Function pushStartForm

packages/react-dom-bindings/src/server/ReactFizzConfigDOM.js:2291–2425

(
  target: Array<Chunk | PrecomputedChunk>,
  props: Object,
  resumableState: ResumableState,
  renderState: RenderState,
  formatContext: FormatContext,
)

}

function pushStartForm(
  target: Array<Chunk | PrecomputedChunk>,
  props: Object,
  resumableState: ResumableState,
  renderState: RenderState,
  formatContext: FormatContext,
): ReactNodeList {
  target.push(startChunkForTag('form'));

  let children = null;
  let innerHTML = null;
  let formAction = null;
  let formEncType = null;
  let formMethod = null;
  let formTarget = null;

  for (const propKey in props) {
    if (hasOwnProperty.call(props, propKey)) {
      const propValue = props[propKey];
      if (propValue == null) {
        continue;
      }
      switch (propKey) {
        case 'children':
          children = propValue;
          break;
        case 'dangerouslySetInnerHTML':
          innerHTML = propValue;
          break;
        case 'action':
          formAction = propValue;
          break;
        case 'encType':
          formEncType = propValue;
          break;
        case 'method':
          formMethod = propValue;
          break;
        case 'target':
          formTarget = propValue;
          break;
        default:
          pushAttribute(target, propKey, propValue);
          break;
      }
    }
  }

  let formData = null;
  let formActionName = null;
  if (typeof formAction === 'function') {
    // Function form actions cannot control the form properties
    if (__DEV__) {
      if (
        (formEncType !== null || formMethod !== null) &&
        !didWarnFormActionMethod
      ) {
        didWarnFormActionMethod = true;