fix(plugin-md-power): incorrect rendering heading from demo in outline, close #423 (#431)

* fix(plugin-md-power): incorrect rendering heading from `demo` in `outline`, close #423

* chore: tweak

Author: pengzhanbo

plugins/plugin-md-power/src/node/demo/supports/compiler.ts

@@ -26,6 +26,7 @@ export async function compileScript(source: string, type: 'ts' | 'js'): Promise<
   const transform = await compiler.script()
   const res = await transform(source, {
     target: 'es2018',
+    platform: 'browser',
     format: 'cjs',
     loader: type === 'ts' ? 'ts' : 'js',
     sourcemap: false,

theme/src/client/composables/outline.ts

@@ -72,7 +72,7 @@ export function useHeaders(): Ref<MenuItem[]> {
 
 export function getHeaders(range?: ThemeOutline): MenuItem[] {
   const headers = Array.from(
-    document.querySelectorAll('.vp-doc :where(h1,h2,h3,h4,h5,h6)'),
+    document.querySelectorAll('.vp-doc :where(h1,h2,h3,h4,h5,h6):not(.vp-demo-wrapper :where(h1,h2,h3,h4,h5,h6))'),
   )
     .filter(el => el.id && el.hasChildNodes())
     .map((el) => {