The specified type '{ rippleColor: any; }' cannot be assigned to type 'ColorValue | null | undefined'

I've been diving into learning reactnative (expo) with typescript, but I've hit a roadblock. TypeScript keeps showing me the error message 

Type '{ rippleColor: any; }' is not assignable to type 'ColorValue | null | undefined'
when I try to add the android_ripple color. How can I go about resolving this issue?

This is my component:

import { Pressable, Text, View } from "react-native";
const Button = ({
    rippleColor,
    }) => {
    return (
     <View>
      <Pressable
        disabled={disabled}
        android_ripple={{ color: { rippleColor }, borderless: true }} //this is where TypeScript throws an error
        onPress={onPress}
         >
        <Text>
          {text}
        </Text>
      </Pressable>
    </View>
  );
};
typescriptreact-nativeexpo

Answer №1

Make sure to specify types for the props that your component is receiving. The Pressable component is expecting a type of 'ColorValue | null | undefined', as indicated by TypeScript's feedback. Therefore, your props should be defined as follows: 

{ rippleColor: ColorValue | null | undefined }
.

In addition, it seems like there was an error in how you were passing the color parameter here: color: { rippleColor }. This syntax is equivalent to:

color: {
  rippleColor: rippleColor,
},

To correctly pass the entire prop as the color attribute, you should use color: rippleColor.

After making these adjustments, your complete component code should appear as shown below:

import { Pressable, Text, View } from "react-native";

type Props = {
  rippleColor: ColorValue | null | undefined;
};

const Button = ({
  rippleColor,
}: Props) => {
  return (
    <View>
      <Pressable
        disabled={disabled}
        android_ripple={{ color: rippleColor, borderless: true }}
        onPress={onPress}
      >
        <Text>
          {text}
        </Text>
      </Pressable>
    </View>
  );
};

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