Merge pull request #19461 from apache/fix-ssr-data-undefined

fix(ssr): remove redundant SVG attributes with `undefined` value

Author: Ovilia

src/core/echarts.ts

@@ -429,10 +429,14 @@ class ECharts extends Eventful<ECEventDefinition> {
 
         zrender.registerSSRDataGetter(el => {
             const ecData = getECData(el);
+            const dataIndex = ecData.dataIndex;
+            if (dataIndex == null) {
+                return;
+            }
             const hashMap = createHashMap();
             hashMap.set('series_index', ecData.seriesIndex);
-            hashMap.set('data_index', ecData.dataIndex);
-            hashMap.set('ssr_type', ecData.ssrType);
+            hashMap.set('data_index', dataIndex);
+            ecData.ssrType && hashMap.set('ssr_type', ecData.ssrType);
             return hashMap;
         });
 

src/util/innerStore.ts

@@ -75,7 +75,7 @@ export const setCommonECData = (seriesIndex: number, dataType: SeriesDataType, d
                 childECData.seriesIndex = seriesIndex;
                 childECData.dataIndex = dataIdx;
                 childECData.dataType = dataType;
-                childECData.ssrType === 'chart';
+                childECData.ssrType = 'chart';
             });
         }
     }