Fix playground shared links bug (#1863)

Author: chownces

src/pages/playground/Playground.tsx

@@ -154,6 +154,12 @@ function handleHash(hash: string, props: PlaygroundProps) {
     props.handleEditorValueChange(program);
   }
 
+  const ext =
+    Object.values(ExternalLibraryName).find(v => v === qs.ext) || ExternalLibraryName.NONE;
+  if (ext) {
+    props.handleExternalSelect(ext, true);
+  }
+
   const chapter = stringParamToInt(qs.chap) || undefined;
   const variant: Variant =
     sourceLanguages.find(
@@ -163,12 +169,6 @@ function handleHash(hash: string, props: PlaygroundProps) {
     props.handleChapterSelect(chapter, variant);
   }
 
-  const ext =
-    Object.values(ExternalLibraryName).find(v => v === qs.ext) || ExternalLibraryName.NONE;
-  if (ext) {
-    props.handleExternalSelect(ext, true);
-  }
-
   const execTime = Math.max(stringParamToInt(qs.exec || '1000') || 1000, 1000);
   if (execTime) {
     props.handleChangeExecTime(execTime);