可滚动的固定表格在左侧显示

Question

我想在屏幕左侧显示一个邮件图标，就像下面的图片一样，即使我们滚动页面但点击时，它仍然保持在固定的位置一个带有时事通讯输入字段的小表单滑出。

我该怎么做？

Answer 1

有一个简单的例子。填写表格。点击“整页”。预览这里摘录坏作品

// Get the modal 
 
var modal = document.getElementById('myModal'); 
 

 
// Get the button that opens the modal 
 
var btn = document.getElementById("myBtn"); 
 

 
// Get the <span> element that closes the modal 
 
var span = document.getElementsByClassName("close")[0]; 
 

 
// When the user clicks the button, open the modal 
 
btn.onclick = function() { 
 
    modal.style.display = "block"; 
 
} 
 

 
// When the user clicks on <span> (x), close the modal 
 
span.onclick = function() { 
 
    modal.style.display = "none"; 
 
} 
 

 
// When the user clicks anywhere outside of the modal, close it 
 
window.onclick = function(event) { 
 
    if (event.target == modal) { 
 
    modal.style.display = "none"; 
 
    } 
 
}

.page { 
 
    width: 980 px; 
 
    margin: 0 auto; 
 
    height: 1200px; 
 
    border: 3px solid red; 
 
} 
 

 
.form { 
 
    top: 300px; 
 
    left: 20px; 
 
    display: block; 
 
    position: fixed; 
 
    border: 1px solid black; 
 
} 
 

 

 
/* The Modal (background) */ 
 

 
.modal { 
 
    display: none; 
 
    /* Hidden by default */ 
 
    position: fixed; 
 
    /* Stay in place */ 
 
    z-index: 1; 
 
    /* Sit on top */ 
 
    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, 0.4); 
 
    /* Black w/ opacity */ 
 
} 
 

 

 
/* Modal Content/Box */ 
 

 
.modal-content { 
 
    background-color: #fefefe; 
 
    margin: 15% auto; 
 
    /* 15% from the top and centered */ 
 
    padding: 20px; 
 
    border: 1px solid #888; 
 
    width: 80%; 
 
    /* Could be more or less, depending on screen size */ 
 
} 
 

 

 
/* The Close Button */ 
 

 
.close { 
 
    color: #aaa; 
 
    float: right; 
 
    font-size: 28px; 
 
    font-weight: bold; 
 
} 
 

 
.close:hover, 
 
.close:focus { 
 
    color: black; 
 
    text-decoration: none; 
 
    cursor: pointer; 
 
}

<div class="page"> 
 
    <div class="form"> 
 
    <!-- Trigger/Open The Modal --> 
 
    <button id="myBtn">My form</button> 
 
    <!-- The Modal --> 
 
    <div id="myModal" class="modal"> 
 

 
     <!-- Modal content --> 
 
     <div class="modal-content"> 
 
     <span class="close">&times;</span> 
 
     <p>Some text in the Modal..</p> 
 
     </div> 
 

 
    </div> 
 
    </div> 
 
</div>