Function createRef

docs/external/js/react.development.js:631–641

()

  // an immutable object with a single mutable value
  function createRef() {
    var refObject = {
      current: null
    };

    {
      Object.seal(refObject);
    }

    return refObject;
  }

  var hasOwnProperty$1 = Object.prototype.hasOwnProperty;
  var RESERVED_PROPS = {