JSFiddle - React, Tailwind, and code Playground

by matthias_h

HTML

<table>
    <tr>
        <td>
            <img id="pos1" src="slicedImg_01.gif" onclick="change(1)" />
            <img id="pos2" src="slicedImg_02.gif" onclick="change(2)" />
        </td>
        <tr>
            <td>
                <img id="pos3" src="slicedImg_03.gif" onclick="change(3)" />
                <img id="pos4" src="slicedImg_04.gif" onclick="change(4)" />
            </td>
        </tr>
    </tr>
</table>

JavaScript

var image_array = $("img").map(function () {
    return $(this).attr("src");
});
images = jQuery.unique(image_array);
alert(images.length);