@bianic-ui/utils/dist/esm/dom.js

Common utilties and types for Bianic UI

var _window = undefined;
/**
 * Note: Accessing "window" in IE11 is somewhat expensive, and calling "typeof window"
 * hits a memory leak, whereas aliasing it and calling "typeof _window" does not.
 * Caching the window value at the file scope lets us minimize the impact.
 *
 * @see IE11 Memory Leak Issue https://github.com/microsoft/fluentui/pull/9010#issuecomment-490768427
 */

try {
  _window = window;
} catch (e) {
  /* no-op */
}
/**
 * Helper to get the window object. The helper will make sure to use a cached variable
 * of "window", to avoid overhead and memory leaks in IE11.
 */


export var getWindow = node => {
  var _node$ownerDocument$d, _node$ownerDocument;

  return (_node$ownerDocument$d = node == null ? void 0 : (_node$ownerDocument = node.ownerDocument) == null ? void 0 : _node$ownerDocument.defaultView) != null ? _node$ownerDocument$d : _window;
};
/**
 * Check if we can use the DOM. Useful for SSR purposes
 */

function checkIsBrowser() {
  var _window = getWindow();

  return Boolean(typeof _window !== "undefined" && _window.document && _window.document.createElement);
}

export var isBrowser = checkIsBrowser();
/**
 * Get the normalized event key across all browsers
 * @param event keyboard event
 */

export function normalizeEventKey(event) {
  var {
    key,
    keyCode
  } = event;
  var isArrowKey = keyCode >= 37 && keyCode <= 40 && key.indexOf("Arrow") !== 0;
  return isArrowKey ? "Arrow" + key : key;
}
export var dataAttr = condition => condition ? "" : undefined;
export var ariaAttr = condition => condition ? true : undefined;
export var getOwnerDocument = node => (node == null ? void 0 : node.ownerDocument) || document;
export var cx = function cx() {
  for (var _len = arguments.length, classNames = new Array(_len), _key = 0; _key < _len; _key++) {
    classNames[_key] = arguments[_key];
  }

  return classNames.filter(Boolean).join(" ");
};
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