JSFiddle - React, Tailwind, and code Playground

HTML

<div class="box-a4">
    <form>
        <input type="text" placeholder="Search" class="search-here">
            <div class="search-dropdown">
                <a href="#">Lorem ipsum dolor sit amet, consectetur adipisicing elit.</a>
                <a href="#">Dolorum a aperiam nemo ex fuga esse at expedita sed quo sequi voluptas labore.</a>
                <a href="#">Dolorum a aperiam nemo ex fuga esse at expedita sed quo sequi voluptas labore, nihil assumenda quidem dolore illo, consequuntur neque quasi. Lorem ipsum dolor sit amet, consectetur adipisicing elit.</a>
            </div>
        </form>
    </div>

CSS

.search-here{
    width: 100%;
    height: 30px;
    border: 1px solid #000;
    padding: 5px 10px
}

.search-dropdown{
    width: 100%;
    height: auto;
    overflow: hidden;
    background: #ececec;
    border-radius: 2px;
    margin-top: 5px;
    display: none;
}

.search-dropdown a{
    display: block;
    padding: 5px;
    border-bottom: 1px solid #dddddd;
    text-decoration: none;
    color: #000;
}

JavaScript

$( document ).ready(function() {
    $('.search-here').onload=function() {
        if($('.search-here').val() == ""){
          $('.search-dropdown').hide();
        } else {
          $('.search-dropdown').show();
        }
    };    
    
    $('.search-here').on('paste', function () {
        $('.search-dropdown').show();
    }); 
});