JSFiddle - React, Tailwind, and code Playground

HTML

<form>
    <input type="text" value="no-space-here" /><br/>
    <input type="text" value="" /><br/>
    <input type="text" value="space here" /><br/>
    <input type="text" value="" /><br/>
    <input type="submit" value="submit"> type a space and press Submit
</form>

CSS

input[value*=' ']{
    background-color:#fff5f5;
}