diff --git a/lib/converter/converter.js b/lib/converter/converter.js
index 6ea3394..3e9dc4f 100644
--- a/lib/converter/converter.js
+++ b/lib/converter/converter.js
@@ -1231,16 +1231,10 @@ const filterCoverageList = (item) => {
     // the inline sourcemap could be removed
     const maxOffset = source.length;
 
-    const rootFunctionInfo = {
-        root: true,
-        ranges: [{
-            startOffset: minOffset,
-            endOffset: maxOffset,
-            count: 1
-        }]
-    };
+    const wrapperList = [];
 
     const coverageList = functions.filter((block) => {
+
         const { ranges } = block;
 
         // first one is function coverage info
@@ -1250,24 +1244,26 @@ const filterCoverageList = (item) => {
             return true;
         }
 
-        // blocks
-        const len = ranges.length;
-        if (len > 1) {
-            for (let i = 1; i < len; i++) {
-                const range = ranges[i];
-                if (range.startOffset >= minOffset && range.endOffset <= maxOffset) {
-                    rootFunctionInfo.ranges.push(range);
-                }
-            }
-        }
+        wrapperList.push(block);
 
         return false;
     });
 
-    // first one for root function
-    if (rootFunctionInfo.ranges.length > 1) {
-        coverageList.unshift(rootFunctionInfo);
-    }
+
+    const rootFunctionInfo = wrapperList.length ? wrapperList.pop() : {
+        root: true,
+        ranges: [{
+            startOffset: minOffset,
+            endOffset: maxOffset,
+            count: 1
+        }]
+    };
+
+    coverageList.unshift(rootFunctionInfo);
+
+    // if (item.sourcePath.includes('PlaceB.tsx')) {
+    //     console.log(coverageList);
+    // }
 
     return coverageList;
 };
@@ -1275,6 +1271,10 @@ const filterCoverageList = (item) => {
 const initJsCoverageList = (item) => {
     const coverageList = filterCoverageList(item);
 
+    // if (item.sourcePath.includes('PlaceB.tsx')) {
+    //     console.log(coverageList[0]);
+    // }
+
     // function could be covered even it is defined after an uncovered return, see case closures.js
     // fix uncovered range if there are covered ranges in uncovered range