Update react

npm install react-scripts@latest

Update react app

//NPM
npm install --save react@latest

//Yarn
yarn upgrade react@latest

Source: stackoverflow.com

How to update react app

//open terminal and run thsi code 
cd newreact
//where newreact is the old react app you created
//open package.json in text editor and change the version to latest
//open the same terminal gain and run this
npm install

React lifecycle hooks

class Content extends React.Component {
  // ...
  componentWillMount() {
    this.setState({ activities: data });
  }
  // ...
}

-1

Source: newline.co

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