JavaScript转换为jQuery转换

Question

我有一些原始的JavaScript代码，我希望它们可以在jquery中重写。那我该怎么做呢？

(function(){

var parallax = document.querySelectorAll(".parallax"),
  speed = 0.1;

window.onscroll = function(){
[].slice.call(parallax).forEach(function(el,i){

  var windowYOffset = window.pageYOffset,
      elBackgrounPos = "100% " + (windowYOffset * speed) + "px";

  el.style.backgroundPosition = elBackgrounPos;

});
};

})();

Answer 1

这是一个jsfiddle：

https://jsfiddle.net/mckinleymedia/d3qt5p94/2/

代码：

var parallax = $(".parallax"),
  speed = 0.1;

window.onscroll = function(){
  parallax.css('backgroundPosition','0 ' + (window.pageYOffset * speed) + "px");
};