Fix SVG entry point handling with data URL and file emission

chevron-down.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-chevron-down-icon lucide-chevron-down"><path d="m6 9 6 6 6-6"/></svg>

src/bundler/linker_context/computeChunks.zig

@@ -195,6 +195,10 @@ pub noinline fn computeChunks(
                     const entry_bits: *const AutoBitSet = &file_entry_bits[source_index.get()];
                     if (css_reprs[source_index.get()] != null) continue;
 
+                    // Check if this file has a JavaScript-like loader
+                    const loader = loaders[source_index.get()];
+                    if (!loader.isJavaScriptLike()) continue;
+
                     if (this.graph.code_splitting) {
                         const js_chunk_key = try temp_allocator.dupe(u8, entry_bits.bytes(this.graph.entry_points.len));
                         var js_chunk_entry = try js_chunks.getOrPut(js_chunk_key);

style.css

@@ -0,0 +1,3 @@
+select {
+  background-image: url("./chevron-down.svg");
+}

test/bundler/bundler_edgecase.test.ts

@@ -2358,3 +2358,27 @@ for (const backend of ["api", "cli"] as const) {
     });
   });
 }
+
+// Fixes #20278
+itBundled("edgecase/SvgEntryPointAndDataUrl", {
+  files: {
+    "/style.css": `select {
+  background-image: url("./chevron-down.svg");
+}`,
+    "/chevron-down.svg": `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-chevron-down-icon lucide-chevron-down"><path d="m6 9 6 6 6-6"/></svg>`,
+  },
+  entryPoints: ["/style.css", "/chevron-down.svg"],
+  outdir: "/out",
+  onAfterBundle(api) {
+    // The CSS should inline the SVG as a data URL
+    api.expectFile("/out/style.css").toContain("background-image: url(");
+    api.expectFile("/out/style.css").toContain("data:image/svg+xml");
+
+    // The SVG should also be emitted as a separate file
+    api
+      .expectFile("/out/chevron-down.svg")
+      .toEqual(
+        `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-chevron-down-icon lucide-chevron-down"><path d="m6 9 6 6 6-6"/></svg>`,
+      );
+  },
+});