reactstrap/src/TabContent.js

import React, { Component } from 'react';
import PropTypes from 'prop-types';
import classNames from 'classnames';
import { TabContext } from './TabContext';
import { mapToCssModules, omit, tagPropType } from './utils';

const propTypes = {
  tag: tagPropType,
  activeTab: PropTypes.any,
  className: PropTypes.string,
  cssModule: PropTypes.object,
};

class TabContent extends Component {
  static getDerivedStateFromProps(nextProps, prevState) {
    if (prevState.activeTab !== nextProps.activeTab) {
      return {
        activeTab: nextProps.activeTab,
      };
    }
    return null;
  }

  constructor(props) {
    super(props);
    this.state = {
      activeTab: this.props.activeTab,
    };
  }

  render() {
    const { className, cssModule, tag: Tag = 'div' } = this.props;

    const attributes = omit(this.props, Object.keys(propTypes));

    const classes = mapToCssModules(
      classNames('tab-content', className),
      cssModule,
    );

    return (
      <TabContext.Provider value={{ activeTabId: this.state.activeTab }}>
        <Tag {...attributes} className={classes} />
      </TabContext.Provider>
    );
  }
}

export default TabContent;

TabContent.propTypes = propTypes;