diff --git a/README.md b/README.md
index d461cf8..cd990b2 100644
--- a/README.md
+++ b/README.md
@@ -155,7 +155,8 @@ See more examples [here](https://github.com/ecomfe/vue-echarts/tree/main/demo).
 
   ECharts' universal interface. Modifying this prop will trigger ECharts' `setOption` method. Read more [here →](https://echarts.apache.org/en/option.html)
 
-  > 💡 When `update-options` is not specified, `notMerge: false` will be specified by default when the `setOption` method is called if the `option` object is modified directly and the reference remains unchanged; otherwise, if a new reference is bound to `option`, ` notMerge: true` will be specified.
+  > [!TIP]
+  > When `update-options` is not specified, `notMerge: false` will be specified by default when the `setOption` method is called if the `option` object is modified directly and the reference remains unchanged; otherwise, if a new reference is bound to `option`, `notMerge: true` will be specified.
 
 - `update-options: object`
 
@@ -195,8 +196,7 @@ You can bind events with Vue's `v-on` directive.
 </template>
 ```
 
-> **Note**
->
+> [!NOTE]
 > Only the `.once` event modifier is supported as other modifiers are tightly coupled with the DOM event system.
 
 Vue-ECharts support the following events:
@@ -337,6 +337,76 @@ export default {
 > - [`showLoading`](https://echarts.apache.org/en/api.html#echartsInstance.showLoading) / [`hideLoading`](https://echarts.apache.org/en/api.html#echartsInstance.hideLoading): use the `loading` and `loading-options` props instead.
 > - `setTheme`: use the `theme` prop instead.
 
+### Slots
+
+Vue-ECharts allows you to define ECharts option's [`tooltip.formatter`](https://echarts.apache.org/en/option.html#tooltip.formatter) and [`toolbox.feature.dataView.optionToContent`](https://echarts.apache.org/en/option.html#toolbox.feature.dataView.optionToContent) callbacks via Vue slots instead of defining them in your `option` object. This simplifies custom HTMLElement rendering using familiar Vue templating.
+
+**Slot Naming Convention**
+
+- Slot names begin with `tooltip`/`dataView`, followed by hyphen-separated path segments to the target.
+- Each segment corresponds to an `option` property name or an array index (for arrays, use the numeric index).
+- The constructed slot name maps directly to the nested callback it overrides.
+
+**Example mappings**:
+
+- `tooltip` → `option.tooltip.formatter`
+- `tooltip-baseOption` → `option.baseOption.tooltip.formatter`
+- `tooltip-xAxis-1` → `option.xAxis[1].tooltip.formatter`
+- `tooltip-series-2-data-4` → `option.series[2].data[4].tooltip.formatter`
+- `dataView` → `option.toolbox.feature.dataView.optionToContent`
+- `dataView-media-1-option` → `option.media[1].option.toolbox.feature.dataView.optionToContent`
+
+The slot props correspond to the first parameter of the callback function.
+
+<details>
+<summary>Usage</summary>
+
+```vue
+<template>
+  <v-chart :option="chartOptions">
+    <!-- Global `tooltip.formatter` -->
+    <template #tooltip="params">
+      <div v-for="(param, i) in params" :key="i">
+        <span v-html="param.marker" />
+        <span>{{ param.seriesName }}</span>
+        <span>{{ param.value[0] }}</span>
+      </div>
+    </template>
+
+    <!-- Tooltip on xAxis -->
+    <template #tooltip-xAxis="params">
+      <div>X-Axis : {{ params.value }}</div>
+    </template>
+
+    <!-- Data View Content -->
+    <template #dataView="option">
+      <table>
+        <thead>
+          <tr>
+            <th v-for="(t, i) in option.dataset[0].source[0]" :key="i">
+              {{ t }}
+            </th>
+          </tr>
+        </thead>
+        <tbody>
+          <tr v-for="(row, i) in option.dataset[0].source.slice(1)" :key="i">
+            <th>{{ row[0] }}</th>
+            <td v-for="(v, i) in row.slice(1)" :key="i">{{ v }}</td>
+          </tr>
+        </tbody>
+      </table>
+    </template>
+  </v-chart>
+</template>
+```
+
+[Example →](https://vue-echarts.dev/#line)
+
+</details>
+
+> [!NOTE]
+> Slots take precedence over the corresponding callback defined in `props.option`.
+
 ### Static Methods
 
 Static methods can be accessed from [`echarts` itself](https://echarts.apache.org/en/api.html#echarts).
diff --git a/README.zh-Hans.md b/README.zh-Hans.md
index 6fefa2a..dceef5f 100644
--- a/README.zh-Hans.md
+++ b/README.zh-Hans.md
@@ -155,7 +155,8 @@ app.component('v-chart', VueECharts)
 
   ECharts 的万能接口。修改这个 prop 会触发 ECharts 实例的 `setOption` 方法。查看[详情 →](https://echarts.apache.org/zh/option.html)
 
-  > 💡 在没有指定 `update-options` 时，如果直接修改 `option` 对象而引用保持不变，`setOption` 方法调用时将默认指定 `notMerge: false`；否则，如果为 `option` 绑定一个新的引用，将指定 `notMerge: true`。
+  > [!TIP]
+  > 在没有指定 `update-options` 时，如果直接修改 `option` 对象而引用保持不变，`setOption` 方法调用时将默认指定 `notMerge: false`；否则，如果为 `option` 绑定一个新的引用，将指定 `notMerge: true`。
 
 - `update-options: object`
 
@@ -195,8 +196,7 @@ app.component('v-chart', VueECharts)
 </template>
 ```
 
