update according to the review

Author: kingyue737

README.md

@@ -156,7 +156,7 @@ 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)
 
   > [!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.
+  > 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`
 
@@ -376,7 +376,7 @@ Vue-ECharts allows you to define ECharts option's `tooltip.formatter` callbacks
 </template>
 ```
 
-[Example→](https://vue-echarts.dev/#line)
+[Example →](https://vue-echarts.dev/#line)
 
 </details>
 

README.zh-Hans.md

@@ -376,7 +376,7 @@ Vue-ECharts 允许你通过 Vue 插槽来定义 ECharts 配置中的 `tooltip.fo
 </template>
 ```
 
-[Example→](https://vue-echarts.dev/#line)
+[示例 →](https://vue-echarts.dev/#line)
 
 </details>
 

demo/data/line.js

@@ -1,5 +1,9 @@
 export default function getData() {
   return {
+    textStyle: {
+      fontFamily: 'Inter, "Helvetica Neue", Arial, sans-serif',
+      fontWeight: 300,
+    },
     legend: { top: 20 },
     tooltip: {
       trigger: "axis",

demo/examples/LineChart.vue

@@ -37,7 +37,14 @@ function getPieOption(params) {
           borderColor: "#fff",
           borderWidth: 2,
         },
-        label: { position: "center", formatter: params[0].name },
+        label: {
+          position: "center",
+          formatter: params[0].name,
+          textStyle: {
+            fontFamily: 'Inter, "Helvetica Neue", Arial, sans-serif',
+            fontWeight: 300,
+          },
+        },
       },
     ],
   };

src/composables/tooltip.ts

@@ -65,7 +65,7 @@ export function useTooltip(slots: Slots, onSlotsChange: () => void) {
             // shallow-clone the link; create empty shell if missing
             cur[seg] = next
               ? Array.isArray(next)
-                ? next.slice()
+                ? [...next]
                 : { ...next }
               : isValidArrayIndex(seg)
                 ? []

src/utils.ts

@@ -32,5 +32,10 @@ export function toValue<T>(source: MaybeRefOrGetter<T>): T {
 
 export function isValidArrayIndex(key: string): boolean {
   const num = Number(key);
-  return Number.isInteger(num) && num >= 0 && num < Math.pow(2, 32) - 1;
+  return (
+    Number.isInteger(num) &&
+    num >= 0 &&
+    num < Math.pow(2, 32) - 1 &&
+    String(num) === key
+  );
 }