methods:{  /** 增加动画成果 */  aniCom(ele, posit, leng1, leng2) {    $(window).scroll(function () {      let winTop = $(window).scrollTop()      $(ele).each(function () {        if ($(this).offset().top < winTop + $(window).height()) {          $(this).css({            opacity: 1,            [posit]: leng1,            transitionDuration: '1.2s'          })        } else if ($(this).offset().top - $(window).height() >= winTop) {          $(this).css({            opacity: 0,            [posit]: leng2,            transitionDuration: '1.2s'          })        }      })    })  }}mounted() {  this.$nextTick(() => {    this.aniCom($('.animate'), 'bottom', '104px', '0px')    this.aniCom($('.vip'), 'top', '50%', '70%')    this.aniCom($('.text'), 'bottom', '54px', '0')  })}