This project was bootstrapped with Create React App.
In the project directory, you can run:
Runs the app in the development mode.
Open http://localhost:3000 to view it in the browser.
The page will reload if you make edits.
You will also see any lint errors in the console.
Launches the test runner in the interactive watch mode.
See the section about running tests for more information.
Builds the app for production to the build folder.
It correctly bundles React in production mode and optimizes the build for the best performance.
The build is minified and the filenames include the hashes.
Your app is ready to be deployed!
See the section about deployment for more information.
Note: this is a one-way operation. Once you eject, you can’t go back!
If you aren’t satisfied with the build tool and configuration choices, you can eject at any time. This command will remove the single build dependency from your project.
Instead, it will copy all the configuration files and the transitive dependencies (Webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except eject will still work, but they will point to the copied scripts so you can tweak them. At this point you’re on your own.
You don’t have to ever use eject. The curated feature set is suitable for small and middle deployments, and you shouldn’t feel obligated to use this feature. However we understand that this tool wouldn’t be useful if you couldn’t customize it when you are ready for it.
This project was bootstrapped with Create React App.
In the project directory, you can run:
Runs the app in the development mode.
Open http://localhost:3000 to view it in the browser.
The page will reload if you make edits.
You will also see any lint errors in the console.
Launches the test runner in the interactive watch mode.
See the section about running tests for more information.
Builds the app for production to the build folder.
It correctly bundles React in production mode and optimizes the build for the best performance.
The build is minified and the filenames include the hashes.
Your app is ready to be deployed!
See the section about deployment for more information.
Note: this is a one-way operation. Once you eject, you can’t go back!
If you aren’t satisfied with the build tool and configuration choices, you can eject at any time. This command will remove the single build dependency from your project.
Instead, it will copy all the configuration files and the transitive dependencies (Webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except eject will still work, but they will point to the copied scripts so you can tweak them. At this point you’re on your own.
You don’t have to ever use eject. The curated feature set is suitable for small and middle deployments, and you shouldn’t feel obligated to use this feature. However we understand that this tool wouldn’t be useful if you couldn’t customize it when you are ready for it.
First we need to render a feed of posts so we will need to create the PhotoFeed component. This will render only a <div> with a text inside.
// src/components/PhotoFeed.js
export default class PhotoFeed extends PureComponent {
render() {
return (
<div className="App-body">
PhotoFeed
</div>
);
}
}In our PhotoFeed component, we need to show all the posts passed throught props. On the render method we need to iterate through a list of Posts. Import the Photo component.
// src/components/PhotoFeed.js
import Photo from "./Photo";
import { Col, Row } from "antd";To render multiple items in React, we pass an array of React elements. The most common way to build that array is to map over your array of data. Let’s do that in the render method of PhotoFeed:
export default class PhotoFeed extends PureComponent {
render() {
const { posts, onLikeIncrement } = this.props;
return (
<div className="App-body">
<Row gutter={40}>
{posts.map((post) => (
<Col key={`col_${post.id}`} span={8}>
<Photo {...post} onLikeIncrement={onLikeIncrement} />
</Col>
))}
</Row>
</div>
);
}
}React components can have state by setting this.state in the constructor, which should be considered private to the component.
In this application the state is stored in the PhotoDetailsPage component and then passed to the children components via props.
Whenever this.setState is called, an update to the component is scheduled, causing React to merge in the passed state update and re-render the component along with its descendants.
// /src/components/Photo.js
{likes} <Icon type="heart" onClick={this._onClickLike} />On Photo component we need to add a callback _onClickLiketo the existing Icon component. The _onClickLike will call onLikeIncrement that is passed to Photo component via props by PhotoDetailsPage component, this function updates the posts that are stored in state and calls the setState function with the updated posts.
After this the Photo component will re-render with the updated number of likes.
Create a method called _onCommentChange that updates the state with the current form input value.
// src/routes/PhotoDetailsPage.js
_onCommentChange = (e) => {
this.setState({
value: e.target.value
});
};This value stored in state is then used when the user clicks the Submit button. The method _onSubmit is called and will add the comment object to an array of posts that is also stored in React state.
When the component re-renders, this.state.posts will have one more post and then the list will be updated.
Now we will want to create a new Route to enable us when clicking on a post to go to the details page.
// /src/app/App.js
<Route
path="/:postId"
component={PhotoDetailsPage}
/>We setup a Route in App component defining a path, in this case /:postId. This path parameter can be accessed by this.props.match.params.{nameOfTheParameter} and the component that should be rendered, in this case PhotoDetailsPage.
// /src/components/Photo.js
<Link to={`/${id}`}>
<Meta description={caption} />
</Link>Finally for each Photo component we need to add a Link that when clicked will change the route of our application to PhotoDetailsPage component.
You're at the end of your journey, and you've accomplished a lot. Congrats, You are awesome!
You can learn more in the Create React App documentation.
To learn React, check out the React documentation.
This section has moved here: https://facebook.github.io/create-react-app/docs/code-splitting
This section has moved here: https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size
This section has moved here: https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app
This section has moved here: https://facebook.github.io/create-react-app/docs/advanced-configuration
This section has moved here: https://facebook.github.io/create-react-app/docs/deployment
This section has moved here: https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify