mounted() {
    this.eventScroll()
  },

eventScroll() {
      // 选择你想要监听的元素
      const targetLogo = document.getElementById('logoanimation');
 
      // 创建并配置IntersectionObserver
      const observer = new IntersectionObserver((entries) => {
        entries.forEach(entry => {
          if (entry.isIntersecting) {
            targetLogo.style.transform = 'scale(1)'
          } else {
           targetLogo.style.transform = 'scale(0)'
          }
        });
      });
      // 开始监听
      observer.observe(targetLogo);
 }

给要加动画效果的元素设置css样式 默认不显示

 transition: transform 1s ease-in-out;
 transform: scale(0);