Create React apps with no build configuration.
These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.
npm install axios
create react app
cd into /folderName
npm start
Visit http://localhost:3000/
A small code snippet of creating the Task component
Making the API request with axios
getArticleIds() {
axios({
url: '/topstories.json',
baseURL: 'https://hacker-news.firebaseio.com/v0',
responseType: 'json'
}).then((response) => {
if (!response.data) {
console.log("response lacking data", response);
return;
}
console.log('Received list of top stories. Total items in list: ' + response.data.length);
this.setState({ articleIds: response.data });
this.getArticlesDetails();
});
}
After creation, your project should look like this:
my-app/
README.md
node_modules/
package.json
public/
index.html
favicon.ico
src/
App.css
App.js
App.test.js
index.css
index.js
logo.svg
In the project directory, you can run:
npm start
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.
npm test
Launches the test runner in the interactive watch mode.
See the section about running tests for more information.
npm run build
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.
Finally, you will need to install some packages *globally*:
npm install -g eslint-config-react-app@0.3.0 eslint@3.8.1 babel-eslint@7.0.0 eslint-plugin-react@6.4.1 eslint-plugin-import@2.0.1 eslint-plugin-jsx-a11y@2.2.3 eslint-plugin-flowtype@2.21.0
## Hackernews API
n partnership with Firebase, we're making the public Hacker News data available in near real time. Firebase enables easy access from Android, iOS and the web. Servers aren't left out.
If you can use one of the many Firebase client libraries you really should. The libraries handle networking efficiently and can raise events when things change. Be sure to check them out.
Please email api@ycombinator.com if you find any bugs.
## Installing a Dependency
The generated project includes React and ReactDOM as dependencies. It also includes a set of scripts used by Create React App as a development dependency. You may install other dependencies (for example, React Router) with `npm`:
npm install –save
## Importing a Component
This project setup supports ES6 modules thanks to Babel.<br>
While you can still use `require()` and `module.exports`, we encourage you to use [`import` and `export`](http://exploringjs.com/es6/ch_modules.html) instead.
For example:
### `Button.js`
```js
import React, { Component } from 'react';
class Button extends Component {
render() {
// ...
}
}
export default Button; // Don’t forget to use export default!
This project setup uses Webpack for handling all assets. Webpack offers a custom way of “extending” the concept of import
beyond JavaScript. To express that a JavaScript file depends on a CSS file, you need to import the CSS from the JavaScript file:
Button.css
.Button {
padding: 20px;
}
With Webpack, using static assets like images and fonts works similarly to CSS.
You can import
an image right in a JavaScript module. This tells Webpack to include that image in the bundle. Unlike CSS imports, importing an image or a font gives you a string value. This value is the final image path you can reference in your code.
Here is an example:
import React from 'react';
import logo from './logo.png'; // Tell Webpack this JS file uses this image
console.log(logo); // /logo.84287d09.png
function Header() {
// Import result is the URL of your image
return <img src={logo} alt="Logo" />;
}
export default Header;
This ensures that when the project is built, Webpack will correctly move the images into the build folder, and provide us with correct paths.
This works in CSS too:
.Logo {
background-image: url(./logo.png);
}
Webpack finds all relative module references in CSS (they start with ./
) and replaces them with the final paths from the compiled bundle. If you make a typo or accidentally delete an important file, you will see a compilation error, just like when you import a non-existent JavaScript module. The final filenames in the compiled bundle are generated by Webpack from content hashes. If the file content changes in the future, Webpack will give it a different name in production so you don’t need to worry about long-term caching of assets.
Please be advised that this is also a custom feature of Webpack.