I created the app wiyh npx-create-app, yarn start workes well. But when I try to install React-bootstrap and marked with Yarn:
yarn add react-bootstrap bootstrap
yarn add marked
The modules doesn't appeared in the package.json file. Doesn't worked.
This is the console:
Then I tried with npm :
npm install react-bootstrap bootstrap
npm install marked
That's worked well.
Why that's doesn't work with yarn ? I tried also to make yarn install before but the console displayed "info No lockfile found". So I'm litle confused with yarn. What I have to do, in which order ?