Reactda Inputlarni Ob'ektga Bog'lash

Holatda ob'ekt saqlansin:

const initObj = {
	prop1: 'value1',
	prop2: 'value2',
	prop3: 'value3',
}

function App() {
	const [obj, setObj] = useState(initObj);
	
	return <div>
		{obj.prop1}-{obj.prop2}-{obj.prop3}
	</div>;
}

Keling, ob'ektimizning har bir xususiyatini alohida inputda chiqaramiz:

function App() {
	const [obj, setObj] = useState(initObj);
	
	return <div>
		<input value={obj.prop1} />
		<input value={obj.prop2} />
		<input value={obj.prop3} />
		
		<br />
		{obj.prop1}-{obj.prop2}-{obj.prop3}
	</div>;
}

Keling, endi har bir inputga onChange hodisasini bog'laymiz. Boshqaruvchi sifatida bitta umumiy funktsiyani tayinlaymiz:

function App() {
	const [obj, setObj] = useState(initObj);
	
	return <div>
		<input value={obj.prop1} onChange={event => handleChange('prop1', event)} />
		<input value={obj.prop2} onChange={event => handleChange('prop2', event)} />
		<input value={obj.prop3} onChange={event => handleChange('prop3', event)} />
		
		<br />
		{obj.prop1}-{obj.prop2}-{obj.prop3}
	</div>;
}

Ko'rib turganingizdek, handleChange funktsiyasi birinchi parametr sifatida mos keladigan ob'ekt xususiyatining nomini qabul qiladi.

Keling, funktsiyamizning realizatsiyasini yozamiz:

function handleChange(prop, event) {
	const copy = Object.assign({}, obj);
	copy[prop] = event.target.value;
	setObj(copy);
}

Ushbu realizatsiya ishlaydi, lekin uni soddalashtirish mumkin, agar ob'ekt xususiyatlarining hisoblanadigan nomlaridan foydalansak:

function handleChange(prop, event) {
	setObj({...obj, ...{[prop]: event.target.value}});
}

Keling, butun kodni birga jamlaymiz:

function App() {
	const [obj, setObj] = useState(initObj);
	
	function handleChange(prop, event) {
		setObj({...obj, ...{[prop]: event.target.value}});
	}
	
	return <div>
		<input value={obj.prop1} onChange={event => handleChange('prop1', event)} />
		<input value={obj.prop2} onChange={event => handleChange('prop2', event)} />
		<input value={obj.prop3} onChange={event => handleChange('prop3', event)} />
		
		<br />
		{obj.prop1}-{obj.prop2}-{obj.prop3}
	</div>;
}

Holatda sana ob'ekti saqlansin:

const initDate = {
	year:  2025,
	month: 12,
	day:   31,
}

Holatda saqlanayotgan sanadan yil, oy va kunni, shuningdek, unga mos keladigan hafta kunini abzatsda chiqaring.

Oldingi vazifani sanani tahrirlash uchun uchta input qo'shib o'zgartiring.