fix(compat): remove use of array.at

Co-authored-by: Divyansh Singh <40380293+brc-dd@users.noreply.github.com>

docs/.vitepress/config.ts

@@ -58,7 +58,11 @@ export default defineConfig({
 function nav() {
   return [
     { text: 'Guide', link: '/guide/what-is-vitepress', activeMatch: '/guide/' },
-    { text: 'Config Reference', link: '/config/introduction', activeMatch: '/config/' },
+    {
+      text: 'Config Reference',
+      link: '/config/introduction',
+      activeMatch: '/config/'
+    },
     {
       text: pkg.version,
       items: [

src/node/markdown/plugins/lineNumbers.ts

@@ -27,7 +27,8 @@ export const lineNumberPlugin = (md: MarkdownIt, enable = false) => {
 
     const lineNumbersCode = [
       ...Array(
-        lines.length - (lines.at(-1) === `<span class="line"></span>` ? 1 : 0)
+        lines.length -
+          (lines[lines.length - 1] === `<span class="line"></span>` ? 1 : 0)
       )
     ]
       .map((_, index) => `<span class="line-number">${index + 1}</span><br>`)

src/node/markdown/plugins/snippet.ts

@@ -115,7 +115,7 @@ export const snippetPlugin = (md: MarkdownIt, srcDir: string) => {
       rawTitle = ''
     ] = (rawPathRegexp.exec(rawPath) || []).slice(1)
 
-    const title = rawTitle || filename.split('/').at(-1) || ''
+    const title = rawTitle || filename.split('/').pop() || ''
 
     state.line = startLine + 1