Adjust CPP implementation

Author: MatiPl01

packages/react-native-reanimated/Common/cpp/reanimated/CSS/common/values/CSSColor.cpp

@@ -100,13 +100,11 @@ CSSColor::CSSColor(const folly::dynamic &value)
 }
 
 bool CSSColor::canConstruct(jsi::Runtime &rt, const jsi::Value &jsiValue) {
-  return jsiValue.isNumber() || jsiValue.isUndefined() ||
-      (jsiValue.isString() && jsiValue.getString(rt).utf8(rt) == "transparent");
+  return jsiValue.isNumber() || jsiValue.isNull();
 }
 
 bool CSSColor::canConstruct(const folly::dynamic &value) {
-  return value.isNumber() || value.empty() ||
-      (value.isString() && value.getString() == "transparent");
+  return value.isNumber() || value.isNull();
 }
 
 folly::dynamic CSSColor::toDynamic() const {

packages/react-native-reanimated/Common/cpp/reanimated/CSS/svg/values/SVGBrush.cpp

@@ -24,12 +24,12 @@ SVGBrush::SVGBrush(const folly::dynamic &value)
 bool SVGBrush::canConstruct(jsi::Runtime &rt, const jsi::Value &jsiValue) {
   return jsiValue.isNumber() || jsiValue.isUndefined() ||
       (jsiValue.isString() &&
-       isValidColorString(jsiValue.getString(rt).utf8(rt)));
+       jsiValue.getString(rt).utf8(rt) == "currentColor");
 }
 
 bool SVGBrush::canConstruct(const folly::dynamic &value) {
   return value.isNumber() || value.empty() ||
-      isValidColorString(value.asString());
+      value.asString() == "currentColor";
 }
 
 folly::dynamic SVGBrush::toDynamic() const {
@@ -78,8 +78,4 @@ std::ostream &operator<<(std::ostream &os, const SVGBrush &colorValue) {
 
 #endif // NDEBUG
 
-bool SVGBrush::isValidColorString(const std::string &value) {
-  return value == "transparent" || value == "currentColor";
-}
-
 } // namespace reanimated::css

packages/react-native-reanimated/src/common/processors/shadows.ts

@@ -59,7 +59,7 @@ export const processBoxShadowNative: ValueProcessor<
     } = shadow;
     const processedColor = processColor(color);
 
-    if (processedColor === null) {
+    if (processedColor === undefined) {
       throw new ReanimatedError(
         ERROR_MESSAGES.invalidColor(color, JSON.stringify(shadow))
       );