navitem_admin_account_management = $("#admin_accountmanagement");

var userObj = JSON.parse(user);
var roleObj = JSON.parse(role);
var logout = $('#logout');
/* END */

$(document).ready(function(){
    loadDashboard(); // dashboard is loaded as default view.
    navitem_admin_account_management.on("click",loadAccountManagement);
});

function loadDashboard() {
    var url_admin_dashboard = 'view/admin_dashboard.php';
    var url_teacher_dashboard = 'view/teacher_dashboard.php';
    var url_student_dashboard = 'view/student_dashboard.php';
    div_content_container.html('');
    if (roleObj.rolename === 'Administrator') {
        div_content_container.load(url_admin_dashboard);
    } else if (roleObj.rolename === 'Teacher') {
        div_content_container.load(url_teacher_dashboard);
    } else if (roleObj.rolename === 'Student') {
        div_content_container.load(url_student_dashboard);
    }
}

function loadAccountManagement(){
    var url = 'view/admin_accountmanagement.php';
    div_content_container.html('');
    div_content_container.load(url);
}

对于前端使用 landingpage.js 的 landingpage.php ，一切正常。没问题。

问题是在admin_accountmanagement.php中加载了 div_content_container 文件。 admin_account_management.php 的JS似乎没有绑定到元素：

function loadAccountManagement(){
    var url = 'view/admin_accountmanagement.php'; // has its JS file
    div_content_container.html('');
    div_content_container.load(url);
}

例如，我们选择url 'view/admin_accountmanagement.php'当用户点击导航栏项帐户管理时，此页面会在div_content_container内加载

，如

<div class="wrapper">
    <!-- CONTENT CONTAINER's content depends on what was clicked on navbar -->
    <div class="container" id="content_container">
        <!-- view/admin_accountmanagement.php loaded here --> 
    </div>
    <!-- END OF CONTENT CONTAINER-->
</div>

显示页面或替换div_content_container中包含的当前元素没有问题。问题是，当 view / admin_accountmanagement.php时，附加到 view / admin_accountmanagement.php 的 JS文件似乎不适用页面已加载到div_content_container

view / admin_accountmanagement.php 已加载，但点击事件绑定到 view / admin_accountmanagement.php 的元素工作。我知道这是因为我试图在alert()
上显示$(document).ready()消息
admin_accountmanagement.php

<body> <div> <button class="button" id="btn_AddUser"> Add New User </button> </div> <script src="js/admin_accountmanagement.js"></script>  </body>

admin_accountmanagement.js

var btn_add_user = $('#btn_AddUser'); $(document).ready(function(){ alert("TEST"); //doesn't work no alert message. btn_add_user.on("click",test); //doesn't work no alert message }); function test(){ alert("testing"); //doesn't work. no alert message }

我只能显示页面，但是当我点击<button id="btn_AddUser">时没有任何反应。

考虑到我将页面加载到div_content_container的方式，我如何解决这个问题？

提前致谢。

Answer 1

将admin_accountmanagement.js更改为

var btn_add_user = $('#btn_AddUser');

alert('Account management js loaded'); // this should show alert

$(document).on("click",btn_add_user,test);

function test(){
    alert("testing"); //doesn't work. no alert message
}

此方法有效，因为绑定不依赖于“文档就绪”，因为第一次加载父页时已经触发了文档就绪

Answer 2

@jordan我同意@Magnus Eriksson，因为最好绑定它on('event','selector','function')，但在.off()播放.on()内容时使用dynamic这可能导致{b>多个绑定function。如果您仍无法使绑定事件发挥作用，您可以尝试在加载内容之后在页面的头部注入.js文件，例如：$('head').append('<script src="admin_accountmanagement.js"></script>')。使用load()中的js功能绑定click event。

或者，您使用以下代码段：

function LoadContent()
{
 var url = 'view/admin_accountmanagement.php';
 var jssrc = 'js/admin_accountmanagement.js';
 div_content_container.html('');
 div_content_container.load(url);  
 if($('head').find('*[src="'+jssrc+'"]').length==0)
   {
   //the below approach have some consequences related to it as you will not be able to see the injected js in your developers tool's Sources(in chrome). 
   $('head').append('<script src="'+jssrc+'"></script>');
   }
}

然后在.js上看起来像这样：

var btn_add_user = null;
$(window).load(function(){
  alert("TEST"); 
  btn_add_user = $('#btn_AddUser');
  btn_add_user.off('click').on("click",test); //use .off('event') if load() is being called multiple times.
});

function test(){
   alert("testing"); 
}

使用JQuery的load（file.php）方法时，不会加载所选php文件的Javascript

2 个答案: