vue3使用echart的两种引入方式以及注意事项说明

npm i echarts --save

<script setup>
        import * as echarts from 'echarts'  
</script>

<script setup>
        import * as echarts from 'echarts'  
        provide('echarts',echarts)
</script>

<script setup>
        const echarts  = inject('echarts')
</script>

<script setup>
import * as echarts from 'echarts';
const myCharts = ref(null)
// 基于准备好的dom，初始化echarts实例
var myChart = echarts.init(mycharts.value);
// 绘制图表
myChart.setOption({
  title: {
    text: 'ECharts 入门示例'
  },
  tooltip: {},
  xAxis: {
    data: ['衬衫', '羊毛衫', '雪纺衫', '裤子', '高跟鞋', '袜子']
  },
  yAxis: {},
  series: [
    {
      name: '销量',
      type: 'bar',
      data: [5, 20, 36, 10, 10, 20]
    }
  ]
});
<script>

<script setup>
import * as echarts from 'echarts';
onMounted(()=>{
const myCharts = ref(null)
// 基于准备好的dom，初始化echarts实例
var myChart = echarts.init(mycharts.value);
// 绘制图表
myChart.setOption({
  title: {
    text: 'ECharts 入门示例'
  },
  tooltip: {},
  xAxis: {
    data: ['衬衫', '羊毛衫', '雪纺衫', '裤子', '高跟鞋', '袜子']
  },
  yAxis: {},
  series: [
    {
      name: '销量',
      type: 'bar',
      data: [5, 20, 36, 10, 10, 20]
    }
  ]
});
})
<script>

// MyBook.vue
 
export default {
  setup() {
    // mounted
    onMounted(() => {
      console.log('Component is mounted!')
    })
  }
}

<script setup>
import api from '@/api/index'
var keydata = []
var valuedata = []
const resdata = []
const wordsChartsBox = ref(null)
const echarts = inject('echarts')
function getf() {
    api.get('/backstage').then(res => {
        for (const key in res.data) {
            var element = res.data[key]
            if (key == 1) {
                keydata = element
            } else {
                valuedata = element
            }
        }
        for (let index = 0; index < keydata.length; index++) {
            resdata.push(
                {
                    value: parseInt(valuedata[index]),
                    name: keydata[index]
                }
            )
        }
        const wordsChartsOption = {
            title: {
                text: '常用词统计',
                subtext: '通过常用词统计分析盲人需求',
                left: 'center'
            },
            tooltip: {
                trigger: 'item',
                formatter: '{a} <br/>{b} : {c} ({d}%)'
            },
            legend: {
                type: 'scroll',
                orient: 'vertical',
                right: 10,
                top: 20,
                bottom: 20,
                data: keydata
            },
            series: [
                {
                    name: '姓名',
                    type: 'pie',
                    radius: '55%',
                    center: ['40%', '50%'],
                    data: resdata,
                    emphasis: {
                        itemStyle: {
                            shadowBlur: 10,
                            shadowOffsetX: 0,
                            shadowColor: 'rgba(0, 0, 0, 0.5)'
                        }
                    }
                }
            ]
        }
        const wordsCharts = echarts.init(wordsChartsBox.value)
        wordsCharts.setOption(wordsChartsOption)
    })
    console.log(resdata)
}
onMounted(() => {
    getf()
})
</script>