strapi/packages/strapi-admin/files/public/app/components/LeftMenuLink/index.js

/**
 *
 * LeftMenuLink
 *
 */

import React from 'react';
import styles from './styles.scss';
import { Link } from 'react-router';
import LeftMenuSubLinkContainer from 'components/LeftMenuSubLinkContainer';
import _ from 'lodash';

class LeftMenuLink extends React.Component { // eslint-disable-line react/prefer-stateless-function
  render() {
    let subLinksContainer;
    if (this.props.leftMenuLinks && this.props.leftMenuLinks.size) {
      subLinksContainer = (
        <LeftMenuSubLinkContainer
          subLinks={this.props.leftMenuLinks}
          destinationPrefix={this.props.destination}
        />
      );
    }

    // We need to create our own active url checker,
    // because of the two levels router.
    const isLinkActive = _.startsWith(window.location.pathname.replace('/admin', ''), this.props.destination);

    return (
      <li>
        <Link className={`${styles.link} ${isLinkActive ? styles.linkActive : ''}`} to={this.props.destination}>
          <i className={`${styles.linkIcon} fa-${this.props.icon} fa`}></i>
          <span className={styles.linkLabel}>{this.props.label}</span>
        </Link>
        {subLinksContainer}
      </li>
    );
  }
}

LeftMenuLink.propTypes = {
  icon: React.PropTypes.string,
  label: React.PropTypes.string,
  destination: React.PropTypes.string,
  isActive: React.PropTypes.bool,
  leftMenuLinks: React.PropTypes.object,
};

export default LeftMenuLink;