fix: allow npm: specifiers in import.meta.resolve (#21716)

Closes https://github.com/denoland/deno/issues/21298.

"npm:" specifiers are matched against import map entries
and if no match is found they are passed through.

3 files changed, 17 insertions, 8 deletions

diff --git a/cli/tests/testdata/run/import_meta/importmap.json b/cli/tests/testdata/run/import_meta/importmap.json
index f8c056afd..d85fe3028 100644
--- a/cli/tests/testdata/run/import_meta/importmap.json
+++ b/cli/tests/testdata/run/import_meta/importmap.json
@@ -6,6 +6,7 @@
     "1": "https://example.com/PASS-1",
     "null": "https://example.com/PASS-null",
     "undefined": "https://example.com/PASS-undefined",
-    "[object Object]": "https://example.com/PASS-object"
+    "[object Object]": "https://example.com/PASS-object",
+    "npm:preact": "https://example.com/preact"
   }
 }
diff --git a/cli/tests/testdata/run/import_meta/main.out b/cli/tests/testdata/run/import_meta/main.out
index 1b51f1cdf..0329dea8a 100644
--- a/cli/tests/testdata/run/import_meta/main.out
+++ b/cli/tests/testdata/run/import_meta/main.out
@@ -7,5 +7,6 @@ Resolving without a value from import map https://example.com/PASS-undefined
 Resolving 1 from import map https://example.com/PASS-1
 Resolving null from import map https://example.com/PASS-null
 Resolving object from import map https://example.com/PASS-object
-TypeError: "npm:" specifiers are currently not supported in import.meta.resolve()
-    at file:///[WILDCARD]testdata/run/import_meta/main.ts:36:15
+Resolving npm:cowsay npm:cowsay
+Resolving npm:cowsay@1 npm:cowsay@1
+Resolving npm:preact from import map https://example.com/preact
diff --git a/cli/tests/testdata/run/import_meta/main.ts b/cli/tests/testdata/run/import_meta/main.ts
index b6d9c506e..96d63ba78 100644
--- a/cli/tests/testdata/run/import_meta/main.ts
+++ b/cli/tests/testdata/run/import_meta/main.ts
@@ -32,8 +32,15 @@ assertThrows(() => {
 assertThrows(() => {
   import.meta.resolve("://malformed/url?asdf");
 }, TypeError);
-try {
-  import.meta.resolve("npm:cowsay");
-} catch (e) {
-  console.log(e);
-}
+console.log(
+  "Resolving npm:cowsay",
+  import.meta.resolve("npm:cowsay"),
+);
+console.log(
+  "Resolving npm:cowsay@1",
+  import.meta.resolve("npm:cowsay@1"),
+);
+console.log(
+  "Resolving npm:preact from import map",
+  import.meta.resolve("npm:preact"),
+);