JSFiddle - React, Tailwind, and code Playground

HTML

<img id="test1" class="notThis" src="https://twimg0-a.akamaihd.net/profile_images/92365683/kitten_normal.jpg" />
<img id="test2" class="ignore" src="https://twimg0-a.akamaihd.net/profile_images/92365683/kitten_normal.jpg" />
<img id="test3" class="good" src="https://twimg0-a.akamaihd.net/profile_images/92365683/kitten_normal.jpg" />

JavaScript

var classes = new Array(".notThis", ".ignore");

//Test($("#test1"));
//Test($("#test2"));
//Test($("#test3"));

$("img").not(classes.join(", ")).css("border", "solid 1px blue");

function Test($img) {    
    if (!$img.is(classes.join(", "))) {
        $img.css("border", "solid 1px red");
    }
}