html - 下拉菜单被截断

Question

我正在 Rails 中构建下拉菜单。我的 application.html.erb 文件中有菜单。在它的正下方，我有我的 <%= yield %> 标记我的内容所在的位置。当我的下拉菜单超出标题部分并进入部分区域时，它会被截断。我已经检查过溢出，但没有一个将其设置为“隐藏”。我不确定发生了什么。如果重要的话， parent 正在 float 。有人可以帮忙吗？

这是问题的图片:

这是 CSS。我将 SASS 与媒体查询结合使用

@media only screen and (max-device-width: 546px) {

$darker-grey: #3e3e3e; 
$dark-grey: #282828;
$gold: #ffd43e;
$light-grey: #b7b7b7; 



a {
    color: $light-grey;
    font-family: arial;
}

body {
    background-color: $dark-grey;
}


p {
    color: white;
    font-family: arial;
}



h1, h2, h3, h4, h5, h6 {
    color: white;
    font-family: arial;
}


 label {
    color: white;
    font-family: arial;
    display:inline; 
    font-style: italic; 
  }

  header {
    width: calc(100% - 70px);
    padding: 35px;
    background-color: black;
    h1 {
        font-size: 28px; 
        color: $gold;
        float: left; 
    }
 }

.alert {
    color: red;
}
.book {
    box-shadow: 0px 0px 20px black;
    display: inline;
    margin-left: auto; 
    margin-right: auto;
    width: 230px; 
    height: 350px; 
}




.book_show {
    box-shadow: 0px 0px 20px black;
    margin-right: 0px;
    margin-bottom: 30px;
    margin-left: auto; 
    margin-right: auto;
    width: 300px;
    display: inline;
}


.btn {
    border: 2px solid $gold;
    border-radius: 5px;
    background-color: none;
    padding-top: 10px;
    padding-bottom: 10px;
    width: 80px;
    color: $gold;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    margin-top: 20px;
    margin-bottom: 20px;
    font-family: arial;

}

.btn_left {
    border: 2px solid $gold;
    border-radius: 5px 0px 0px 5px;
    background-color: none;
    padding-top: 10px;
    padding-bottom: 10px;
    width: 80px;
    color: $gold;
    text-decoration: none;
    display: inline-block;
    margin-top: 20px;
    margin-right: 0px;
    font-family: arial;

}
.btn_right {
    border: 2px solid $gold;
    border-radius: 0px 5px 5px 0px;
    background-color: none;
    padding-top: 10px;
    padding-bottom: 10px;
    width: 80px;
    color: $gold;
    text-decoration: none;
    display: inline-block;
    margin-top: 20px;
    margin-left: 0px;
    font-family: arial;

}
.btn_center {
    border: 2px solid $gold;
    border-radius: 0px; 
    background-color: none;
    padding-top: 10px;
    padding-bottom: 10px;
    width: 80px;
    color: $gold;
    text-decoration: none;
    display: inline-block;
    margin-top: 20px;
    margin-left: 0px;
    font-family: arial;

}
.btn_submit {
        border-radius: 5px; 
        width: 150px;
        margin-top: 20px;
        padding-top: 13px;
        padding-bottom: 13px; 
        background-color: $gold;
        color: white;
        border: 0px;
        text-align: center;
        text-decoration: none; 
        font-family: arial; 
        font-size: 16px;
        display: inline-block; 
    }
.btn_submit:hover {
        background-color: none;
        margin-left: 0px;
}

.buttons {
            text-align: center;
            background-color: none;
            padding-top:30px;
            padding-bottom: 60px;
            clear: left;
            width: 323px;

}

.container_books_index {
    margin-left: auto;
    margin-right: auto;
    width: 85%;
    margin-bottom: 50px;
    text-align:center;
    background-color: none; 
    display: inline-block; 
    display: block;

}



.container_books_show {
    width: 80%;
    background-color: none;  
    text-align: center;
    padding: 0px; 
    display: inline-block; 

    h4 {
        margin-bottom: 20px;
        padding-right: 20px; 

    }
    h2 {
        margin-bottom: 10px;
        padding-right: 20px; 
    }
    hr {
        margin-right: 30px; 
    }
    p {
        margin-bottom: 10px;
        padding-right: 20px; 
    }
    .inner_left {
        width: 323px; 
        background-color: none;
        display: inline-block;
        text-align: center; 
        margin-left: 0px;
        margin-right: 0px;  
    }

}


.hide {
    display: none;  
}


.form_upload {
    color: white;
}


.remember {
            position: relative;
            top: -48px;
            left: 32px;
            margin-bottom: 0px;
        }

remember_label {
        text-align: left;
        width: 5px;  
}




.field_with_errors {
    color: red; 
    margin-bottom: 10px; 
    font-family: arial;

}
.form {
    margin-top: 50px;
    width: 50%;
    margin-left: auto; 
    margin-right: auto;
    h2 {
        margin-bottom: 40px;
        text-align: center;
    }
    p {
        margin-bottom: 10px;

    }
    input {
        margin-bottom: 30px;
        width: 100%;
        height: 20px;
        border-radius: 5px;
        padding: 5px;
    }
    textarea {
        margin-bottom: 20px;
        width: 100%;
        height: 120px;
        border-radius: 5px;
        padding: 10px;
    }
    .submit {
        width: 150px;
        height: 40px;
        margin-top: 20px;
        background-color: $gold;
        color: white;
        border: 0px;
        text-align: center;
        font-size: 16px;
        margin-left: 0px;

