freeCodeCamp/curriculum/challenges/english/03-front-end-libraries/react/access-props-using-this.props.english.md

id	title	challengeType	isRequired	forumTopicId
5a24c314108439a4d403616e	Access Props Using this.props	6	false	301375

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.

Tests

tests:
  - text: The <code>ResetPassword</code> component should return a single <code>div</code> element.
    testString: assert((function() { const mockedComponent = Enzyme.mount(React.createElement(ResetPassword)); return mockedComponent.children().type() === 'div'; })());
  - text: The fourth child of <code>ResetPassword</code> should be the <code>ReturnTempPassword</code> component.
    testString: assert((function() { const mockedComponent = Enzyme.mount(React.createElement(ResetPassword)); return mockedComponent.children().childAt(3).name() === 'ReturnTempPassword'; })());
  - text: The <code>ReturnTempPassword</code> component should have a prop called <code>tempPassword</code>.
    testString: assert((function() { const mockedComponent = Enzyme.mount(React.createElement(ResetPassword)); return mockedComponent.find('ReturnTempPassword').props().tempPassword; })());
  - text: The <code>tempPassword</code> prop of <code>ReturnTempPassword</code> should be equal to a string of at least <code>8</code> characters.
    testString: assert((function() { const mockedComponent = Enzyme.mount(React.createElement(ResetPassword)); const temp = mockedComponent.find('ReturnTempPassword').props().tempPassword; return typeof temp === 'string' && temp.length >= 8; })());
  - text: The <code>ReturnTempPassword</code> component should display the password you create as the <code>tempPassword</code> prop within <code>strong</code> tags.
    testString: assert((function() { const mockedComponent = Enzyme.mount(React.createElement(ResetPassword)); return mockedComponent.find('strong').text() === mockedComponent.find('ReturnTempPassword').props().tempPassword; })());

Challenge Seed

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>
    );
  }
};

After Test

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

Solution

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>
    );
  }
};