react-native-use-modal

react-native-use-modal

A way to create a modal that is easy to reuse, easy to encapsulate, and returns the result as a promise.

The goal of react-native-use-modal is to make all the functions of react-native-modal available and convenient to use at the same time.

Feature

• Show modal and get result as promise
• Easy to show multiple modal continuously
• Pass parameters to modal when call show
• Get result data from modal when hide (as promise)
• modal encapsulation
• No need to explicitly place modal at component tree
• Fully customizable

Installation

yarn add react-native-use-modal

# or

npm i react-native-use-modal

Place ModalProvider at your app's root component

// App.tsx
import {ModalProvider} from 'react-native-use-modal';

const App = () => {
  return <ModalProvider>
    // ...
  </ModalProvider>;
};

If you are already using a different provider, make the ModalProvider a child of the other provider. Otherwise, the modal will not get the values broadcast by other providers.

import {Provider} from 'react-redux';

const App = () => {
  return (
    <Provider store={store}>
      <FooProvider>
        <BarProvider>
          <ModalProvider>
            // ...
          </ModalProvider>
        </BarProvider>
      </BarProvider>
    </Provider>
  );
};

Usage

Declare modal as hook with createUseModal

createUseModal function receives a functional component of the specified type as the first argument. This component will later be displayed as a modal.

// useSimpleModal.tsx
import {createUseModal} from 'react-native-use-modal';

// createUseModal creates a hook and returns it.
const useSimpleModal = createUseModal(
  ({
    confirm, // Call this function to finish (confirm) modal
    cancel, // Call this function to finish (cancel) modal
  }) => {
    // return react node to show as modal
    return (
      <View>
        /* any view to presentation */
        <Button onPress={confirm}>Ok</Button>
        <Button onPress={cancel}>Cancel</Button>
      </View>
    );
  },
);

Show modal using hook

..from any other react component

// FooView.tsx

const FooView = () => {
  // Call the hook you declared earlier
  // By calling the hook created with createUseModal, you can get an object that can display modal.
  const simpleModal = useSimpleModal();

  const handlePressButton = () => {
    // Show modal!
    // This returns a Promise<ModalResult>
    simpleModal.show();
  };
};

Handling the modal's result

You can wait for modal to return the result with await

// FooView.tsx
const handlePressButton = async () => {
  // Show modal!
  // This returns a Promise<ModalResult>
  const result = await simpleModal.show();
  if (result.type === ModalResultType.CONFIRM) {
    // handle confirm here
    // ...
  } else {
    // handle cancel here
    // ...
  }
};

Declare modal that require parameters

We sometimes need parameters to configure the modal.

createUseModal receives two generic types, the first is the type of data to be included in the result of modal, and the second is the type of parameter passed when calling modal.

If not used, just declare it as void type. The default is void.

// useAlertModal.tsx
import {createUseModal} from 'react-native-use-modal';

const useAlertModal = createUseModal<
  void, // Result data type. In this case it is not used, so it is void.
  {title: string; message: string} // Parameters type
  >(({confirm, cancel, param}) => { // Parameters are passed in props
  return (
    <View>
      <Title>{param.title}</Title>
      <Paragraph>{param.message}</Paragraph>
      <View>
        <Button onPress={confirm}>Ok</Button>
        <Button onPress={cancel}>Cancel</Button>
      </View>
    </View>
  );
});

Show modal that require parameters

// BarView.tsx
const BarView = () => {
  // Call the hook you declared earlier
  const alertModal = useAlertModal();

  const handlePressButton = () => {
    // Show modal!
    // This returns a Promise<ModalResult>
    alertModal.show({
      title: 'Title',
      message: 'Message',
    });
  };
};

Declare modal that return values

Sometimes we may want to return a result from Modal.

// Pass the result data type as the first Generic argument.
// In this case, no parameters are used, so the second generic argument does not need to be passed.
// Now, the confirm function passed as props receives the value of the data type declared as generic.
export const useTextInputModal = createUseModal<string>(({confirm, cancel}) => {
  const [value, setValue] = useState('');

  const handlePressConfirm = () => confirm(value);

  return (
    <View style={styles.container}>
      <TextInput
        value={value}
        onChangeText={setValue}
      />
      <View >
        <Button onPress={handlePressConfirm}>Confirm</Button>
        <Button onPress={cancel}>Cancel</Button>
      </View>
    </View>
  );
});

Handling the modal's result with value

// BazView.tsx
const BazView = () => {
  const textInputModal = useTextInputModal();

  const handlePressButton = async () => {
    // Show modal!
    // This returns a Promise<ModalResult<string>>
    const result = await textInputModal.show();
    if (result.type === ModalResultType.CONFIRM) {
      // handle confirm here
      // You can find the entered value in result
      console.log('entered: ' + result.data);
    } else {
      // handle cancel here
      // ...
    }
  };
};

Customize modal config

This package depends on react-native-modal and accept all its props. You can set this in the second argument of the createUseModal. For example, an animation could be set up like this:

export const useSimpleModal = createUseModal(
  ({confirm, cancel}) => {
    /* render here */
  },
  {
    modalProps: {
      animationIn: 'fadeIn',
      animationOut: 'fadeOut',
    },
  },
);

createUseModal supports all props, except for the isVisible property. We internally manage this property.

Make cancelable when press backdrop or back button

With these option, modal will cancel when press backdrop or back button. Each option can be set independently.

export const useSimpleModal = createUseModal(
  ({confirm, cancel}) => {
    /* render here */
  },
  {
    cancelOnBackButtonPress: true, // Default is false
    cancelOnBackdropPress: true, // Default is false
  },
);

Workflow example

You can clone this project and test examples by running the following command:

# iOS
yarn && yarn example ios
# Android
yarn && yarn example android

Examples provided are:

• Alert modal
• Simple modal
• Text input modal
• Show modal continuously

Contributing

See the contributing guide to learn how to contribute to the repository and the development workflow.

License

MIT