fix: props.children error in code component (#3663)

Author: sanyuan0704

.changeset/three-weeks-tie.md

@@ -0,0 +1,7 @@
+---
+'@modern-js/doc-core': patch
+---
+
+fix(doc-core): props.children error in code component
+
+fix(doc-core): 修复 code 组件中 props.children 不存在的错误

packages/cli/doc-core/src/theme-default/layout/DocLayout/docComponents/code.tsx

@@ -50,11 +50,12 @@ export function Code(props: {
     registerLanguages();
   }
   const { className, meta } = props;
-  const children = props.children.trim();
   const language = className?.replace(/language-/, '');
   if (!language) {
     return <code {...props}></code>;
   }
+  const children = props.children.trim();
+
   let highlightMeta = '';
   let highlightLines: number[] = [];
   if (meta) {