utils.js

utils.js

// Convert Image to binary to arrayBuffer to clipboard (not work)

var canvasDataUrl = ((document.getElementsByClassName("canvasjs-chart-canvas"))[0]).toDataURL("image/png");
  fetch(canvasDataUrl)
  	.then(res => res.arrayBuffer())
		.then(arrayBuffer => {
    	const uint8Array = new Uint8Array(arrayBuffer);
      document.addEventListener('copy', function(e) {
        var str = '';
        uint8Array.forEach(function(d) {
          str += String.fromCharCode(d)
        })
        //You can ignore setting third parameter value
        e.clipboardData.setData('text', str, true);
        console.info('data copied');
        e.preventDefault();
      });
      document.execCommand('copy');
    })

https://jsfiddle.net/gq2uk1wd/