metrial ui

                                    import TextField from '@material-ui/core/TextField'

<TextField
                id="slots" 
                type="number"
                min={1}
                defaultValue="1"
                className="TextField pa2" 
                onChange={handleChange} 
                label="number of slots" 
                InputProps={{ 
                    inputProps: { min: 1} 
                 }}
                InputLabelProps = {{
                    shrink:true,
                }}/>

                                    yarn add @material-ui/core

npm install @material-ui/core

                                    $ npm install @material-ui/core

import React from 'react';
import { Button } from '@material-ui/core';

export default function App() {
  return <Button variant="contained" color="primary">Hello World</Button>
}