index.js 231 B

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  1. //监听页面滚动
  2. $(window).scroll(function(event){
  3. let winTop = $(window).scrollTop();
  4. if(winTop>50){
  5. $('.header1-page').addClass('bg')
  6. }else{
  7. $('.header1-page').removeClass('bg')
  8. }
  9. });