import * as echarts from "echarts";
const eChaDom = ref(null); // 用于初始化Echarts畫布需要的dom元素
const chart = ref(null) // 用于存儲Echarts
chart.value = echarts.init(eChaDom.value) // 初始化實例

import * as echarts from "echarts";
let eChaDom = document.querySelector('.eChaDom'); // 用于初始化Echarts畫布需要的dom元素
let chart = null // 用于存儲Echarts
chart = echarts.init(eChaDom) // 初始化實例

import * as echarts from "echarts";
const eChaDom = shallowRef(null); // 用于初始化Echarts畫布需要的dom元素
const chart = shallowRef(null) // 用于存儲Echarts
chart.value = echarts.init(eChaDom.value) // 初始化實例

import { ref, markRaw, shallowRef } from "vue";
import * as echarts from "echarts";
const eChaDom = ref(null); // 用于初始化Echarts畫布需要的dom元素
const chart = ref(null) // 用于存儲Echarts
chart.value = markRaw(echarts.init(eChaDom.value)) // 初始化實例

<template>
    <div ref="eChaDom" :style="{ height: h }" />
</template>
<script setup>
import { watch, onMounted, onBeforeUnmount, ref, shallowRef } from "vue";
import * as echarts from "echarts";
import debounce from 'lodash/debounce'
const props = defineProps({
    h: {
        type: String,
        default: '360px'
    },
    options: {
        type: Object,
        default: () => ({})
    },
    theme: {
        type: String,
        default: 'dark'
    }
})
// const eChaDom = ref(null); // 這樣resize有報錯
// const chart = ref(null)
const eChaDom = shallowRef(null); // 這樣resize就沒報錯了
const chart = shallowRef(null)
const init = () => {
    chart.value = echarts.init(eChaDom.value, props.theme)
    chart.value.setOption(props.options);
    window.addEventListener('resize', debounce(resizeFn, 360))
}
const resizeFn = () => {
    chart.value.resize()
}
onMounted(() => {
    init()
})
watch(
    () => props.options,
    (newOptions) => {
        chart.value.setOption(newOptions);
    },
    { deep: true }
)
onBeforeUnmount(() => {
    window.removeEventListener('resize', resizeFn)
})
</script>

<template>
    <div class="tenBox">
        <eCha :options="options" h="600px" />
    </div>
</template>
<script setup>
import eCha from "@/components/eCha/index.vue";
const options = {
    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
        }
    ]
}