в основном пытается создать функцию автозаполнения для механизма бронирования, код которого находится в компонентах класса, хотите преобразовать его в функциональный компонент с помощью React Hooks.Have пытался преобразовать, но мой код показывает несколько предупреждений. Можно предоставить любые фрагменты кода, если необходимо. (как конвертировать this.state и деструктурировать ключевое слово this)
import React, {Component, Fragment} из "act "; импортировать PropTypes из "prop-types";
class AutocompleteClass extends Component {
static propTypes = {
suggestions: PropTypes.instanceOf(Array)
};
static defaultProps = {
suggestions: []
};
constructor(props) {
super(props);
this.state = {
// The active selection's index
activeSuggestion: 0,
// The suggestions that match the user's input
filteredSuggestions: [],
// Whether or not the suggestion list is shown
showSuggestions: false,
// What the user has entered
userInput: ""
};
}
onChange = e => {
const { suggestions } = this.props;
const userInput = e.currentTarget.value;
// Filter our suggestions that don't contain the user's input
const filteredSuggestions = suggestions.filter(
suggestion =>
suggestion.toLowerCase().indexOf(userInput.toLowerCase()) > -1
);
this.setState({
activeSuggestion: 0,
filteredSuggestions,
showSuggestions: true,
userInput: e.currentTarget.value
});
};
onClick = e => {
this.setState({
activeSuggestion: 0,
filteredSuggestions: [],
showSuggestions: false,
userInput: e.currentTarget.innerText
});
};
onKeyDown = e => {
const { activeSuggestion, filteredSuggestions } = this.state;
// User pressed the enter key
if (e.keyCode === 13) {
this.setState({
activeSuggestion: 0,
showSuggestions: false,
userInput: filteredSuggestions[activeSuggestion]
});
}
// User pressed the up arrow
else if (e.keyCode === 38) {
if (activeSuggestion === 0) {
return;
}
this.setState({ activeSuggestion: activeSuggestion - 1 });
}
// User pressed the down arrow
else if (e.keyCode === 40) {
if (activeSuggestion - 1 === filteredSuggestions.length) {
return;
}
this.setState({ activeSuggestion: activeSuggestion + 1 });
}
};
render() {
const {
onChange,
onClick,
onKeyDown,
state: {
activeSuggestion,
filteredSuggestions,
showSuggestions,
userInput
}
} = this;
let suggestionsListComponent;
if (showSuggestions && userInput) {
if (filteredSuggestions.length) {
suggestionsListComponent = (
<ul class="suggestions">
{filteredSuggestions.map((suggestion, index) => {
let className;
// Flag the active suggestion with a class
if (index === activeSuggestion) {
className = "suggestion-active";
}
return (
<li className={className} key={suggestion} onClick={onClick}>
{suggestion}
</li>
);
})}
</ul>
);
} else {
suggestionsListComponent = (
<div class="no-suggestions">
<em>No suggestions, you're on your own!</em>
</div>
);
}
}
return (
<Fragment>
<input
type="text"
onChange={onChange}
onKeyDown={onKeyDown}
value={userInput}
/>
{suggestionsListComponent}
</Fragment>
);
}
}
export default AutocompleteClass;