Revision 0.32.19

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@sinclair/typebox",
-  "version": "0.32.18",
+  "version": "0.32.19",
   "description": "Json Schema Type Builder with Static Type Resolution for TypeScript",
   "keywords": [
     "typescript",

src/value/convert/convert.ts

@@ -240,7 +240,12 @@ function FromUndefined(schema: TUndefined, references: TSchema[], value: any): u
   return TryConvertUndefined(value)
 }
 function FromUnion(schema: TUnion, references: TSchema[], value: any): unknown {
-  return schema.anyOf.reduce((value, schema) => Visit(schema, references, value), value)
+  for (const subschema of schema.anyOf) {
+    const converted = Visit(subschema, references, value)
+    if (!Check(subschema, references, converted)) continue
+    return converted
+  }
+  return value
 }
 function Visit(schema: TSchema, references: TSchema[], value: any): unknown {
   const references_ = IsString(schema.$id) ? [...references, schema] : references

test/runtime/value/convert/union.ts

@@ -14,12 +14,12 @@ describe('value/convert/Union', () => {
     Assert.IsEqual(V2, { x: null })
     Assert.IsEqual(V3, { x: 'hello' })
   })
-  it('Should convert last variant in ambiguous conversion', () => {
+  it('Should convert first variant in ambiguous conversion', () => {
     const T = Type.Object({
       x: Type.Union([Type.Boolean(), Type.Number()]),
     })
     const V1 = Value.Convert(T, { x: '1' })
-    Assert.IsEqual(V1, { x: 1 })
+    Assert.IsEqual(V1, { x: true })
   })
   // ----------------------------------------------------------------
   // https://github.com/sinclairzx81/typebox/issues/787
@@ -38,6 +38,6 @@ describe('value/convert/Union', () => {
     const C = Convert(T, { a: '1', b: '2', c: '3' })
     Assert.IsEqual(A, { a: 1, c: 2 })
     Assert.IsEqual(B, { b: 1, c: 2 })
-    Assert.IsEqual(C, { a: 1, b: 2, c: 3 })
+    Assert.IsEqual(C, { a: 1, b: '2', c: 3 }) // note: matching on first
   })
 })