next-csrf/example/node_modules/ally.js/amd/get/shadow-host.js

CSRF mitigation library for Next.js

(/* istanbul ignore next */ function (global, factory) {
  if (typeof define === "function" && define.amd) {
    define(['module', 'exports', '../util/context-to-element'], factory);
  } else if (typeof exports !== "undefined") {
    factory(module, exports, require('../util/context-to-element'));
  } else {
    var mod = {
      exports: {}
    };
    factory(mod, mod.exports, global.contextToElement);
    global.shadowHost = mod.exports;
  }
})(this, function (module, exports, _contextToElement) {
  'use strict';

  Object.defineProperty(exports, "__esModule", {
    value: true
  });

  exports.default = function () {
    var _ref = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
        context = _ref.context;

    var element = (0, _contextToElement2.default)({
      label: 'get/shadow-host',
      context: context
    });

    // walk up to the root
    var container = null;

    while (element) {
      container = element;
      element = element.parentNode;
    }

    // https://developer.mozilla.org/en-US/docs/Web/API/Node.nodeType
    // NOTE: Firefox 34 does not expose ShadowRoot.host (but 37 does)
    if (container.nodeType === container.DOCUMENT_FRAGMENT_NODE && container.host) {
      // the root is attached to a fragment node that has a host
      return container.host;
    }

    return null;
  };

  var _contextToElement2 = _interopRequireDefault(_contextToElement);

  function _interopRequireDefault(obj) {
    return obj && obj.__esModule ? obj : {
      default: obj
    };
  }

  module.exports = exports['default'];
});
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