Perform explicit bounds check

jridgewell · Apr 20, 2022 · 37ae03d · 37ae03d
1 parent 45f8062
commit 37ae03d
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/trace-mapping.ts b/src/trace-mapping.ts
@@ -321,7 +321,7 @@ export class TraceMap implements SourceMap {
         index = (bias === LEAST_UPPER_BOUND ? upperBound : lowerBound)(segments, column, index);
       } else if (bias === LEAST_UPPER_BOUND) index++;
 
-      if (index < 0 || index == segments.length) return null;
+      if (index === -1 || index === segments.length) return null;
       return segments[index];
     }
   }