JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" name="name" class="inp" value="Name" /> <br />
<input type="text" name="email" class="inp" value="Mail" /> <br />
<textarea rows="12" name="text" class="inp">Text</textarea><br />
<input type="text" name="site" class="inp" value="Site" />

JavaScript

$(".inp").click(function() {
    if ($(this).val() === "Text" || $(this).val() === "Name" || $(this).val() === "Mail" || $(this).val() === "Site") {
        $(this).val("");
    }
});