Function countChildren

docs/external/js/react.development.js:1298–1302

* Count the number of children that are typically specified as * `props.children`. * * See https://reactjs.org/docs/react-api.html#reactchildrencount * * @param {?*} children Children tree container. * @return {number} The number of children.

(children)

  function countChildren(children) {
    return traverseAllChildren(children, function () {
      return null;
    }, null);
  }
  /**
   * Flatten a children object (typically specified as `props.children`) and
   * return an array with appropriately re-keyed children.