Update mime dependency to 4.0

.changeset/short-symbols-rest.md

@@ -0,0 +1,5 @@
+---
+"@cloudflare/workers-shared": patch
+---
+
+Update mime dependency to 4.X so that javascript files will have content types of `text/javascript` instead of `application/javascript`. This will affect the content-types computed by Asset Worker within Workers Static Assets.

packages/workers-shared/package.json

@@ -47,11 +47,10 @@
 		"@cloudflare/workers-tsconfig": "workspace:*",
 		"@cloudflare/workers-types": "catalog:default",
 		"@sentry/cli": "^2.37.0",
-		"@types/mime": "^3.0.4",
 		"concurrently": "^8.2.2",
 		"esbuild": "catalog:default",
 		"ignore": "^5.2.0",
-		"mime": "^3.0.0",
+		"mime": "^4.0.7",
 		"rimraf": "catalog:default",
 		"toucan-js": "4.0.0",
 		"typescript": "catalog:default",

packages/workers-shared/utils/helpers.ts

@@ -1,7 +1,7 @@
 import { readFileSync } from "node:fs";
 import { isAbsolute, resolve, sep } from "node:path";
 import ignore from "ignore";
-import { getType } from "mime";
+import mime from "mime";
 import {
 	CF_ASSETS_IGNORE_FILENAME,
 	HEADERS_FILENAME,
@@ -18,7 +18,7 @@ export const normalizeFilePath = (relativeFilepath: string) => {
 };
 
 export const getContentType = (absFilePath: string) => {
-	let contentType = getType(absFilePath);
+	let contentType = mime.getType(absFilePath);
 	if (
 		contentType &&
 		contentType.startsWith("text/") &&

packages/workers-shared/utils/tests/helpers.test.ts

@@ -3,7 +3,7 @@ import { writeFile } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
 import { describe, expect, it } from "vitest";
-import { createAssetsIgnoreFunction } from "../helpers";
+import { createAssetsIgnoreFunction, getContentType } from "../helpers";
 
 describe("assets", () => {
 	const tmpDir = mkdtempSync(join(tmpdir(), "wrangler-tests"));
@@ -54,3 +54,10 @@ describe("assets", () => {
 		});
 	});
 });
+
+describe("getContentType", () => {
+	it("should return 'text/javascript", () => {
+		const contentType = getContentType("/_astro/sponsors.CIiPz7eJ.js");
+		expect(contentType).toBe("text/javascript; charset=utf-8");
+	});
+});