add time.Time support

Author: hhhapz

wasm/reflect_from.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"reflect"
 	"syscall/js"
+	"time"
 )
 
 // ErrMultipleReturnValue is an error where a JS function is attempted to be unmarshalled into a Go function with
@@ -123,6 +124,9 @@ func decodeValue(x js.Value, v reflect.Value) error {
 		if isArray(x) {
 			return decodeArray(x, v)
 		}
+		if isDate(x) {
+			return decodeDate(x, v)
+		}
 		return decodeObject(x, v)
 	case js.TypeFunction:
 		return decodeFunction(x, v)
@@ -204,6 +208,17 @@ func decodeArray(x js.Value, v reflect.Value) error {
 	return nil
 }
 
+// decodeDate decodes a JS date into the provided reflect.Value.
+func decodeDate(x js.Value, v reflect.Value) error {
+	t, ok := v.Addr().Interface().(*time.Time)
+	if !ok {
+		return InvalidTypeError{js.TypeObject, v.Type()}
+	}
+	millis := x.Call("getTime").Int()
+	*t = time.UnixMilli(int64(millis))
+	return nil
+}
+
 // decodeObject decodes a JS object into the provided reflect.Value.
 func decodeObject(x js.Value, v reflect.Value) error {
 	switch v.Kind() {
@@ -424,6 +439,16 @@ func isArray(x js.Value) bool {
 	return arr.Call("isArray", x).Bool()
 }
 
+// isDate uses x instanceof Date to check if the provided js.Value is a Date.
+func isDate(x js.Value) bool {
+	date, err := Global().Get("Date")
+	if err != nil {
+		panic("Date not found")
+	}
+
+	return x.InstanceOf(date)
+}
+
 // initializePointerIfNil checks if the pointer is nil and initializes it as necessary.
 func initializePointerIfNil(v reflect.Value) {
 	if v.Kind() != reflect.Ptr {

wasm/reflect_to.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"reflect"
 	"syscall/js"
+	"time"
 	"unsafe"
 )
 
@@ -52,6 +53,12 @@ func ToJSValue(x interface{}) js.Value {
 			"real": real(x),
 			"imag": imag(x),
 		})
+	case time.Time:
+		date, err := Global().Get("Date")
+		if err != nil {
+			panic("Date constructor not found")
+		}
+		return date.New(x.Format(time.RFC3339))
 	}
 
 	value := reflect.ValueOf(x)
@@ -113,11 +120,7 @@ func mapToJSObject(x reflect.Value) js.Value {
 
 	obj := objectConstructor.New()
 	iter := x.MapRange()
-	for {
-		if !iter.Next() {
-			break
-		}
-
+	for iter.Next() {
 		key := iter.Key()
 		value := iter.Value().Interface()
 		switch key := key.Interface().(type) {