jquery - calc() 与 jQuery(背景位置)

Question

如何用 jQuery 替换 CSS calc()？

var scrollPos = $(window).scrollTop(),
    posY = Math.floor(0.2 * scrollPos);

$('.background-layer').css('background-position', '50% calc(50% + ' + posY + 'px)');

Answer 1

这可能对您有帮助:

<div class="lala">
sdasd
</div>
 var posY=50;
 $(document).ready(function(){
    $(".lala").css('background-position-y',"50%").css('background-position-
   y','+='+posY+'px')

});

https://jsfiddle.net/m5946szm/1/