JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
    <label for="test">Label</label>
    <span><input name="test" id="test" type="text" /></span>
</div>
<div class="container">
    <label for="test2">Label here more</label>
    <span><input name="test2" id="test2" type="text" /></span>
</div>

CSS

.container {
    background: #ccc;
    display: table;
    width: 100%
}
label {
    display: table-cell;
    width: 1px;
    white-space: nowrap
}
span {
    display: table-cell;
    padding: 0 0 0 5px
}
input {
    width: 100%
}