JSFiddle - React, Tailwind, and code Playground

HTML

<img src="//placehold.it/64" title="foobar" />
<img src="//placehold.it/64/ff0000" />
<img src="//placehold.it/64" title="foobar" />
<img src="//placehold.it/64" title="foobar" />
<img src="//placehold.it/64/ff0000" />
<img src="//placehold.it/64" title="foobar" />
<img src="//placehold.it/64" title="foobar" />
<img src="//placehold.it/64/ff0000" />

JavaScript

var imgArray = [document.getElementsByTagName('img')];
imgArray = $("[title=foobar]").on('click', function () {
    console.log('indexof', imgArray.index(this))
});