Reactda massivdan tanlangan value atributlari

Faraz qilaylik, ro'yxat elementlari yana massivda saqlansin:

jsxfunction App() {
  const texts = ['text1', 'text2', 'text3', 'text4'];
  const [value, setValue] = useState('');
  
  ...
}

Keling, ushbu massiv yordamida option teglarini shakllantiramiz, ularga elementlarning value atribut qiymatlari sifatida qo'shamiz:

jsxfunction App() {
  const texts = ['text1', 'text2', 'text3', 'text4'];
  const [value, setValue] = useState('');
  
  const options = texts.map((text, index) => {
    return <option key={index} value={index}>{text}</option>;
  });
  
  ...
}

Shakllantirilgan teglardan foydalanib, ochiladigan ro'yxat yaratamiz:

jsxreturn <div>
  <select value={value} onChange={event => setValue(event.target.value)}>
    {options}
  </select>
</div>;

Tanlangan element raqamini abzatsda ko'rsatamiz:

jsxreturn <div>
  <select value={value} onChange={event => setValue(event.target.value)}>
    {options}
  </select>
  <p>
    sizning tanlovingiz: {value}
  </p>
</div>;

Endi esa tanlangan elementning matnini ko'rsatamiz, uning raqami va matnlar massividan foydalanib:

jsxreturn <div>
  <select value={value} onChange={event => setValue(event.target.value)}>
    {options}
  </select>
  <p>
    sizning tanlovingiz: {texts[value]}
  </p>
</div>;

Hammasini birlashtirib, quyidagi kodni olamiz:

jsxfunction App() {
  const texts = ['text1', 'text2', 'text3', 'text4'];
  const [value, setValue] = useState('');
  
  const options = texts.map((text, index) => {
    return <option key={index} value={index}>{text}</option>;
  });
  
  return <div>
    <select value={value} onChange={event => setValue(event.target.value)}>
      {options}
    </select>
    <p>
      sizning tanlovingiz: {texts[value]}
    </p>
  </div>;
}