full suport for models and hotloading Plugins

nonpacks/static/js/packs_preview.js

@@ -177,6 +177,7 @@
         const member = btn.dataset.member;
         const name = btn.dataset.name || member;
         const modelFormat = btn.dataset.modelFormat || '.geo.json';
+        const slug = btn.dataset.projectSlug || '';
         const opts = { baseUrl: btn.dataset.baseUrl, vanillaBaseUrl: btn.dataset.vanillaBaseUrl, defaultTexture: btn.dataset.defaultTexture || null };
         if (!member || !opts.baseUrl || busy) return;
         busy = true;
@@ -223,6 +224,16 @@
                 busy = false;
                 return;
             }
+            // Pack plugins to hotload (autoload.txt), unless the user opted out.
+            const noHotload = slug && localStorage.getItem('packs:no-hotload:' + slug) === '1';
+            if (!noHotload && btn.dataset.plugins) {
+                try {
+                    const members = JSON.parse(btn.dataset.plugins);
+                    msg.plugins = members.map(m => ({ member: m, url: assetUrl(opts.baseUrl, m) }));
+                } catch (e) {
+                    msg.plugins = [];
+                }
+            }
             if (EMBEDDED_FORMATS.indexOf(modelFormat) !== -1) {
                 // Textures baked into the file — hand it to Blockbench as-is.
                 msg.modelFile = { format: modelFormat, content: await fetchModelText(member, opts.baseUrl) };