AngularJS Example:

HTML

<div class="copyable">
    <img src="https://s3cdn-observadorontime.netdna-ssl.com/wp-content/uploads/2018/04/20202004/manuel-pinho_770.jpg" alt="Copy Image to Clipboard via Javascript."/>
</div>
<div class="copyable">
    <img src="https://s3cdn-observadorontime.netdna-ssl.com/wp-content/uploads/2018/04/20202004/manuel-pinho_770.jpg" alt="Copy Image to Clipboard via Javascript."/>
</div>

JavaScript

<script>
        //Cross-browser function to select content
        function SelectText(element) {
            var doc = document;
            if (doc.body.createTextRange) {
                var range = document.body.createTextRange();
                range.moveToElementText(element);
                range.select();
            } else if (window.getSelection) {
                var selection = window.getSelection();
                var range = document.createRange();
                range.selectNodeContents(element);
                selection.removeAllRanges();
                selection.addRange(range);
            }
        }
        $(".copyable").click(function (e) {
            //Make the container Div contenteditable
            $(this).attr("contenteditable", true);
            //Select the image
            SelectText($(this).get(0));
            //Execute copy Command
            //Note: This will ONLY work directly inside a click listenner
            document.execCommand('copy');
            //Unselect the content
            window.getSelection().removeAllRanges();
            //Make the container Div uneditable again
            $(this).removeAttr("contenteditable");
            //Success!!
            alert("image copied!");
        });
</script>