perf: 优化 pr 代码

src/directives/highlight.ts

@@ -0,0 +1,15 @@
+import type { App, Directive } from 'vue'
+import hljs from 'highlight.js'
+
+const regexp = /^(?:\s{4}|\t).+/gm
+
+export default function setupHighlightDirective(app: App) {
+  const highLightDirective: Directive<HTMLElement> = {
+    mounted(el: HTMLElement) {
+      if (el.textContent?.indexOf(' = ') !== -1 || el.textContent.match(regexp))
+        hljs.highlightBlock(el)
+    },
+  }
+
+  app.directive('highlight', highLightDirective)
+}