-> **Note**
->
+> [!NOTE]
 > 仅支持 `.once` 修饰符，因为其它修饰符都与 DOM 事件机制强耦合。
 
 Vue-ECharts 支持如下事件：
@@ -337,6 +337,76 @@ export default {
 > - [`showLoading`](https://echarts.apache.org/zh/api.html#echartsInstance.showLoading) / [`hideLoading`](https://echarts.apache.org/zh/api.html#echartsInstance.hideLoading)：请使用 `loading` 和 `loading-options` prop。
 > - `setTheme`：请使用 `theme` prop。
 
+### 插槽（Slots）
+
+Vue-ECharts 允许你通过 Vue 插槽来定义 ECharts 配置中的 [`tooltip.formatter`](https://echarts.apache.org/zh/option.html#tooltip.formatter) 和 [`toolbox.feature.dataView.optionToContent`](https://echarts.apache.org/zh/option.html#toolbox.feature.dataView.optionToContent) 回调，而无需在 `option` 对象中定义它们。你可以使用熟悉的 Vue 模板语法来编写自定义提示框或数据视图中的内容。
+
+**插槽命名约定**
+
+- 插槽名称以 `tooltip`/`dataView` 开头，后面跟随用连字符分隔的路径片段，用于定位目标。
+- 每个路径片段对应 `option` 对象的属性名或数组索引（数组索引使用数字形式）。
+- 拼接后的插槽名称直接映射到要覆盖的嵌套回调函数。
+
+**示例映射**：
+
+- `tooltip` → `option.tooltip.formatter`
+- `tooltip-baseOption` → `option.baseOption.tooltip.formatter`
+- `tooltip-xAxis-1` → `option.xAxis[1].tooltip.formatter`
+- `tooltip-series-2-data-4` → `option.series[2].data[4].tooltip.formatter`
+- `dataView` → `option.toolbox.feature.dataView.optionToContent`
+- `dataView-media-1-option` → `option.media[1].option.toolbox.feature.dataView.optionToContent`
+
+插槽的 props 对象对应回调函数的第一个参数。
+
+<details>
+<summary>用法示例</summary>
+
+```vue
+<template>
+  <v-chart :option="chartOptions">
+    <!-- 全局 `tooltip.formatter` -->
+    <template #tooltip="params">
+      <div v-for="(param, i) in params" :key="i">
+        <span v-html="param.marker" />
+        <span>{{ param.seriesName }}</span>
+        <span>{{ param.value[0] }}</span>
+      </div>
+    </template>
+
+    <!-- x轴 tooltip -->
+    <template #tooltip-xAxis="params">
+      <div>X轴: {{ params.value }}</div>
+    </template>
+
+    <!-- 数据视图内容 -->
+    <template #dataView="option">
+      <table>
+        <thead>
+          <tr>
+            <th v-for="(t, i) in option.dataset[0].source[0]" :key="i">
+              {{ t }}
+            </th>
+          </tr>
+        </thead>
+        <tbody>
+          <tr v-for="(row, i) in option.dataset[0].source.slice(1)" :key="i">
+            <th>{{ row[0] }}</th>
+            <td v-for="(v, i) in row.slice(1)" :key="i">{{ v }}</td>
+          </tr>
+        </tbody>
+      </table>
+    </template>
+  </v-chart>
+</template>
+```
+
+[示例 →](https://vue-echarts.dev/#line)
+
+</details>
+
+> [!NOTE]
+> 插槽会优先于 `props.option` 中对应的回调函数。
+
 ### 静态方法
 
