redux-form/src/events/getValue.js

A higher order component decorator for forms using Redux and React

import isEvent from './isEvent';

const getSelectedValues = options => {
  const result = [];
  if (options) {
    for (let index = 0; index < options.length; index++) {
      const option = options[index];
      if (option.selected) {
        result.push(option.value);
      }
    }
  }
  return result;
};

const getValue = (event, isReactNative) => {
  if (isEvent(event)) {
    if (!isReactNative && event.nativeEvent && event.nativeEvent.text !== undefined) {
      return event.nativeEvent.text;
    }
    if (isReactNative && event.nativeEvent !== undefined) {
      return event.nativeEvent.text;
    }
    const {target: {type, value, checked, files}, dataTransfer} = event;
    if (type === 'checkbox') {
      return checked;
    }
    if (type === 'file') {
      return files || dataTransfer && dataTransfer.files;
    }
    if (type === 'select-multiple') {
      return getSelectedValues(event.target.options);
    }
    return value;
  }
  // not an event, so must be either our value or an object containing our value in the 'value' key
  return event && typeof event === 'object' && event.value !== undefined ?
    event.value : // extract value from { value: value } structure. https://github.com/nikgraf/belle/issues/58
    event;
};

export default getValue;