vue3前端实现全屏显示，元素垂直填满页面

1、 toggleFullscreen方法实现选定元素全屏展示

2、使用flex属性+ flex-direction 实现垂直布局填满整个页面

  
    
      全屏
    
    
      
        
          
          
        
        
      
    
  



import { ref, onMounted, onUnmounted } from 'vue'
import * as echarts from 'echarts'
export default {
  name: 'App',
  setup() {
    const countData = ref([])

    onMounted(() => {
      initChart()
      // initChart1()
    })

    onUnmounted(() => {
    })

    const initChart = () => {
      var chartDom = document.getElementById('bbb')
      let myChart = echarts.getInstanceByDom(chartDom);
      if (myChart) {
        myChart.dispose();
      }
      myChart = echarts.init(chartDom);
      var option = {
        xAxis: {
          type: 'category',
          data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
        },
        yAxis: {
          type: 'value'
        },
        series: [
          {
            data: [820, 932, 901, 934, 1290, 1330, 1320],
            type: 'line',
            smooth: true
          }
        ]
      }
      option && myChart.setOption(option)
      window.addEventListener('resize', function () {
        myChart.resize()
      })
    }

    const initChart1 = () => {
      var chartDom = document.getElementById('ccc')
      let myChart = echarts.getInstanceByDom(chartDom);
      if (myChart) {
        myChart.dispose();
      }
      myChart = echarts.init(chartDom);
      var option = {
        xAxis: {
          type: 'category',
          data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
        },
        yAxis: {
          type: 'value'
        },
        series: [
          {
            data: [820, 932, 901, 934, 1290, 1330, 1320],
            type: 'line',
            smooth: true
          }
        ]
      }
      option && myChart.setOption(option)
      window.addEventListener('resize', function () {
        myChart.resize()
      })
    }

    const toggleFullscreen = () => {
      const element = document.getElementById('aaa')
      if (element) {
        if (document.fullscreenElement) {
          document.exitFullscreen();
        } else {
          element.requestFullscreen()
            .catch(err => {
              console.log('无法进入全屏模式：', err)
            })
        }
      }
    }

    return {
      countData,
      toggleFullscreen
    }
  }
}



body {
  margin: 0;
}

/* 使用flex布局 */
.container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  /* 确保容器元素的高度与视口高度一致 */
}

/* 设置上部元素 */
.header {
  border: 1px solid green;
  height: 100px;
  /* 上部元素的高度 */
  background-color: #ccc;
  /* 上部元素的样式 */
}

/* 设置下部元素 */
.content {
  border: 1px solid yellow;
  flex-grow: 1;
  /* 下部元素占据父元素的剩余空间 */
  background-color: #eee;
  /* 下部元素的样式 */
}

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vue3前端实现全屏显示，元素垂直填满页面

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