Lab 6: Passing Data to a Component

Objectives

• Create a reusable list component
• Pass data into a component property

Steps

Create a reusable list component

1. Create the file src\projects\ProjectList.js

2. Implement a ProjectList function component that meets the following specifications:

   1. Takes a projects array as a prop.
   2. Displays the projects array as a JSON string.

   src\projects\ProjectList.js

   import React from 'react';
   import { Project } from './Project';
   
   function ProjectList({ projects }) {
     return <pre>{JSON.stringify(projects, null, ' ')}</pre>;
   }
   
   export default ProjectList;

3. Define the property (prop) and its type using the prop-types library by doing the steps below.

   1. Open a command prompt (Windows) or Terminal (Mac) in the keep-track directory, and run the following command to install the prop-types library.

      npm install prop-types
   2. Add the following prop type definition.

   src\projects\ProjectList.js

   import React from 'react';
   + import PropTypes from 'prop-types';
   + import { Project } from './Project';
   
    function ProjectList({ projects }) {
      return <pre>{JSON.stringify(projects, null, ' ')}</pre>;
    }
   
   + ProjectList.propTypes = {
   +  projects: PropTypes.arrayOf(PropTypes.instanceOf(Project)).isRequired
   + };
   
   export default ProjectList;
   

Pass data into a component property

1. Modify src\projects\ProjectsPage.js to render the ProjectList component and pass it the MOCK_PROJECTS array instead of directly displaying the data.

   src\projects\ProjectsPage.js

   import React from 'react';
   import { MOCK_PROJECTS } from './MockProjects';
   + import ProjectList from './ProjectList';
   
   function ProjectsPage() {
     return (
       <>
         <h1>Projects</h1>
   -     <pre>{JSON.stringify(MOCK_PROJECTS, null, ' ')}</pre>
   +     <ProjectList projects={MOCK_PROJECTS} />
       </>
     );
   }
   
   export default ProjectsPage;
   

2. Verify the application is displaying the projects as it was in the last lab.

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✔ You have completed Lab 6