How can I disable underline in Material-UI without removing the selection in Autocomplete?

Question

I want to create Autocomplete with TextField component without underline. I have disabled underline using InputProps={{ disableUnderline: true }} in TextField props, it did its job, but it also removed the selection bar, so the question is, how can I accomplish this without removing the select bar?

Answer 1

To enable the dropdown list again, you need to spread all provided props in the nested property too (InputProps). So replace this line

<TextField {...params} InputProps={{ disableUnderline: true }} />

With:

<TextField {...params} InputProps={{ ...params.InputProps, disableUnderline: true }} />

Full working code:

<Autocomplete
  options={top100Films}
  getOptionLabel={(option) => option.title}
  style={{ width: 300 }}
  renderInput={(params) => (
    <TextField
      {...params}
      InputProps={{ ...params.InputProps, disableUnderline: true }}
      label="Combo box"
    />
  )}
/>

Live Demo