30 lines
1.1 KiB
JavaScript
30 lines
1.1 KiB
JavaScript
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import { canUseDOM } from './canUseDOM';
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var _window = undefined;
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// Note: Accessing "window" in IE11 is somewhat expensive, and calling "typeof window"
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// hits a memory leak, whereas aliasing it and calling "typeof _window" does not.
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// Caching the window value at the file scope lets us minimize the impact.
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try {
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// eslint-disable-next-line no-restricted-globals
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_window = window;
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}
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catch (e) {
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/* no-op */
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}
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/**
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* Helper to get the window object. The helper will make sure to use a cached variable
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* of "window", to avoid overhead and memory leaks in IE11. Note that in popup scenarios the
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* window object won't match the "global" window object, and for these scenarios, you should
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* pass in an element hosted within the popup.
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*
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* @public
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*/
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export function getWindow(rootElement) {
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if (!canUseDOM() || typeof _window === 'undefined') {
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return undefined;
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}
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else {
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var el = rootElement;
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return el && el.ownerDocument && el.ownerDocument.defaultView ? el.ownerDocument.defaultView : _window;
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}
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}
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//# sourceMappingURL=getWindow.js.map
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