import React, { useState } from 'react';
using useState:
const [val,setVal]=useState({})
changin value on click of button
const handleClick = () => {
setVal(top100Films[0]);//you pass any value from the array of top100Films
// set value in TextField from dropdown list
};
and pass this value to component in render
<Autocomplete
value={val}
options={top100Films}
getOptionLabel={option => option.title}
style={{ width: 300 }}
renderInput={params => (
<TextField
{...params}
label="Combo box"
variant="outlined"
fullWidth
/>
)}
/>