dist/scrollify.es6.js
function blur(progress) {
  var to = (this.options.to !== undefined) ? this.options.to : 0;
  var from = (this.options.from !== undefined) ? this.options.from : 0;
  var amount = (to - from) * progress + from;

  this.element.style.filter = 'blur(' + amount + 'px)';
}
function blur(progress) {
  var to = (this.options.to !== undefined) ? this.options.to : 0;
  var from = (this.options.from !== undefined) ? this.options.from : 0;
  var amount = (to - from) * progress + from;

  this.element.style.filter = 'blur(' + amount + 'px)';
}
function blur ( progress ) { var to = ( this . options . to !== undefined ) ? this . options . to : 0 ; var from = ( this . options . from !== undefined ) ? this . options . from : 0 ; var amount = ( to - from ) * progress + from ; this . element . style . filter = 'blur(' + amount + 'px)' ; }
Update an element's blur.
@param {Float} progress  Current progress of the scene, between 0 and 1.
@this {Object}
@return {void}
Update an element s blur .