load-image.js

// string -> Promise Image
export function loadImage(url) {
	var image = new Image();
	var promise = waitImage(image);
	image.src = url;
	return promise;
}

wait-image.js

// Image -> Promise Image
export function waitImage(image) {
	return new Promise((resolve, reject) => {
		if (image.complete) {
			resolve(image);
		} else {
			image.addEventListener('error', handleError, false);
			image.addEventListener('load', handleLoad, false);
		}

		function handleError(error) {
			cleanup();
			reject(error);
		}

		function handleLoad() {
			cleanup();
			resolve(image);
		}

		function cleanup() {
			image.removeEventListener('error', handleError, false);
			image.removeEventListener('load', handleLoad, false);
		}
	});
}