Function updateProperties

packages/react-dom-bindings/src/client/ReactDOMComponent.js:1433–1938

(
  domElement: Element,
  tag: string,
  lastProps: Object,
  nextProps: Object,
)

}

export function updateProperties(
  domElement: Element,
  tag: string,
  lastProps: Object,
  nextProps: Object,
): void {
  if (__DEV__) {
    validatePropertiesInDevelopment(tag, nextProps);
  }

  switch (tag) {
    case 'div':
    case 'span':
    case 'svg':
    case 'path':
    case 'a':
    case 'g':
    case 'p':
    case 'li': {
      // Fast track the most common tag types
      break;
    }
    case 'input': {
      let name = null;
      let type = null;
      let value = null;
      let defaultValue = null;
      let lastDefaultValue = null;
      let checked = null;
      let defaultChecked = null;
      for (const propKey in lastProps) {
        const lastProp = lastProps[propKey];
        if (lastProps.hasOwnProperty(propKey) && lastProp != null) {
          switch (propKey) {
            case 'checked': {
              break;
            }
            case 'value': {
              // This is handled by updateWrapper below.
              break;
            }
            case 'defaultValue': {
              lastDefaultValue = lastProp;
            }
            // defaultChecked and defaultValue are ignored by setProp
            // Fallthrough
            default: {
              if (!nextProps.hasOwnProperty(propKey))
                setProp(domElement, tag, propKey, null, nextProps, lastProp);
            }
          }
        }
      }
      for (const propKey in nextProps) {
        const nextProp = nextProps[propKey];
        const lastProp = lastProps[propKey];
        if (
          nextProps.hasOwnProperty(propKey) &&