What is it and how to pick it up?

Question

JavaScript

Hello. I had a package " material-ui": "1.0.0-beta.21".
I wanted to update it to beta-22, I did it . But I had problems with styles (the buttons are not raised and do not pull up color: "primary") PS Before that, everything was fine . I decided to go back, I did. I installed the previous package, to c ^ - The problem was not solved.The question is what does ^ mean and how can I install a new and correct packagenpm install [email protected]1.0.0-beta.22npm install [email protected]1.0.0-beta.21
"material-ui": "^1.0.0-beta.21"
"material-ui": "1.0.0-beta.21"

Answer 1

You now have two packages installed. See which one you are connecting. If so, you can remove the package like this -
npm uninstall [email protected] -D