可视化大屏比例

 <!-- 数据大屏展示内容区域 -->
     <div class="container">
    <div class="screen" ref="screen">
       
    </div>
  </div>

screen.value.style.transform = `scale(${getScale()}) translate(-50%,-50%)` 

//获取数据大屏展示内容盒子的DOM元素
let screen = ref()
onMounted(() => {
  screen.value.style.transform = `scale(${getScale()}) translate(-50%,-50%)`
})
//定义大屏缩放比例
function getScale(w = 1920, h = 1080) {
  const ww = window.innerWidth / w
  const wh = window.innerHeight / h
  return ww < wh ? ww : wh
}
//监听视口变化
window.onresize = () => {
  screen.value.style.transform = `scale(${getScale()}) translate(-50%,-50%)`
}

.container {
  width: 100vw;
  height: 100vh;
  background: url("./images/bg.png") no-repeat;
  background-size: cover;
}
.screen {
    position: fixed;
    width: 1920px;
    height: 1080px;
    left: 50%;
    top: 50%;
    transform-origin: left top;
}