 静态方法请直接通过 [`echarts` 本身](https://echarts.apache.org/zh/api.html#echarts)进行调用。
diff --git a/demo/Demo.vue b/demo/Demo.vue
index 9270f02..9e33e98 100644
--- a/demo/Demo.vue
+++ b/demo/Demo.vue
@@ -8,6 +8,7 @@ import { track } from "@vercel/analytics";
 
 import LogoChart from "./examples/LogoChart.vue";
 import BarChart from "./examples/BarChart.vue";
+import LineChart from "./examples/LineChart.vue";
 import PieChart from "./examples/PieChart.vue";
 import PolarChart from "./examples/PolarChart.vue";
 import ScatterChart from "./examples/ScatterChart.vue";
@@ -74,6 +75,7 @@ watch(codeOpen, (open) => {
     </p>
 
     <bar-chart />
+    <line-chart />
     <pie-chart />
     <polar-chart />
     <scatter-chart />
diff --git a/demo/data/line.js b/demo/data/line.js
new file mode 100644
index 0000000..35f1601
--- /dev/null
+++ b/demo/data/line.js
@@ -0,0 +1,56 @@
+export default function getData() {
+  return {
+    textStyle: {
+      fontFamily: 'Inter, "Helvetica Neue", Arial, sans-serif',
+      fontWeight: 300,
+    },
+    legend: { top: 20 },
+    tooltip: {
+      trigger: "axis",
+    },
+    dataset: {
+      source: [
+        ["product", "2012", "2013", "2014", "2015", "2016", "2017"],
+        ["Milk Tea", 56.5, 82.1, 88.7, 70.1, 53.4, 85.1],
+        ["Matcha Latte", 51.1, 51.4, 55.1, 53.3, 73.8, 68.7],
+        ["Cheese Cocoa", 40.1, 62.2, 69.5, 36.4, 45.2, 32.5],
+        ["Walnut Brownie", 25.2, 37.1, 41.2, 18, 33.9, 49.1],
+      ],
+    },
+    xAxis: {
+      type: "category",
+      triggerEvent: true,
+      tooltip: { show: true, formatter: "" },
+    },
+    yAxis: {
+      triggerEvent: true,
+      tooltip: { show: true, formatter: "" },
+    },
+    series: [
+      {
+        type: "line",
+        smooth: true,
+        seriesLayoutBy: "row",
+        emphasis: { focus: "series" },
+      },
+      {
+        type: "line",
+        smooth: true,
+        seriesLayoutBy: "row",
+        emphasis: { focus: "series" },
+      },
+      {
+        type: "line",
+        smooth: true,
+        seriesLayoutBy: "row",
+        emphasis: { focus: "series" },
+      },
+      {
+        type: "line",
+        smooth: true,
+        seriesLayoutBy: "row",
+        emphasis: { focus: "series" },
+      },
+    ],
+  };
+}
diff --git a/demo/examples/Example.vue b/demo/examples/Example.vue
index 88fa11e..3e36779 100644
--- a/demo/examples/Example.vue
+++ b/demo/examples/Example.vue
@@ -43,7 +43,7 @@ defineProps({
   width: fit-content;
   margin: 2em auto;
 
