zod-deep-partial

import { z } from "zod"; import { zodDeepPartial } from "zod-deep-partial"; // 1. Define your base schema const userSchema = z.object({ name: z.string().min(1, "Name is required"), email: z.string().email("Invalid email format"), profile: z.object({ bio: z.string().max(200, "Bio too long"), avatar: z.string().url("Invalid URL format").nullable().optional(), }), tags: z.array(z.string().min(1, "Tag cannot be empty")), settings: z.record(z.string(), z.boolean()), createdAt: z.date(), }); // 2. Create the deep partial schema const partialUserSchema = zodDeepPartial(userSchema); // 3. Use the partial schema for validation and observe type inference // All of these are now valid: try { partialUserSchema.parse({}); console.log("Empty object valid."); } catch (error) { console.error("Validation failed for empty object:", error); } try { partialUserSchema.parse({ name: "John Doe" }); console.log("Object with name valid."); } catch (error) { console.error("Validation failed for object with name:", error); } try { partialUserSchema.parse({ profile: {} }); console.log("Object with empty profile valid."); } catch (error) { console.error("Validation failed for object with empty profile:", error); } try { partialUserSchema.parse({ profile: { bio: "A developer" } }); console.log("Object with partial profile valid."); } catch (error) { console.error("Validation failed for object with partial profile:", error); } try { partialUserSchema.parse({ tags: ["developer"] }); console.log("Object with tags valid."); } catch (error) { console.error("Validation failed for object with tags:", error); } // Example of what still fails (underlying type validations still apply if present) try { partialUserSchema.parse({ email: "invalid-email" }); // Should fail because 'email' is present but malformed console.log("This should not be valid but passed (check expected behavior)."); } catch (error: any) { console.log("Expected validation failure for invalid email:", error.issues[0].message); } // Type inference is preserved correctly type PartialUser = z.infer<typeof partialUserSchema>; // Expected type: /* { name?: string | undefined; email?: string | undefined; profile?: { bio?: string | undefined; avatar?: string | null | undefined; } | undefined; tags?: (string | undefined)[] | undefined; settings?: Record<string, boolean> | undefined; createdAt?: Date | undefined; } */ console.log("Type inference for PartialUser looks correct in IDE.");