您可以使用类似:
function imageExists(image_url){
var http = new XMLHttpRequest();
http.open('HEAD', image_url, false);
http.send();
return http.status != 404;
}
显然,您可以使用jQuery / like执行您的HTTP请求。
$.get(image_url)
.done(function() {
// Do something Now you kNow the image exists.
}).fail(function() {
// Image doesn't exist - do something else.
})