-  .echarts {
+  > .echarts {
     width: calc(60vw + 4em);
     height: 360px;
     max-width: 720px;
diff --git a/demo/examples/LineChart.vue b/demo/examples/LineChart.vue
new file mode 100644
index 0000000..30173d4
--- /dev/null
+++ b/demo/examples/LineChart.vue
@@ -0,0 +1,108 @@
+<script setup>
+import { use } from "echarts/core";
+import { LineChart, PieChart } from "echarts/charts";
+import {
+  GridComponent,
+  DatasetComponent,
+  LegendComponent,
+  TooltipComponent,
+  ToolboxComponent,
+} from "echarts/components";
+import { shallowRef } from "vue";
+import VChart from "../../src/ECharts";
+import VExample from "./Example.vue";
+import getData from "../data/line";
+
+use([
+  DatasetComponent,
+  GridComponent,
+  LegendComponent,
+  LineChart,
+  TooltipComponent,
+  ToolboxComponent,
+  PieChart,
+]);
+
+const option = shallowRef(getData());
+const axis = shallowRef("xAxis");
+
+function getPieOption(params) {
+  const option = {
+    dataset: { source: [params[0].dimensionNames, params[0].data] },
+    series: [
+      {
+        type: "pie",
+        radius: ["60%", "100%"],
+        seriesLayoutBy: "row",
+        itemStyle: {
+          borderRadius: 5,
+          borderColor: "#fff",
+          borderWidth: 2,
+        },
+        label: {
+          position: "center",
+          formatter: params[0].name,
+          fontFamily: 'Inter, "Helvetica Neue", Arial, sans-serif',
+          fontWeight: 300,
+        },
+      },
+    ],
+  };
+  return option;
+}
+</script>
+
+<template>
+  <v-example
+    id="line"
+    title="Line chart"
+    desc="(with tooltip and dataView slots)"
+  >
+    <v-chart :option="option" autoresize>
+      <template #tooltip="params">
+        <v-chart
+          :style="{ width: '100px', height: '100px' }"
+          :option="getPieOption(params)"
+          autoresize
+        />
+      </template>
+      <template #[`tooltip-${axis}`]="params">
+        {{ axis === "xAxis" ? "Year" : "Value" }}:
+        <b>{{ params.name }}</b>
+      </template>
+      <template #dataView="option">
+        <table style="margin: 20px auto">
+          <thead>
+            <tr>
+              <th v-for="(t, i) in option.dataset[0].source[0]" :key="i">
+                {{ t }}
+              </th>
+            </tr>
+          </thead>
+          <tbody>
+            <tr v-for="(row, i) in option.dataset[0].source.slice(1)" :key="i">
+              <th>{{ row[0] }}</th>
+              <td v-for="(v, i) in row.slice(1)" :key="i">{{ v }}</td>
+            </tr>
+          </tbody>
+        </table>
+      </template>
+    </v-chart>
+    <template #extra>
+      <p class="actions">
+        Custom tooltip on
+        <select v-model="axis">
+          <option value="xAxis">X Axis</option>
+          <option value="yAxis">Y Axis</option>
+        </select>
+      </p>
+    </template>
+  </v-example>
+</template>
+
+<style scoped>
+th,
+td {
+  padding: 4px 8px;
+}
+</style>
diff --git a/package.json b/package.json
index 163c7b9..ec7620b 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,7 @@
   ],
   "peerDependencies": {
     "echarts": "^6.0.0-beta.1",
-    "vue": "^3.1.1"
+    "vue": "^3.3.0"
   },
   "devDependencies": {
     "@highlightjs/vue-plugin": "^2.1.0",
diff --git a/src/ECharts.ts b/src/ECharts.ts
index a6b0d88..93739f0 100644
--- a/src/ECharts.ts
+++ b/src/ECharts.ts
@@ -10,6 +10,7 @@ import {
   h,
   nextTick,
   watchEffect,
+  toValue,
 } from "vue";
 import { init as initChart } from "echarts/core";
 
