Ukryj na polu tekstowym material-ui
<TextField
fullWidth
placeholder="Search..."
InputProps={{ disableUnderline: true }}
/>
Concerned Curlew
<TextField
fullWidth
placeholder="Search..."
InputProps={{ disableUnderline: true }}
/>
inputProps={{
underline: {
"&&&:before": {
borderBottom: "none"
},
"&&:after": {
borderBottom: "none"
}
}
}}