JSFiddle - React, Tailwind, and code Playground

HTML

<div class=formline>
        <div class=txt>
            <input type=text>
        </div>
        <input type=submit value=submit>
</div>
<div class=formline>
        <div class=txt>
            <input type=text>
        </div>
        <input type=submit value="do something else">
</div>

CSS

.formline{
        display: inline-table;
    }
    .txt{
        display: table-cell;
        width: 100%;
    }
    input[type=text]{
        -moz-box-sizing: border-box; box-sizing: border-box;
        width: 100%;
    }