@@ -19,9 +20,10 @@ import {
   autoresizeProps,
   useLoading,
   loadingProps,
-  type PublicMethods,
+  useSlotOption,
 } from "./composables";
-import { isOn, omitOn, toValue } from "./utils";
+import type { PublicMethods, SlotsTypes } from "./composables";
+import { isOn, omitOn } from "./utils";
 import { register, TAG_NAME } from "./wc";
 
 import type { PropType, InjectionKey } from "vue";
@@ -64,8 +66,9 @@ export default defineComponent({
     ...loadingProps,
   },
   emits: {} as unknown as Emits,
+  slots: Object as SlotsTypes,
   inheritAttrs: false,
-  setup(props, { attrs, expose }) {
+  setup(props, { attrs, expose, slots }) {
     const root = shallowRef<EChartsElement>();
     const chart = shallowRef<EChartsType>();
     const manualOption = shallowRef<Option>();
@@ -93,6 +96,15 @@ export default defineComponent({
     const listeners: Map<{ event: string; once?: boolean; zr?: boolean }, any> =
       new Map();
 
+    const { teleportedSlots, patchOption } = useSlotOption(slots, () => {
+      if (!manualUpdate.value && props.option && chart.value) {
+        chart.value.setOption(
+          patchOption(props.option),
+          realUpdateOptions.value,
+        );
+      }
+    });
+
     // We are converting all `on<Event>` props and collect them into `listeners` so that
     // we can bind them to the chart instance later.
     // For `onNative:<event>` props, we just strip the `Native:` part and collect them into
@@ -174,7 +186,7 @@ export default defineComponent({
       function commit() {
         const opt = option || realOption.value;
         if (opt) {
-          instance.setOption(opt, realUpdateOptions.value);
+          instance.setOption(patchOption(opt), realUpdateOptions.value);
         }
       }
 
@@ -204,7 +216,7 @@ export default defineComponent({
       if (!chart.value) {
         init(option);
       } else {
-        chart.value.setOption(option, updateOptions || {});
+        chart.value.setOption(patchOption(option), updateOptions);
       }
     };
 
@@ -234,7 +246,7 @@ export default defineComponent({
               if (!chart.value) {
                 init();
               } else {
-                chart.value.setOption(option, {
+                chart.value.setOption(patchOption(option), {
                   // mutating `option` will lead to `notMerge: false` and
                   // replacing it with new reference will lead to `notMerge: true`
                   notMerge: option !== oldOption,
@@ -312,11 +324,15 @@ export default defineComponent({
     // This type casting ensures TypeScript correctly types the exposed members
     // that will be available when using this component.
     return (() =>
-      h(TAG_NAME, {
-        ...nonEventAttrs.value,
-        ...nativeListeners,
-        ref: root,
-        class: ["echarts", ...(nonEventAttrs.value.class || [])],
-      })) as unknown as typeof exposed & PublicMethods;
+      h(
+        TAG_NAME,
+        {
+          ...nonEventAttrs.value,
+          ...nativeListeners,
+          ref: root,
+          class: ["echarts", nonEventAttrs.value.class],
+        },
+        teleportedSlots(),
+      )) as unknown as typeof exposed & PublicMethods;
   },
 });
diff --git a/src/composables/index.ts b/src/composables/index.ts
index 7708f91..68526de 100644
--- a/src/composables/index.ts
+++ b/src/composables/index.ts
@@ -1,3 +1,4 @@
 export * from "./api";
 export * from "./autoresize";
 export * from "./loading";
+export * from "./slot";
diff --git a/src/composables/loading.ts b/src/composables/loading.ts
index e305fc9..6c76379 100644
--- a/src/composables/loading.ts
+++ b/src/composables/loading.ts
@@ -1,5 +1,4 @@
-import { inject, computed, watchEffect } from "vue";
-import { toValue } from "../utils";
+import { inject, computed, watchEffect, toValue } from "vue";
 
