в классе h-50, как мне выровнять текст по нижней части div с помощью начальной загрузки 4
<link rel = "stylesheet" href = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" integrity = "sha384-WskhaSGFgHYWDcbwN70/dfYBj47jz9qbsMId/iRN3ewGhXQFZCSftd1LZCfmhktB" crossorigin = "anonymous">
<div style='height:300px;border:1px solid #333;'>
<div class = "bg-primary d-inline-block h-25">Height 25%</div>
<div class = "bg-primary d-inline-block text-bottom h-50"><span class='text-bottom'>Height 50%</span></div>
<div class = "bg-primary d-inline-block h-75">Height 75%</div>
<div class = "bg-primary d-inline-block h-100">Height 100%</div>
<div class = "bg-primary d-inline-block h-auto">Height Auto</div>
</div>
Одной из возможностей в Bootstrap 4 было бы использование d-inline-flex flex-column
в div h-50, а затем использование d-flex align-items-end h-100
в div, который обертывает диапазон, который вы хотите выровнять внизу:
<link rel = "stylesheet" href = "https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity = "sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin = "anonymous">
<script src = "https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity = "sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin = "anonymous"></script>
<script src = "https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity = "sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin = "anonymous"></script>
<script src = "https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity = "sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin = "anonymous"></script>
<div style='height:300px;border:1px solid #333;'>
<div class = "bg-primary d-inline-block h-25">Height 25%</div>
<div class = "bg-primary d-inline-flex flex-column h-50">
<div class = "bg-secondary d-flex align-items-end h-100">
<span>Height 50%</span>
</div>
</div>
<div class = "bg-primary d-inline-block h-75">Height 75%</div>
<div class = "bg-primary d-inline-block h-100">Height 100%</div>
<div class = "bg-primary d-inline-block h-auto">Height Auto</div>
</div>