JSFiddle - React, Tailwind, and code Playground

HTML

<ul id="sortable">
    <li id="pic_0">
        <div class="sortEleWrapper">
            <div class="imgWrapper">
                <img src="/test1.jpg">
            </div>
            <input type="text" name="picText" id="picText" value="""" style="width:105px;color:#aaa" class="sortInput">
        </div>
        <input type="hidden" id="picSrc" name="picSrc" value="/test1.jpg">
    </li>

JavaScript

if ($('#sortable').find('img[src$="/test1.jpg"]').length > 0) {
    alert('img exists');
} else {
    alert('img dosnt exists');
}