React controlled value prop types

一、作用

二、检查受控值属性

export function checkControlledValueProps(
  tagName: string,
  props: Object,
): void {
  if (__DEV__) {
    if (
      !(
        hasReadOnlyValue[props.type] ||
        props.onChange ||
        props.onInput ||
        props.readOnly ||
        props.disabled ||
        props.value == null
      )
    ) {
      if (tagName === 'select') {
        console.error(
          'You provided a `value` prop to a form field without an ' +
            '`onChange` handler. This will render a read-only field. If ' +
            'the field should be mutable use `defaultValue`. Otherwise, set `onChange`.',
        );
      } else {
        console.error(
          'You provided a `value` prop to a form field without an ' +
            '`onChange` handler. This will render a read-only field. If ' +
            'the field should be mutable use `defaultValue`. Otherwise, set either `onChange` or `readOnly`.',
        );
      }
    }

    if (
      !(
        props.onChange ||
        props.readOnly ||
        props.disabled ||
        props.checked == null
      )
    ) {
      console.error(
        'You provided a `checked` prop to a form field without an ' +
          '`onChange` handler. This will render a read-only field. If ' +
          'the field should be mutable use `defaultChecked`. Otherwise, ' +
          'set either `onChange` or `readOnly`.',
      );
    }
  }
}

三、常量

1. 只读值

const hasReadOnlyValue = {
  button: true,
  checkbox: true,
  image: true,
  hidden: true,
  radio: true,
  reset: true,
  submit: true,
};