我正试图将这段代码划分到单独的文件中

我在代码编写器中尝试了这些代码。
这段代码运行时，这一切都在一起，但当我分开这些，我创建了一个css文件和一个js文件，然后给他们一个链接来加载css和js文件，然后这段代码不运行，怎么能分离它的js和css?

要在编码器中加载我的css，我写以下代码

<?= link_tag('style.css'); ?>

要在编码器中加载我的js文件，我写以下代码

 <script type="" src="<?= base_url(''); ?>">

<!DOCTYPE html>
<html>
<head>
<style>
#myImg {
    border-radius: 5px;
    cursor: pointer;
    transition: 0.3s;
}
#myImg:hover {opacity: 0.7;}
/* The Modal (background) */
.modal {
    display: none; /* Hidden by default */
    position: fixed; /* Stay in place */
    z-index: 1; /* Sit on top */
    padding-top: 100px; /* Location of the box */
    left: 0;
    top: 0;
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    overflow: auto; /* Enable scroll if needed */
    background-color: rgb(0,0,0); /* Fallback color */
    background-color: rgba(0,0,0,0.9); /* Black w/ opacity */
}
/* Modal Content (image) */
.modal-content {
    margin: auto;
    display: block;
    width: 80%;
    max-width: 700px;
}
/* Caption of Modal Image */
#caption {
    margin: auto;
    display: block;
    width: 80%;
    max-width: 700px;
    text-align: center;
    color: #ccc;
    padding: 10px 0;
    height: 150px;
}
/* Add Animation */
.modal-content, #caption {
    -webkit-animation-name: zoom;
    -webkit-animation-duration: 0.6s;
    animation-name: zoom;
    animation-duration: 0.6s;
}
@-webkit-keyframes zoom {
    from {-webkit-transform:scale(0)}
    to {-webkit-transform:scale(1)}
}
@keyframes zoom {
    from {transform:scale(0)}
    to {transform:scale(1)}
}
/* The Close Button */
.close {
    position: absolute;
    top: 15px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
}
.close:hover,
.close:focus {
    color: #bbb;
    text-decoration: none;
    cursor: pointer;
}
/* 100% Image Width on Smaller Screens */
@media only screen and (max-width: 700px){
    .modal-content {
        width: 100%;
    }
}
</style>
</head>
<body>
<h2>Image Modal</h2>
<p>In this example, we use CSS to create a modal (dialog box) that is hidden by default.</p>
<p>We use JavaScript to trigger the modal and to display the current image inside the modal when it is clicked on. Also note that we use the value from the image's "alt" attribute as an image caption text inside the modal.</p>
<img id="myImg" src="<?php echo base_url('assests/img/profile.png');?>" width="300" height="200">
<!-- The Modal -->
<div id="myModal" class="modal">
  <span class="close">×</span>
  <img class="modal-content" id="img01">
  <div id="caption"></div>
</div>
<script>
// Get the modal
var modal = document.getElementById('myModal');
// Get the image and insert it inside the modal - use its "alt" text as a caption
var img = document.getElementById('myImg');
var modalImg = document.getElementById("img01");
var captionText = document.getElementById("caption");
img.onclick = function(){
    modal.style.display = "block";
    modalImg.src = this.src;
    captionText.innerHTML = this.alt;
}
// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close")[0];
// When the user clicks on <span> (x), close the modal
span.onclick = function() {
    modal.style.display = "none";
}
</script>
</body>
</html>

这可能对你有帮助

<!DOCTYPE html> 
<html lang = "en">
   <head> 
      <meta charset = "utf-8"> 
      <title>CodeIgniter View Example</title> 
      <link rel = "stylesheet" type = "text/css" 
         href = "<?php echo base_url(); ?>css/style.css"> 
      <script type = 'text/javascript' src = "<?php echo base_url(); 
         ?>js/sample.js"></script> 
   </head>
   <body> 
      <a href = 'javascript:test()'>Click Here</a> to execute the javascript function. 
   </body>
</html>

尝试将您的DOM依赖代码置于一些function中，并将function称为文档主体的onload，如下所示:

需要放在你单独的。JS文件中的代码:

function myJSFunction(){
    // Get the modal
    var modal = document.getElementById('myModal');
    // Get the image and insert it inside the modal - use its "alt" text as a caption
    var img = document.getElementById('myImg');
    var modalImg = document.getElementById("img01");
    var captionText = document.getElementById("caption");
    img.onclick = function(){
        modal.style.display = "block";
        modalImg.src = this.src;
        captionText.innerHTML = this.alt;
    }
    // Get the <span> element that closes the modal
    var span = document.getElementsByClassName("close")[0];
    // When the user clicks on <span> (x), close the modal
    span.onclick = function() {
        modal.style.display = "none";
    }
}

修改HTML <body>标签如下:

<body onload="myJSFunction()">
   <h2>Image Modal</h2>
    .
    .

try to this

<link rel = "stylesheet" type = "text/css" href = "<?php echo base_url('path/style.css'); ?> "> 
<script type = 'text/javascript' src = "<?php echo base_url('path/sample.js'); 
         ?>"></script>

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