如何将 input 及其“添加”按钮 放置在它们自己的 div 底部？我想使用 Bootstrap 4 或纯 CSS。我尝试了相对位置、绝对位置、固定底部等等，但没有一个让我满意。
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<div class="container w-25">
<div class='header'>
<input class='mt-50' type='text' id='myInput' placeholder='Add a to-do'>
<button type='button'>Add</button>
</div>
<div class='content'></div>
</div>最佳答案
.header {
display:flex;
align-items: flex-end;
height: 200px;
}<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<title>PeyoToDo</title>
<link rel="stylesheet" type="text/css" href="todo.css">
</head>
<body>
<div class="container w-25">
<div class='header'>
<input class='mt-50' type='text' id='myInput' placeholder='Add a to-do'>
<button type='button'>Add</button>
</div>
<div class='content'>
</div>
</div>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
</body>
</html>关于html - 如何将输入定位在它自己的 div 的左下角，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/58237499/