improved esbuild plugin

CHANGELOG.md

@@ -9,6 +9,7 @@ Go to the `v1` branch to see the changelog of Lume 1.
 ### Added
 - Feed plugin: Add image support [#599], [#598].
 - New middleware `shutdown`.
+- Esbuild plugin: support for `jsr:` specifiers.
 
 ### Changed
 - For better predictability, the `_cache` folder is generated in the root folder, instead of `src` folder.
@@ -18,7 +19,8 @@ Go to the `v1` branch to see the changelog of Lume 1.
 
 ### Fixed
 - Updated dependencies: `unocss`, `liquid`, `postcss-nesting`, `terser`, `xml`, `react`, `std`, `sass`, `preact`.
-- FFF plugin: fix `getGitDate` priority. [#603]
+- FFF plugin: fix `getGitDate` priority [#603].
+- Esbuild plugin: resolve bare specifiers mapped to `npm:`.
 
 ## [2.1.4] - 2024-04-17
 ### Added

plugins/esbuild.ts

@@ -96,21 +96,21 @@ export default function (userOptions?: Options) {
     site.loadAssets(options.extensions);
 
     function resolve(path: string) {
-      // "npm:" specifiers are currently not supported in import.meta.resolve()
-      // https://github.com/denoland/deno/issues/21298
-      if (!path.startsWith("npm:")) {
-        path = import.meta.resolve(path);
-      }
+      path = import.meta.resolve(path);
+      const match = path.match(/^(npm|jsr):(.*)$/);
 
-      if (!path.startsWith("npm:")) {
+      if (!match) {
         return {
           path,
           namespace: "deno",
         };
       }
 
-      const name = path.replace(/^npm:/, "");
-      const url = new URL(`https://esm.sh/${name}`);
+      const [, prefix, name] = match;
+
+      const url = prefix === "npm"
+        ? new URL(`https://esm.sh/${name}`)
+        : new URL(`https://esm.sh/jsr/${name}`);
 
       if (options.esm.dev) {
         url.searchParams.set("dev", "true");