 import type { Ref, InjectionKey, PropType } from "vue";
 import type {
@@ -18,7 +17,7 @@ export function useLoading(
 ): void {
   const defaultLoadingOptions = inject(LOADING_OPTIONS_KEY, {});
   const realLoadingOptions = computed(() => ({
-    ...(toValue(defaultLoadingOptions) || {}),
+    ...toValue(defaultLoadingOptions),
     ...loadingOptions?.value,
   }));
 
diff --git a/src/composables/slot.ts b/src/composables/slot.ts
new file mode 100644
index 0000000..b355526
--- /dev/null
+++ b/src/composables/slot.ts
@@ -0,0 +1,146 @@
+import {
+  h,
+  Teleport,
+  onUpdated,
+  onUnmounted,
+  onMounted,
+  shallowRef,
+  shallowReactive,
+  warn,
+} from "vue";
+import type { Slots, SlotsType } from "vue";
+import type { Option } from "../types";
+import { isValidArrayIndex, isSameSet } from "../utils";
+import type { TooltipComponentFormatterCallbackParams } from "echarts";
+
+const SLOT_OPTION_PATHS = {
+  tooltip: ["tooltip", "formatter"],
+  dataView: ["toolbox", "feature", "dataView", "optionToContent"],
+} as const;
+type SlotPrefix = keyof typeof SLOT_OPTION_PATHS;
+type SlotName = SlotPrefix | `${SlotPrefix}-${string}`;
+type SlotRecord<T> = Partial<Record<SlotName, T>>;
+const SLOT_PREFIXES = Object.keys(SLOT_OPTION_PATHS) as SlotPrefix[];
+
+function isValidSlotName(key: string): key is SlotName {
+  return SLOT_PREFIXES.some(
+    (slotPrefix) => key === slotPrefix || key.startsWith(slotPrefix + "-"),
+  );
+}
+
+export function useSlotOption(slots: Slots, onSlotsChange: () => void) {
+  const detachedRoot =
+    typeof window !== "undefined" ? document.createElement("div") : undefined;
+  const containers = shallowReactive<SlotRecord<HTMLElement>>({});
+  const initialized = shallowReactive<SlotRecord<boolean>>({});
+  const params = shallowReactive<SlotRecord<unknown>>({});
+  const isMounted = shallowRef(false);
+
+  // Teleport the slots to a detached root
+  const teleportedSlots = () => {
+    // Make slots client-side only to avoid SSR hydration mismatch
+    return isMounted.value
+      ? h(
+          Teleport,
+          { to: detachedRoot },
+          Object.entries(slots)
+            .filter(([key]) => isValidSlotName(key))
+            .map(([key, slot]) => {
+              const slotName = key as SlotName;
+              const slotContent = initialized[slotName]
+                ? slot?.(params[slotName])
+                : undefined;
+              return h(
+                "div",
+                {
+                  ref: (el) => (containers[slotName] = el as HTMLElement),
+                  style: { display: "contents" },
+                },
+                slotContent,
+              );
+            }),
+        )
+      : undefined;
+  };
+
+  // Shallow-clone the option along the path and override the target callback
+  function patchOption(src: Option): Option {
+    const root = { ...src };
+
+    Object.keys(slots)
+      .filter((key) => {
+        const isValidSlot = isValidSlotName(key);
+        if (!isValidSlot) {
+          warn(`Invalid vue-echarts slot name: ${key}`);
+        }
+        return isValidSlot;
+      })
+      .forEach((key) => {
+        const path = key.split("-");
+        const prefix = path.shift() as SlotPrefix;
+        path.push(...SLOT_OPTION_PATHS[prefix]);
+
+        let cur: any = root;
+        for (let i = 0; i < path.length - 1; i++) {
+          const seg = path[i];
+          const next = cur[seg];
+
+          // Shallow-clone the link; create empty shell if missing
+          cur[seg] = next
+            ? Array.isArray(next)
+              ? [...next]
+              : { ...next }
+            : isValidArrayIndex(seg)
+              ? []
+              : {};
+          cur = cur[seg];
+        }
+        cur[path[path.length - 1]] = (p: unknown) => {
+          initialized[key] = true;
+          params[key] = p;
+          return containers[key];
+        };
+      });
+
+    return root;
+  }
+
+  // `slots` is not reactive, so we need to watch it manually
+  let slotNames: SlotName[] = [];
+  onUpdated(() => {
+    const newSlotNames = Object.keys(slots).filter(isValidSlotName);
+    if (!isSameSet(newSlotNames, slotNames)) {
+      // Clean up states for removed slots
+      slotNames.forEach((key) => {
+        if (!newSlotNames.includes(key)) {
+          delete params[key];
+          delete initialized[key];
+          delete containers[key];
+        }
+      });
+      slotNames = newSlotNames;
+      onSlotsChange();
+    }
+  });
+
+  onMounted(() => {
+    isMounted.value = true;
+  });
+
+  onUnmounted(() => {
+    detachedRoot?.remove();
+  });
+
+  return {
+    teleportedSlots,
+    patchOption,
+  };
+}
+
+export type SlotsTypes = SlotsType<
+  Record<
+    "tooltip" | `tooltip-${string}`,
+    TooltipComponentFormatterCallbackParams
+  > &
+    Record<"dataView" | `dataView-${string}`, Option>
+>;
diff --git a/src/types.ts b/src/types.ts
index 0e44e81..df574f8 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -1,17 +1,8 @@
 import { init } from "echarts/core";
 
