我有一个 bootstrap 3 Jumbotron，我正在尝试在 Angular 上应用丝带。现在授予它有大量关于如何在线应用 css 功能区的示例，但不是在 bootstrap 3 Jumbotron 上。我相信这些类(class)与功能区类(class)有冲突，我不明白为什么它不会坐在 Jumbotron 上。见下文
.ribbon-wrapper-green {
width: 180px;
height: 172px;
overflow: hidden;
position: absolute;
top: -4px;
right: -4px;
}
.ribbon-green {
font: bold 12px Sans-Serif;
color: #333;
text-align: center;
text-shadow: rgba(255,255,255,0.5) 0px 1px 0px;
-webkit-transform: rotate(45deg);
-moz-transform: rotate(45deg);
-ms-transform: rotate(45deg);
-o-transform: rotate(45deg);
position: relative;
padding: 7px 0;
left: -5px;
top: 45px;
width: 235px;
background-color: #BFDC7A;
background-image: -webkit-gradient(linear, left top, left bottom, from(#BFDC7A), to(#8EBF45));
background-image: -webkit-linear-gradient(top, #BFDC7A, #8EBF45);
background-image: -moz-linear-gradient(top, #BFDC7A, #8EBF45);
background-image: -ms-linear-gradient(top, #BFDC7A, #8EBF45);
background-image: -o-linear-gradient(top, #BFDC7A, #8EBF45);
color: #6a6340;
-webkit-box-shadow: 0px 0px 3px rgba(0,0,0,0.3);
-moz-box-shadow: 0px 0px 3px rgba(0,0,0,0.3);
box-shadow: 0px 0px 3px rgba(0,0,0,0.3);
white-space: nowrap;
}
.ribbon-green:before, .ribbon-green:after {
content: "";
border-top: 3px solid #6e8900;
border-left: 3px solid transparent;
border-right: 3px solid transparent;
position:absolute;
bottom: -3px;
}
.ribbon-green:before {
left: 0;
}
.ribbon-green:after {
right: 0;
}<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<div class="ribbon-wrapper-green"><div class="ribbon-green">The Flagship Programme of<br />Aaaaa Aaaaaa Aaaaaaaaa</div></div>
<div class="jumbotron">
<h1>Bootstrap Tutorial</h1>
<p>Bootstrap is the most popular HTML, CSS, and JS framework for developing responsive, mobile-first projects on the web.</p>
</div>
<p>This is some text.</p>
<p>This is another text.</p>
</div>
</body>
</html>最佳答案
只需为 jumbotron 类添加相对位置并在 jumbotron 内移动功能区。
HTML:
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container" style="margin-top:20px;">
<div class="jumbotron" class="relative">
<div class="ribbon-wrapper-green"><div class="ribbon-green">The Flagship Programme of<br />Aaaaa Aaaaaa Aaaaaaaaa</div></div>
<h1>Bootstrap Tutorial</h1>
<p>Bootstrap is the most popular HTML, CSS, and JS framework for developing responsive, mobile-first projects on the web.</p>
</div>
<p>This is some text.</p>
<p>This is another text.</p>
</div>
</body>
</html>
CSS:
.ribbon-wrapper-green {
width: 180px;
height: 172px;
overflow: hidden;
position: absolute;
top: -4px;
right: -4px;
}
.ribbon-green {
font: bold 12px Sans-Serif;
color: #333;
text-align: center;
text-shadow: rgba(255,255,255,0.5) 0px 1px 0px;
-webkit-transform: rotate(45deg);
-moz-transform: rotate(45deg);
-ms-transform: rotate(45deg);
-o-transform: rotate(45deg);
position: relative;
padding: 7px 0;
left: -5px;
top: 45px;
width: 235px;
background-color: #BFDC7A;
background-image: -webkit-gradient(linear, left top, left bottom, from(#BFDC7A), to(#8EBF45));
background-image: -webkit-linear-gradient(top, #BFDC7A, #8EBF45);
background-image: -moz-linear-gradient(top, #BFDC7A, #8EBF45);
background-image: -ms-linear-gradient(top, #BFDC7A, #8EBF45);
background-image: -o-linear-gradient(top, #BFDC7A, #8EBF45);
color: #6a6340;
-webkit-box-shadow: 0px 0px 3px rgba(0,0,0,0.3);
-moz-box-shadow: 0px 0px 3px rgba(0,0,0,0.3);
box-shadow: 0px 0px 3px rgba(0,0,0,0.3);
white-space: nowrap;
}
.ribbon-green:before, .ribbon-green:after {
content: "";
border-top: 3px solid #6e8900;
border-left: 3px solid transparent;
border-right: 3px solid transparent;
position:absolute;
bottom: -3px;
}
.jumbotron {
position: relative;
}
.ribbon-green:before {
left: 0;
}
.ribbon-green:after {
right: 0;
}
您将在超大屏幕上获得丝带。
关于css - 在 bootstrap 3 Jumbotron 上应用 css ribbon，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/58191319/