Nice work! I noticed that you're caching `this` as a variable: var Blur = this, And it looks like you're doing so to avoid scope problems in anonymous func

Nice work! I noticed that you're caching `this` as a variable: var Blur = this, And it looks like you're doing so to avoid scope problems in anonymous functions: Blur.img.onload = function(){ stackBlurImage( Blur.img, Blur.canvas, blurRadius, Blur.width, Blur.height) }; I personally don't like this style. It makes it harder to read the code. If someone misses that `var Blur = this` line, they could get confused and either not use it, or use it incorrectly. Instead, since you're using ES6, I suggest using the fat arrow: this.img.onload = () => { stackBlurImage(this.img, this.canvas, blurRadius, this.width, this.height); }; (I'm used to writing Coffeescript instead of ES6, so sorry if minor syntax details are wrong.) This is largely a stylistic choice. You can feel free to do things however you want, and if it works, it works. But generally I prefer to make sure things are really clear, and that the Javascript features aren't obscured.