refactor(NavbarItem): improve readability and maintainability

website/src/theme/NavbarItem/DefaultNavbarItem.tsx

@@ -1,26 +1,49 @@
 import React from 'react'
+import { useLocation } from '@docusaurus/router'
 export * from '@theme-original/NavbarItem/DefaultNavbarItem'
 import OriginalNavbarItem from '@theme-original/NavbarItem/DefaultNavbarItem'
 import { API_BUTTON } from '../../constants.js'
-import { useLocation } from '@docusaurus/router'
 
-const regex = /\/docs\/(0.([0-9]+)(\.[0-9]+)?|next)?/
+const VERSION_REGEX = /\/docs\/(0.([0-9]+)(\.[0-9]+)?|next)?/
+const API_BASE_URLS = {
+    next: 'https://api.yew.rs/next/yew',
+    default: 'https://docs.rs/yew',
+}
 
+/**
+ * @returns {string}
+ */
 const useVersion = () => {
     const location = useLocation()
-    const match = location.pathname.match(regex)
+    const match = location.pathname.match(VERSION_REGEX)
     return match ? (match[1] ?? '') : ''
 }
 
+/**
+ * @param {string} version
+ * @returns {string}
+ */
+const getApiUrl = (version) => {
+    if (version === 'next') {
+        return API_BASE_URLS.next
+    }
+    return version
+        ? `${API_BASE_URLS.default}/${version}`
+        : API_BASE_URLS.default
+}
+
+/**
+ * @param {Object} props
+ * @param {string} props.label
+ * @returns {React.ReactElement}
+ */
 export default function DefaultNavbarItem(props) {
-    const version = useVersion()
+    const { label, ...restProps } = props
 
-    if (props.label === API_BUTTON) {
-        const href =
-            version === 'next'
-                ? 'https://api.yew.rs/next/yew'
-                : `https://docs.rs/yew/${version}`
-        return <OriginalNavbarItem {...props} href={href} />
+    if (label === API_BUTTON) {
+        const version = useVersion()
+        const href = getApiUrl(version)
+        return <OriginalNavbarItem {...restProps} label={label} href={href} />
     }
 
     return <OriginalNavbarItem {...props} />