Function parsePropDefs

src/preact/parse-props.js:167–279

* @param {typeof import('./base-element').PreactBaseElement} Ctor * @param {JsonObject} props * @param {AmpElementProps} propDefs * @param {Element} element * @param {?MediaQueryProps} mediaQueryProps

(Ctor, props, propDefs, element, mediaQueryProps)

 * @param {?MediaQueryProps} mediaQueryProps
 */
function parsePropDefs(Ctor, props, propDefs, element, mediaQueryProps) {
  // Match all children defined with "selector".
  if (checkPropsFor(propDefs, HAS_SELECTOR)) {
    // There are plain "children" and there're slotted children assigned
    // as separate properties. Thus in a carousel the plain "children" are
    // slides, and the "arrowNext" children are passed via a "arrowNext"
    // property.
    const elements = realChildElements(element);
    for (let i = 0; i < elements.length; i++) {
      const childElement = /** @type {HTMLElement} */ (elements[i]);
      const match = matchChild(childElement, propDefs);
      if (!match) {
        continue;
      }
      const def = propDefs[match];
      const {
        as = false,
        clone,
        name = match,
        props: slotProps = {},
        single,
      } = def;
      devAssert(clone || Ctor['usesShadowDom']);
      const parsedSlotProps = {};
      parsePropDefs(
        Ctor,
        parsedSlotProps,
        slotProps,
        childElement,
        mediaQueryProps
      );

      // TBD: assign keys, reuse slots, etc.
      if (single) {
        props[name] = createSlot(
          childElement,
          childElement.getAttribute('slot') || `i-amphtml-${name}`,
          parsedSlotProps,
          as
        );
      } else {
        const list = props[name] || (props[name] = []);
        devAssert(!as);
        list.push(
          clone
            ? createShallowVNodeCopy(childElement)
            : createSlot(
                childElement,
                childElement.getAttribute('slot') ||
                  `i-amphtml-${name}-${childIdGenerator()}`,
                parsedSlotProps
              )
        );
      }
    }
  }

  for (const name in propDefs) {