From 8b4b4004c1cec9c8538d530ba3a55306ae42b23c Mon Sep 17 00:00:00 2001
From: Ljcbaby <46277145+ljcbaby@users.noreply.github.com>
Date: Mon, 24 Jan 2022 13:14:14 +0800
Subject: [PATCH] Add back `theme.js` (#439)

* fix theme.js
* add preconnect support
---
 _config.yml               | 2 ++
 scripts/helpers/engine.js | 4 ++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/_config.yml b/_config.yml
index f0cfff6..be1e599 100644
--- a/_config.yml
+++ b/_config.yml
@@ -883,5 +883,7 @@ vendors:
 
 # Assets
 # Accelerate delivery of static files using a CDN
+# The js option is only valid when vendors.internal is local.
 css: css
+js: js
 images: images
diff --git a/scripts/helpers/engine.js b/scripts/helpers/engine.js
index beaf178..db3f8a6 100644
--- a/scripts/helpers/engine.js
+++ b/scripts/helpers/engine.js
@@ -25,7 +25,7 @@ hexo.extend.helper.register('next_js', function(file, pjax = false) {
     version : next_version,
     file    : 'source/js/' + file,
     minified: 'source/js/' + file.replace(/\.js$/, '.min.js'),
-    local   : this.url_for(`js/${file}`),
+    local   : this.url_for(`${this.theme.js}/${file}`),
     custom  : custom_cdn_url
   });
   const src = links[internal] || links.local;
@@ -55,7 +55,7 @@ hexo.extend.helper.register('next_pre', function() {
   const { enable, host } = this.theme.font;
   const { internal, plugins, custom_cdn_url } = this.theme.vendors;
   const links = {
-    local   : '',
+    local   : parse(this.theme.js || '').hostname,
     jsdelivr: 'https://cdn.jsdelivr.net',
     unpkg   : 'https://unpkg.com',
     cdnjs   : 'https://cdnjs.cloudflare.com',