wisemapping-frontend/packages/login/src/Header.jsx

import React from 'react';
import { FormattedMessage } from 'react-intl'
import logo from './images/header-logo.png'

class Header extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      type: props.type
    };
  }

  render() {
    let signUpButton;
    let signInButton;
    let text;

    const pageType = this.state.type;
    if (pageType === 'only-signup') {
      text = <span className="header-area-content-span"><span><FormattedMessage id="header.donthaveaccount" defaultMessage="Don't have an account ?" /></span></span>;
      signUpButton = <SignUpButton className="header-area-right2" />;
    } else if (pageType === 'only-signin') {
      text = <span className="header-area-content-span"><span><FormattedMessage id="header.haveaccount" defaultMessage="Already have an account?" /></span></span>;
      signUpButton = <SignInButton className="header-area-right2" />;
    } else {
      signUpButton = <SignUpButton />
      signInButton = <SignInButton />;
    }

    return (
      <nav>
        <div className="header">
          <span className="header-logo"><a href="/"><img src={logo} alt="logo" /></a></span>
          {text}
          {signUpButton}
          {signInButton}
        </div>
      </nav>
    )
  };
}

const SignInButton = (props) => {
  return (
    <span className={`button-style1 ${props.className}`}>
        <a href="/c/login"><FormattedMessage id="login.signin" defaultMessage="Sign In" /></a>
    </span>);
}

const SignUpButton = (props) => {
  return (
    <span className={`button-style1 ${props.className}`}>
            <a href="/c/user/registration"><FormattedMessage id="login.signup" defaultMessage="Sign Up" /></a>
        </span>);
}

export default Header;