next-csrf/example/node_modules/ally.js/element/blur.js

CSRF mitigation library for Next.js

'use strict';

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

exports.default = function (context) {
  var element = (0, _contextToElement2.default)({
    label: 'element/blur',
    context: context
  });

  if (!(0, _activeElement2.default)(element)) {
    return null;
  }

  var nodeName = element.nodeName.toLowerCase();
  if (nodeName === 'body') {
    // prevent the browser window from losing focus in IE9
    // according to https://bugs.jqueryui.com/ticket/9420
    return null;
  }

  if (element.blur) {
    element.blur();
    return document.activeElement;
  }

  var _window = (0, _getWindow2.default)(element);

  try {
    // The element itself does not have a blur method.
    // This is true for SVG elements in Firefox and IE,
    // as well as MathML elements in every browser.
    // IE9 - 11 will let us abuse HTMLElement's blur method,
    // Firefox and Edge will throw an error.
    _window.HTMLElement.prototype.blur.call(element);
  } catch (e) {
    // if we're not in an HTML document, we don't have access to document.body
    var body = _window.document && _window.document.body;
    if (!body) {
      return null;
    }

    // we can't simply call document.body.focus() unless
    // we make sure the element actually is focusable
    var tabindex = body.getAttribute('tabindex');
    body.setAttribute('tabindex', '-1');
    body.focus();
    if (tabindex) {
      body.setAttribute('tabindex', tabindex);
    } else {
      body.removeAttribute('tabindex');
    }
  }

  return _window.document.activeElement;
};

var _activeElement = require('../is/active-element');

var _activeElement2 = _interopRequireDefault(_activeElement);

var _contextToElement = require('../util/context-to-element');

var _contextToElement2 = _interopRequireDefault(_contextToElement);

var _getWindow = require('../util/get-window');

var _getWindow2 = _interopRequireDefault(_getWindow);

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

// wrapper for HTMLElement.prototype.blur

module.exports = exports['default'];
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