// https://stackoverflow.com/questions/9714525/javascript-image-url-verify

// checks to see if the url ends in any of these four extensions (jpeg|jpg|gif|png)

function checkurl(/sitelet?url=https%3A%2F%2Fgithub.com%2F0xbaha%2Fjavascript%2Fblob%2Fmain%2Furl) {

return(url.match(/\.(jpeg|jpg|gif|png)$/) != null);

}