example.js

var imageCache = require('./image-cache');
var path = require('path');

imageCache.setOptions({
	dir: path.join(__dirname, 'cache/'),
	compressed: false
});

var images = [
	"https://4.bp.blogspot.com/-QcLPmwZh-VI/WU5rEVtx9WI/AAAAAAAAfWo/Rs9IBKIuqbc94LlWVjoXNSM_HN-6dQpdgCLcBGAs/s400/%255BHorribleSubs%255D%2BYu-Gi-Oh%2521%2BVRAINS%2B-%2B07%2B720p-muxed_001_1409.png",
	"https://images1-focus-opensocial.googleusercontent.com/gadgets/proxy?container=focus&url=https://lh3.googleusercontent.com/-AUpXPK4IOi4/AAAAAAAAAAI/AAAAAAAAAAA/AI6yGXxcuACwUIVtH8VfdOlCD8KQjDDZSw/s32-c-mo/photo.jpg"
];
var image = "https://4.bp.blogspot.com/-QcLPmwZh-VI/WU5rEVtx9WI/AAAAAAAAfWo/Rs9IBKIuqbc94LlWVjoXNSM_HN-6dQpdgCLcBGAs/s400/%255BHorribleSubs%255D%2BYu-Gi-Oh%2521%2BVRAINS%2B-%2B07%2B720p-muxed_001_1409.png";

// Async
imageCache.isCached(image, function(exists) {

	if (exists) {
		imageCache.getCache(image, function(error, result) {
			console.log(result.hashFile);
		});
	} else {
		imageCache.setCache(image, function(error) {
			if (error) {
				console.log(error);
			} else {
				console.log("cache ok");
			}
		});
	}
});
imageCache.fetchImage(image).then((results) => {
	console.log(results);
});
imageCache.flushCache(function(error, results) {
	if (error) {
		console.log(error);
	} else {
		console.log(results);
	}
});


// Sync
var isCached = imageCache.isCachedSync(image);

if (isCached) {
	let imageData = imageCache.getCacheSync(image);

	console.log(imageData.url);
} else {
	imageCache.setCache(image, function(error) {
		if (!error) {
			console.log("cache complete");
		}
	});
}
try {
	imageCache.flushCacheSync();
} catch(error) {
	console.log(error);
}