@chainplatform/react-native-confirmation-code-field

A simple react-native confirmation code field compatible with iOS, Android and Web. Fork from https://github.com/retyui/react-native-confirmation-code-field

Links

• Documentation

Component features:

• 🔮 Simple and tiny 3.8 KB. Easy to use;
• 🚮 Clearing part of the code by clicking on the cell;
• 🍎 Support "fast paste SMS-code" on iOS. And custom code paste for Android;
• ⚡ TextInput ref support;
• 🛠 Highly customizable. Can be used as masked TextInput;
• 🤓 Readable changelog.

Install

yarn add @chainplatform/react-native-confirmation-code-field

How it works

I use an invisible <TextInput/> component that will be stretched over <Cell/> components.

JSX structure looks like that:

// Root view (rectangle with a red border on 3d visualization below)
<View style={rootStyle}>
  // Each Cell element is result of a `renderCell` function (gray boxes)
  <Cell>1</Cell>
  <Cell>2</Cell>
  <Cell>3</Cell>
  <Cell>|</Cell>
  <Cell></Cell>
  <Cell></Cell>
  // Invisible Text Input with absolute position (gray rectangle with text '123')
  <TextInput value="123"/>
</View>

It needs to solve next problems:

• When user pastes code from SMS on iOS issue#25
• Better UX when user types fast, or system sluggish, characters might lost when component switching focus between <TextInput/>.

Basic example

I took a minimal implementation approach. It mean that this component provides low-level functionality so you can create incredible UI without tears 😭. I recommend you start with creating your own wrapper where you apply all styles and basic configuration.

You can use a ready-made solution out of the box:

• Animated variant
• Formatting example
• Underline variant
• Show & Hide password
• Mask variant

import React, {useState} from 'react';
import {SafeAreaView, Text, StyleSheet} from 'react-native';

import {
  CodeField,
  Cursor,
  useBlurOnFulfill,
  useClearByFocusCell,
} from '@chainplatform/react-native-confirmation-code-field';

const styles = StyleSheet.create({
  root: {flex: 1, padding: 20},
  title: {textAlign: 'center', fontSize: 30},
  codeFieldRoot: {marginTop: 20},
  cell: {
    width: 40,
    height: 40,
    lineHeight: 38,
    fontSize: 24,
    borderWidth: 2,
    borderColor: '#00000030',
    textAlign: 'center',
  },
  focusCell: {
    borderColor: '#000',
  },
});

const CELL_COUNT = 6;

const App = () => {
  const [value, setValue] = useState('');
  const ref = useBlurOnFulfill({value, cellCount: CELL_COUNT});
  const [props, getCellOnLayoutHandler] = useClearByFocusCell({
    value,
    setValue,
  });

  return (
    <SafeAreaView style={styles.root}>
      <Text style={styles.title}>Verification</Text>
      <CodeField
        ref={ref}
        {...props}
        // Use `caretHidden={false}` when users can't paste a text value, because context menu doesn't appear
        value={value}
        onChangeText={setValue}
        cellCount={CELL_COUNT}
        rootStyle={styles.codeFieldRoot}
        keyboardType="number-pad"
        textContentType="oneTimeCode"
        autoComplete={Platform.select({ android: 'sms-otp', default: 'one-time-code' })}
        testID="my-code-input"
        renderCell={({index, symbol, isFocused}) => (
          <Text
            key={index}
            style={[styles.cell, isFocused && styles.focusCell]}
            onLayout={getCellOnLayoutHandler(index)}>
            {symbol || (isFocused ? <Cursor/> : null)}
          </Text>
        )}
      />
    </SafeAreaView>
  );
};

export default App;