Updated the files.

my-app/node_modules/ajv/lib/vocabularies/jtd/ref.ts

@@ -0,0 +1,76 @@
+import type {CodeKeywordDefinition, AnySchemaObject} from "../../types"
+import type {KeywordCxt} from "../../compile/validate"
+import {compileSchema, SchemaEnv} from "../../compile"
+import {_, not, nil, stringify} from "../../compile/codegen"
+import MissingRefError from "../../compile/ref_error"
+import N from "../../compile/names"
+import {getValidate, callRef} from "../core/ref"
+import {checkMetadata} from "./metadata"
+
+const def: CodeKeywordDefinition = {
+  keyword: "ref",
+  schemaType: "string",
+  code(cxt: KeywordCxt) {
+    checkMetadata(cxt)
+    const {gen, data, schema: ref, parentSchema, it} = cxt
+    const {
+      schemaEnv: {root},
+    } = it
+    const valid = gen.name("valid")
+    if (parentSchema.nullable) {
+      gen.var(valid, _`${data} === null`)
+      gen.if(not(valid), validateJtdRef)
+    } else {
+      gen.var(valid, false)
+      validateJtdRef()
+    }
+    cxt.ok(valid)
+
+    function validateJtdRef(): void {
+      const refSchema = (root.schema as AnySchemaObject).definitions?.[ref]
+      if (!refSchema) {
+        throw new MissingRefError(it.opts.uriResolver, "", ref, `No definition ${ref}`)
+      }
+      if (hasRef(refSchema) || !it.opts.inlineRefs) callValidate(refSchema)
+      else inlineRefSchema(refSchema)
+    }
+
+    function callValidate(schema: AnySchemaObject): void {
+      const sch = compileSchema.call(
+        it.self,
+        new SchemaEnv({schema, root, schemaPath: `/definitions/${ref}`})
+      )
+      const v = getValidate(cxt, sch)
+      const errsCount = gen.const("_errs", N.errors)
+      callRef(cxt, v, sch, sch.$async)
+      gen.assign(valid, _`${errsCount} === ${N.errors}`)
+    }
+
+    function inlineRefSchema(schema: AnySchemaObject): void {
+      const schName = gen.scopeValue(
+        "schema",
+        it.opts.code.source === true ? {ref: schema, code: stringify(schema)} : {ref: schema}
+      )
+      cxt.subschema(
+        {
+          schema,
+          dataTypes: [],
+          schemaPath: nil,
+          topSchemaRef: schName,
+          errSchemaPath: `/definitions/${ref}`,
+        },
+        valid
+      )
+    }
+  },
+}
+
+export function hasRef(schema: AnySchemaObject): boolean {
+  for (const key in schema) {
+    let sch: AnySchemaObject
+    if (key === "ref" || (typeof (sch = schema[key]) == "object" && hasRef(sch))) return true
+  }
+  return false
+}
+
+export default def