How to use onchange with autocomplete material ui? - reactjs

Question

With the method handleChange is handled OnChange event of the Form Input with Hooks style that set the state off the object.
The handleChange function in turn calls setLocation which updates the location state with the new value.
To make user data entry easier, I decided to change the city field to an autocomplete, but I failed to capture the value of the autocomplete.
In the documentation he tells me that I need to pass two arguments but I can't understand very well
function(event: object, value: any) => void
event: The event source of the callback
value: null
How can I access the value of the field and put it into my function to insert the data?
<Autocomplete
style={{ width: 300 }}
value={location.City}
onChange={handleChange}
options={list.City}
classes={{
option: classes.option,
}}
autoHighlight
getOptionLabel={option => typeof option === 'string' ? option : option.City}
renderOption={option => (
<React.Fragment>
{option.City} -{option.State}
</React.Fragment>
)}
renderInput={params => (
<TextField {...params} label="City" value={location.City} margin="normal" variant="outlined" style={{ width: 220 }} inputProps={{
...params.inputProps,
autoComplete: 'disabled', // disable autocomplete and autofill
}}/>
)}
/>

Answer 1

If you're just trying to get the value of the input as the user types, you need to use onInputChange. The onChange handler runs when the user selects an option from the drop down.
export default function ComboBox() {
function handleInputChange(event, value) {
console.log(value);
}
return (
<Autocomplete
id="combo-box-demo"
options={top100Films}
getOptionLabel={(option: FilmOptionType) => option.title}
style={{ width: 300 }}
onInputChange={handleInputChange}
renderInput={params => (
<TextField {...params} label="Combo box" variant="outlined" fullWidth />
)}
/>
);
}
Codesandbox

Answer 2

the react SyntheticEvent set null target in an Asynchronous requests, try to use
event.persist()
on the event
https://reactjs.org/docs/events.html#event-pooling
const handleOnChangeText=(event)=> {
event.persist();
console.log(event)
let active = true;
setOpen(true);
if (!loading) {
return undefined;
}
(async () => {
const response = await fetch('https://country.register.gov.uk/records.json?page-size=5000');
await sleep(1e3); // For demo purposes.
const countries = await response.json();
if (active) {
setOptions(Object.keys(countries).map(key => countries[key].item[0]) as CountryType[]);
}
active = false;
})();
}
<Autocomplete
id="comboboxAsync"
disableOpenOnFocus
style={{ width: 300 }}
open={open}
onInputChange={handleOnChangeText}
...

Answer 3

Id is getting retrieved under this pattern: id-option-numberOfOption, that's why I had to split the retrieved value in order to update the state
const handleAutoCompleteChange = (event, value) => {
this.setState({ ...this.state, [event.target.id.split("-")[0]]: value });
console.log([event.target.id.split("-")[0]],value);
}

Answer 4

You can use mui-autocomplete npm its easy and less coding with more options(Like avatar view asynchronus calls).You should try it out. Here is the example for more info visit here.
[http://mui-autocomplete.com/home]
`import React from 'react';
import MuiAutocomplete from 'mui-autocomplete';
const cities = [
{
id: 1,
name: "Alabama",
code: "AL"
},
{
id: 2,
name: "Alaska",
code: "AK"
},
{
id: 3,
name: "American Samoa",
code: "AS"
}];
function Home () {
return (
<div>
<MuiAutocomplete
placeholder="Countries"
name="countries"
setvalue={1}
setdata={cities}
variant="outlined"
template={{
title: 'name'
}}
/>
</div>
);
}`