30-seconds-of-code/snippets/Select.md

title, tags, expertise, cover, firstSeen, lastUpdated

title	tags	expertise	cover	firstSeen	lastUpdated
Uncontrolled select element	components,input	beginner	blog_images/down-the-stream.jpg	2018-12-10T10:48:03+02:00	2020-11-25T20:46:35+02:00

Renders an uncontrolled <select> element that uses a callback function to pass its value to the parent component.

• Use the the selectedValue prop as the defaultValue of the <select> element to set its initial value..
• Use the onChange event to fire the onValueChange callback and send the new value to the parent.
• Use Array.prototype.map() on the values array to create an <option> element for each passed value.
• Each item in values must be a 2-element array, where the first element is the value of the item and the second one is the displayed text for it.

const Select = ({ values, onValueChange, selectedValue, ...rest }) => {
  return (
    <select
      defaultValue={selectedValue}
      onChange={({ target: { value } }) => onValueChange(value)}
      {...rest}
    >
      {values.map(([value, text]) => (
        <option key={value} value={value}>
          {text}
        </option>
      ))}
    </select>
  );
};

const choices = [
  ['grapefruit', 'Grapefruit'],
  ['lime', 'Lime'],
  ['coconut', 'Coconut'],
  ['mango', 'Mango'],
];
ReactDOM.render(
  <Select
    values={choices}
    selectedValue="lime"
    onValueChange={val => console.log(val)}
  />,
  document.getElementById('root')
);