Improve override docs

Author: colinhacks

packages/docs/content/json-schema.mdx

@@ -398,7 +398,7 @@ z.toJSONSchema(User, { reused: "ref" });
 
 ### `override`
 
-To define some custom override logic, use `override`. The provided callback has access to the original Zod schema and the default JSON Schema. *This function should dircectly modify `ctx.jsonSchema`.*
+To define some custom override logic, use `override`. The provided callback has access to the original Zod schema and the default JSON Schema. *This function should directly modify `ctx.jsonSchema`.*
 
 
 ```ts
@@ -416,6 +416,20 @@ z.toJSONSchema(mySchema, {
 
 Note that unrepresentable types will throw an `Error` before this functions is called. If you are trying to define custom behavior for an unrepresentable type, you'll need to use set the `unrepresentable: "any"` alongside `override`.
 
+```ts
+// support z.date() as ISO datetime strings
+const result = z.toJSONSchema(z.date(), {
+  unrepresentable: "any",
+  override: (ctx) => {
+    const def = ctx.zodSchema._zod.def;
+    if(def.type ==="date"){
+      ctx.jsonSchema.type = "string";
+      ctx.jsonSchema.format = "date-time";
+    }
+  },
+});
+```
+
 ### `io`
 
 Some schema types have different input and output types, e.g. `ZodPipe`, `ZodDefault`, and coerced primitives. By default, the result of `z.toJSONSchema` represents the *output type*; use `"io": "input"` to extract the input type instead.

play.ts

@@ -1,3 +1,20 @@
 import * as z from "zod/v4";
 
 z;
+
+const result = z.toJSONSchema(z.date(), {
+  unrepresentable: "any",
+  override: (ctx) => {
+    const def = ctx.zodSchema._zod.def;
+    if (def.type === "date") {
+      ctx.jsonSchema.type = "string";
+      ctx.jsonSchema.format = "date-time";
+    }
+  },
+});
+/* => {
+  type: 'string',
+  format: 'date-time',
+  '$schema': 'https://json-schema.org/draft/2020-12/schema'
+} */
+console.dir(result, { depth: null });