    }
    .submit:hover {
        background-color: none;
        margin-left: 0px;
    }
    span {
        font-size: 13px;
        font-style: italic;
    }
}

.menu_icon {
background-color: none;
padding: 0px;
border: none;
cursor: pointer;
width: 30px; 
float: right;
margin-top: 0px; 
position: relative;
top: -10px; 
}

.dropbtn:hover, .dropbtn:focus {
background-color: none;
}

.dropdown {
position: relative;
display: inline-block;
}

.dropdown-content {
display: none;
position: absolute;
background-color: #f9f9f9;
min-width: 160px;
overflow: auto;
right: 0; 
box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
 }

.dropdown-content a {
color: black;
padding: 12px 16px;
text-decoration: none;
display: block;
}

.dropdown a:hover {background-color: #f1f1f1}

.show {display:block;}


nav {
    background-color: none;
    padding-top: 13px;
    float: right;
    a {
        color: $gold;
        text-decoration: none;
        font-family: arial;
        margin-left: 30px;
    }
}

.notice {
    color: green;
}



section {
    overflow: inherit;
    width: 100%;
    padding-top: 50px; 
    text-align: center;
    background-color: none;
    display: inline-block; /* Necessary to trigger "hasLayout" in IE */
    display: block; /* Sets element back to block */
}

}

这是我的 application.html.erb 文件:

<!DOCTYPE html>
<html>
<head>
<title>BookApp</title>
<%= csrf_meta_tags %>
<meta name="viewport" content="width=device-width, initial-scale=1.0">

<%= stylesheet_link_tag    'application', media: 'all', 'data-turbolinks-track': 'reload' %>
<%= javascript_include_tag 'application', 'data-turbolinks-track': 'reload' %>
</head>

<body>


<header>
<h1>Book Reviews</h1>
    <nav>



  <div class="dropdown">
      <img onclick="myFunction()" class="menu_icon" src="/assets/menu_icon.png">
        <div id="myDropdown" class="dropdown-content">
          <a class="hide_when_large" href="#home">Home</a>
          <a class="hide_when_large" href="#about">Logout</a>
          <a class="hide_when_large" href="#contact">Add Book</a>
        </div>
  </div>


   <!--<%= image_tag 'menu_icon', :class => "menu_icon" %>--> 






        <% if user_signed_in? then %>
            <%= link_to "Home", books_path, :class => "hide" %>

        <% end %>



        <% if user_signed_in? then %>
            <%= link_to "Logout", destroy_user_session_path, method: :delete, :class => "hide"  %>
        <% else %>
            <%= link_to "Login", new_user_session_path, :class => "hide"  %>
        <% end %>



        <% if user_signed_in? then %>
            <%= link_to "Add Book", new_book_path, :class => "hide"  %>
        <% end %>
    </nav>  
</header>


<%= yield %>
</body>


<script>

function myFunction() {
document.getElementById("myDropdown").classList.toggle("show");
}

// Close the dropdown if the user clicks outside of it
window.onclick = function(event) {
if (!event.target.matches('.menu_icon')) {

var dropdowns = document.getElementsByClassName("dropdown-content");
var i;
for (i = 0; i < dropdowns.length; i++) {
  var openDropdown = dropdowns[i];
  if (openDropdown.classList.contains('show')) {
    openDropdown.classList.remove('show');
  }
}
}
}
</script>

</html>

这是我的 show.html.erb。请注意它发生在每个 View 中，而不是这个 View ，这让我相信问题出在 application.html.erb

<section>
<div class="container_books_show">

    <div class="inner_left">
    <%= image_tag @book.book_img.url, :class => "book_show" %>  
    <div class="buttons">

            <% if user_signed_in? then %>
                <% if current_user.id = @book.user_id %>
                    <%= link_to "Edit", edit_book_path, :class => "btn_left" %>
                    <%= link_to "Delete", book_path(@book), method: :delete, :class => "btn_right", data: {confirm: "Are you sure?"} %>
                 <% end %>  
             <% end %>
             <br />
             <%= link_to "Back", root_path, :class => "btn" %>
             <br />

             <%= link_to "Add Review", new_book_review_path(@book) , :class => "btn_submit" %>
        </div>  
    </div>


        <h2 class="title"><%= @book.title %></h2>
        <h4><%= @book.author %></h4>
        <div class="average-review-rating" data-score=<%= @average_review %>></div>
        <label>Average Rating</label>
        <br />
        <br />
        <p><%= @book.description %></p>
        <br />

        <% if @book.reviews.count >= 1 %>
            <h4>Reviews</h4>
        <% end %>

        <%= render @book.reviews %>


</div>
</section>
<script> 
$('.review-rating').raty({
readOnly: true,
score: function() {
    return $(this).attr('data-number');
},
path: '/assets/'
});
 </script>

<script>
$('.average-review-rating').raty({
readOnly: true,
path: '/assets/',
score: function() {
    return $(this).attr('data-score')
}
});
</script>

Answer 1

听起来像是 z-index 问题。确保下拉列表的 z-index 高于您希望位于其下方的其他元素。