code: function (element, options) {
    this.internalID = randomID()
    this.element = element
    this.width = element.offsetWidth
    this.height = element.offsetHeight
    this.element = element
    this.parent = this.element.parentNode
    this.options = Object.assign({}, Blur.DEFAULTS, options)
    this.overlayEl = this.createOverlay()
    this.blurredImage = null
    this.attachListeners()
    this.generateBlurredImage(this.options.url)
  }
docs: backgroundBlur PUBLIC CLASS DEFINITION ================================