Working with a function in the stylesheet of TypeScript in React Native allows for dynamic styling

Question

Working with a function in the stylesheet of TypeScript in React Native allows for dynamic styling

When attempting to use variables in my StyleSheet file, I encounter a type error even though the UI works fine. Any suggestions on how to resolve this issue?

type buttonStyle = (height: number, width: string, color: string) => ViewStyle;

export type Styles = {
  button: buttonStyle;
};


export default StyleSheet.create<Styles>({
  button: (height: number, width: string, color: string) => ({
    height: height,
    width: width,
    backgroundColor: color,
    alignItems: 'center',
    justifyContent: 'center',
    borderRadius: 10,
  }),
});

The error message related to types is as follows:

Type 'Styles' does not satisfy the constraint 'NamedStyles<any> | NamedStyles<Styles>'.
  Type 'Styles' is not assignable to type 'NamedStyles<Styles>'.
    Types of property 'button' are incompatible.
      Type 'buttonStyle' is not assignable to type 'ViewStyle | TextStyle | ImageStyle

typescript react-native react-native-stylesheet

Answer 1

Answer №1

To define a constant style, you can use the StyleSheet.create() method outside of your component:

const customStyles = ((height: number, width: string, color: string)) => StyleSheet.create({
    btn: {
        height: height,
        width: width,
        backgroundColor: color,
        alignItems: 'center',
        justifyContent: 'center',
        borderRadius: 10,
    }
});

Then, you can apply this style in your component like so:

<Button style={customStyles(height, width, color).btn} />

Answer 2

To define a constant style, you can use the StyleSheet.create() method outside of your component:

const customStyles = ((height: number, width: string, color: string)) => StyleSheet.create({
    btn: {
        height: height,
        width: width,
        backgroundColor: color,
        alignItems: 'center',
        justifyContent: 'center',
        borderRadius: 10,
    }
});

Then, you can apply this style in your component like so:

<Button style={customStyles(height, width, color).btn} />

Answer 3

Answer №2

const styles = StyleSheet.create<CustomStyles | any>({
  customButton: (height: number, width: string, color: string) => ({
    height: height,
    width: width,
    backgroundColor: color,
    alignItems: 'center',
    justifyContent: 'center',
    borderRadius: 10,
  }),
});

Remember to include the any type, just like in this example.

StyleSheet.create<CustomStyles | any>

Answer 4

const styles = StyleSheet.create<CustomStyles | any>({
  customButton: (height: number, width: string, color: string) => ({
    height: height,
    width: width,
    backgroundColor: color,
    alignItems: 'center',
    justifyContent: 'center',
    borderRadius: 10,
  }),
});

Remember to include the any type, just like in this example.

StyleSheet.create<CustomStyles | any>

Answer 5

Answer №3

It appears that StyleSheet does not include a function type, so I have resolved this issue using the following method.

CSS file

import type { ViewStyle } from 'react-native';

const styles = {
  button: (height: number, width: string, color: string): ViewStyle => ({
    height: height,
    width: width,
    backgroundColor: color,
    alignItems: 'center',
    justifyContent: 'center',
    borderRadius: 10,
  }),
};

export default styles;

There is no requirement to specify the styles type explicitly.

Answer 6

It appears that StyleSheet does not include a function type, so I have resolved this issue using the following method.

CSS file

import type { ViewStyle } from 'react-native';

const styles = {
  button: (height: number, width: string, color: string): ViewStyle => ({
    height: height,
    width: width,
    backgroundColor: color,
    alignItems: 'center',
    justifyContent: 'center',
    borderRadius: 10,
  }),
};

export default styles;

There is no requirement to specify the styles type explicitly.

Working with a function in the stylesheet of TypeScript in React Native allows for dynamic styling

Answer №1

Answer №2

Answer №3

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