learn-co-students / react-props-movie-lab-dc-web-082718

React Props Movie Lab

Objectives

1. Practice passing props from parent components to children
2. Practice using default props
3. Practice jumping into and improving existing code

Introduction

This is a barebones React application used to showcase the nine greatest movies of all time. Your job is to update it so that it passes props from parent to children components correctly. In addition, you will implement default props so that 'bad/missing data' is properly handled - preventing our user interface from blowing up our visitors' computers

Following is the component tree. When fully rendered, there are 9 MovieCards rendered by MovieShowcase:

└── MovieShowcase
    │
    ├── MovieCard
    │   ├── CardFront
    │   └── CardBack
    │
    └── MovieCard
        ├── CardFront
        └── CardBack

MovieShowcase is the component that will house all of the 'raw' data associated with the movies we want to display. This data is located in src/data.js and is already being imported.

MovieCard components (which showcase a single movie) receive their individual movie information from MovieShowcase as four props: title, IMDBRating, genres, and poster. Following, the props are passed again to either CardFront or CardBack.

In our movie data set, we occasionally have missing data. This is where defaultProps come in and really pull our buns out of the fire. We will be handling all of our defaultProp'ing in MovieCard before they are passed down the chain to the front and back components.

Deliverables

MovieShowcase

1. .map over the imported movie data array and render MovieCards for each element. (see documentation)
2. Don't forget to pass all 4 props

MovieCard

1. defaultProps should be assigned in MovieCard for all four of the props:

• title receives an 'Unknown' string
• IMDBRating simply gets assigned to null
• genres should receive a value that will work with our CardBack component's rendering method for genres. The screen should read: 'No Genre(s) Found'
• poster should get the string default

2. pass the correct props to the correct back/front components (Note: the posterMap already takes care of converting a string into the appropriate poster asset)

CardFront

1. the prop should be used to apply a background image. This can be done inline via:

style={{backgroundImage: `url(${prop})`}}

CardBack

1. render the genres (as comma separated) strings
2. render the title value
3. Finish writing the method generateRatingElement, which should do the following:

• if the IMDBRating prop is null, return an <h4> with the contents 'No Rating Found'
• otherwise, return <img src={imgMapper[prop]} alt="" /> (using the correct prop)

Once Finished

npm start and make sure everything is functioning how you would like!

Resources

• React Default Prop Values

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