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id	title	challengeType	forumTopicId	dashedName
5a24c314108439a4d403616e	Access Props Using this.props	6	301375	access-props-using-this-props

--description--

The last several challenges covered the basic ways to pass props to child components. But what if the child component that you're passing a prop to is an ES6 class component, rather than a stateless functional component? The ES6 class component uses a slightly different convention to access props.

Anytime you refer to a class component within itself, you use the this keyword. To access props within a class component, you preface the code that you use to access it with this. For example, if an ES6 class component has a prop called data, you write {this.props.data} in JSX.

--instructions--

Render an instance of the ReturnTempPassword component in the parent component ResetPassword. Here, give ReturnTempPassword a prop of tempPassword and assign it a value of a string that is at least 8 characters long. Within the child, ReturnTempPassword, access the tempPassword prop within the strong tags to make sure the user sees the temporary password.

--hints--

The ResetPassword component should return a single div element.

assert(
  (function () {
    const mockedComponent = Enzyme.mount(React.createElement(ResetPassword));
    return mockedComponent.children().type() === 'div';
  })()
);

The fourth child of ResetPassword should be the ReturnTempPassword component.

assert(
  (function () {
    const mockedComponent = Enzyme.mount(React.createElement(ResetPassword));
    return (
      mockedComponent.children().childAt(3).name() === 'ReturnTempPassword'
    );
  })()
);

The ReturnTempPassword component should have a prop called tempPassword.

assert(
  (function () {
    const mockedComponent = Enzyme.mount(React.createElement(ResetPassword));
    return mockedComponent.find('ReturnTempPassword').props().tempPassword;
  })()
);

The tempPassword prop of ReturnTempPassword should be equal to a string of at least 8 characters.

assert(
  (function () {
    const mockedComponent = Enzyme.mount(React.createElement(ResetPassword));
    const temp = mockedComponent.find('ReturnTempPassword').props()
      .tempPassword;
    return typeof temp === 'string' && temp.length >= 8;
  })()
);

The ReturnTempPassword component should display the password you create as the tempPassword prop within strong tags.

assert(
  (function () {
    const mockedComponent = Enzyme.mount(React.createElement(ResetPassword));
    return (
      mockedComponent.find('strong').text() ===
      mockedComponent.find('ReturnTempPassword').props().tempPassword
    );
  })()
);

--seed--

--after-user-code--

ReactDOM.render(<ResetPassword />, document.getElementById('root'))

--seed-contents--

class ReturnTempPassword extends React.Component {
  constructor(props) {
    super(props);

  }
  render() {
    return (
        <div>
            { /* Change code below this line */ }
            <p>Your temporary password is: <strong></strong></p>
            { /* Change code above this line */ }
        </div>
    );
  }
};

class ResetPassword extends React.Component {
  constructor(props) {
    super(props);

  }
  render() {
    return (
        <div>
          <h2>Reset Password</h2>
          <h3>We've generated a new temporary password for you.</h3>
          <h3>Please reset this password from your account settings ASAP.</h3>
          { /* Change code below this line */ }

          { /* Change code above this line */ }
        </div>
    );
  }
};

--solutions--

class ReturnTempPassword extends React.Component {
  constructor(props) {
    super(props);

  }
  render() {
    return (
        <div>
            <p>Your temporary password is: <strong>{this.props.tempPassword}</strong></p>
        </div>
    );
  }
};

class ResetPassword extends React.Component {
  constructor(props) {
    super(props);

  }
  render() {
    return (
        <div>
          <h2>Reset Password</h2>
          <h3>We've generated a new temporary password for you.</h3>
          <h3>Please reset this password from your account settings ASAP.</h3>
          { /* Change code below this line */ }
          <ReturnTempPassword tempPassword="serrPbqrPnzc" />
          { /* Change code above this line */ }
        </div>
    );
  }
};

4.4 KiB Raw Blame History