JSFiddle - React, Tailwind, and code Playground

HTML

<form id="s9f5b2bb09b74013279b22ae8d1b2df50" method="get" action="http://uleth.summon.serialssolutions.com/search" class="summon-search-widget" accept-charset="utf-8" target="_blank">
    <div class="summon-search-box">
        <input class="summon-search-field" name="s.q" autocomplete="off" placeholder="" data-boxwidth="" type="text"></input>
        <input value="Search" class="summon-search-submit button-website" type="submit"></input>
    </div>
</form>

CSS

.summon-search-field{
    width:20em;
}

JavaScript

$(".summon-search-field").attr("placeholder", "Search for books, articles, videos...");