 import type { SetOptionOpts, ECElementEvent, ElementEvent } from "echarts/core";
-import type { Ref, ShallowRef, WritableComputedRef, ComputedRef } from "vue";
+import type { MaybeRefOrGetter } from "vue";
 
-export type MaybeRef<T = any> =
-  | T
-  | Ref<T>
-  | ShallowRef<T>
-  | WritableComputedRef<T>;
-export type MaybeRefOrGetter<T = any> =
-  | MaybeRef<T>
-  | ComputedRef<T>
-  | (() => T);
 export type Injection<T> = MaybeRefOrGetter<T | null>;
 
 type InitType = typeof init;
diff --git a/src/utils.ts b/src/utils.ts
index 6dec3f5..4dc1e11 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,6 +1,3 @@
-import type { MaybeRefOrGetter } from "./types";
-import { unref } from "vue";
-
 type Attrs = Record<string, any>;
 
 // Copied from
@@ -19,13 +16,25 @@ export function omitOn(attrs: Attrs): Attrs {
   return result;
 }
 
-// Copied from
-// https://github.com/vuejs/core/blob/3cb4db21efa61852b0541475b4ddf57fdec4c479/packages/shared/src/general.ts#L49-L50
-// eslint-disable-next-line @typescript-eslint/no-unsafe-function-type
-const isFunction = (val: unknown): val is Function => typeof val === "function";
+export function isValidArrayIndex(key: string): boolean {
+  const num = Number(key);
+  return (
+    Number.isInteger(num) &&
+    num >= 0 &&
+    num < Math.pow(2, 32) - 1 &&
+    String(num) === key
+  );
+}
 
-// Copied from
-// https://github.com/vuejs/core/blob/3cb4db21efa61852b0541475b4ddf57fdec4c479/packages/reactivity/src/ref.ts#L246-L248
-export function toValue<T>(source: MaybeRefOrGetter<T>): T {
-  return isFunction(source) ? source() : unref(source);
+export function isSameSet<T>(a: T[], b: T[]): boolean {
+  const setA = new Set(a);
+  const setB = new Set(b);
+
+  if (setA.size !== setB.size) return false;
+
+  for (const val of setA) {
+    if (!setB.has(val)) return false;
+  }
+
+  return true;
 }