JSFiddle - React, Tailwind, and code Playground

HTML

<div class="page">
    <div class="category">Фамилия:</div>
    <div class="string">Иванов</div>
</div>

CSS

.page {
    width: 200px;
}
.category {
    width: 50%;
    float: left;
}
.string {
    float: right;
    width: 50%;
    border-bottom: 1px solid;
}