Adding peerDependencies property support for PackageJson component. (#343)

Author: perezd

.chronus/changes/peer-deps-2025-11-10-0-13-16.md

@@ -0,0 +1,7 @@
+---
+changeKind: feature
+packages:
+  - "@alloy-js/typescript"
+---
+
+Adding `peerDependencies` property to `PackageJson` component.

packages/typescript/src/components/PackageJson.tsx

@@ -43,6 +43,9 @@ export interface PackageJsonFileProps {
   /** The dev dependencies of the package. */
   devDependencies?: Record<string, string>;
 
+  /** The peer dependencies of the package. */
+  peerDependencies?: Record<string, string>;
+
   /** The scripts entries of the package. */
   scripts?: Record<string, string>;
 }
@@ -93,6 +96,7 @@ export function PackageJsonFile(props: PackageJsonFileProps) {
           ])
         : undefined,
       devDependencies: props.devDependencies,
+      peerDependencies: props.peerDependencies,
       scripts: props.scripts,
       exports: undefined as any,
     };

packages/typescript/test/package-json.test.tsx

@@ -44,6 +44,9 @@ it("makes a complex package.json", () => {
         devDependencies={{
           typescript: "^5.5.2",
         }}
+        peerDependencies={{
+          zod: "^4.1.0",
+        }}
         exports={{
           ".": "./lib/index.js",
           "./complex": {
@@ -70,6 +73,9 @@ it("makes a complex package.json", () => {
         "devDependencies": {
           "typescript": "^5.5.2"
         },
+        "peerDependencies": {
+          "zod": "^4.1.0"
+        },
         "scripts": {
           "build": "tsc -p .",
           "test": "vitest run",