react-native-surveys/Forms/components/DatePicker/pureRender.js

Build your own forms, surveys and polls for your React Native apps.

export function shallowEqual(prev, next) {
  if (prev === next) return true;
  const prevKeys = Object.keys(prev);
  const nextKeys = Object.keys(next);
  if (prevKeys.length !== nextKeys.length) return false;
  return prevKeys.every(key => {
    return prev.hasOwnProperty(key) && prev[key] === next[key];
  });
}

function PureRender(Component) {
  Component.prototype.shouldComponentUpdate = function(nextProps, nextState) {
    return PureRender.shouldComponentUpdate(
      nextProps,
      nextState,
      this.props,
      this.state
    );
  };
}

PureRender.shouldComponentUpdate = function(
  nextProps,
  nextState,
  preProps,
  preState
) {
  return (
    !shallowEqual(preProps, nextProps) || !shallowEqual(preState, nextState)
  );
};

export default PureRender;