[opt] Add comments.

Author: supervons

src/components/Echarts/index.js

@@ -126,7 +126,7 @@ function Echarts(props, ref) {
   }, [props.extension]);
 
   /**
-   * Support custom actions.
+   * Support custom dynamic events.
    * eventActions: object
    */
   useEffect(() => {

src/components/Echarts/renderChart.js

@@ -23,6 +23,7 @@ export default function renderChart(props) {
     )});
     const myChart = echarts.init(eChartsContainer, '${props.themeName}');
     let formatterVariable = ${toString(props.formatterVariable || "")};
+    // Configuration dynamic events.
     for(let temp of ${JSON.stringify(props.eventArrays || "")}){
       myChart.on(temp, (params)=>{
         const clickParams = {