Function validateChildKeys

docs/external/js/react.development.js:1837–1873

* Ensure that every element either is passed in a static location, in an * array with an explicit keys property defined, or in an object literal * with valid key property. * * @internal * @param {ReactNode} node Statically passed child of any type. * @param {*} parentType node's pa

(node, parentType)

  function validateChildKeys(node, parentType) {
    if (typeof node !== 'object') {
      return;
    }

    if (Array.isArray(node)) {
      for (var i = 0; i < node.length; i++) {
        var child = node[i];

        if (isValidElement(child)) {
          validateExplicitKey(child, parentType);
        }
      }
    } else if (isValidElement(node)) {
      // This element was passed in a valid location.
      if (node._store) {
        node._store.validated = true;
      }
    } else if (node) {
      var iteratorFn = getIteratorFn(node);

      if (typeof iteratorFn === 'function') {
        // Entry iterators used to provide implicit keys,
        // but now we print a separate warning for them later.
        if (iteratorFn !== node.entries) {
          var iterator = iteratorFn.call(node);
          var step;

          while (!(step = iterator.next()).done) {
            if (isValidElement(step.value)) {
              validateExplicitKey(step.value, parentType);
            }
          }
        }
      }
    }
  }
  /**
   * Given an element, validate that its props follow the propTypes definition,
   * provided by the type.