JSFiddle - React, Tailwind, and code Playground

HTML

<input style="width: 20px" data-ng-model="row.number" type="text" />
<span style="width: 20px">-</span>

CSS

input, span {
        float: left;
        line-height: 15px;
        height: 15px;
    }
    span {
        border: 1px solid transparent;
        border-left-width: 0px;
    }