UriUtil.js
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UriUtil.js
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	/**
	* Compares the default Uri host, usually `window.location.host`, and `mw.Uri.host`. Equivalence
	* tests internal linkage, a mismatch may indicate an external link. Interwiki links are
	* considered external.
	*
	* This function only indicates internal in the sense of being on the same host or not. It has
	* no knowledge of [[Link]] vs [Link] links.
	*
	* On https://meta.wikimedia.org/wiki/Foo, the following links would be considered internal
	* and return `true`:
	*
	* https://meta.wikimedia.org/
	* https://meta.wikimedia.org/wiki/Bar
	* https://meta.wikimedia.org/w/index.php?title=Bar
	*
	* Similarly, the following links would be considered not internal and return `false`:
	*
	* https://archive.org/
	* https://foo.wikimedia.org/
	* https://en.wikipedia.org/
	* https://en.wikipedia.org/wiki/Bar
	*
	* @ignore
	* @param {mw.Uri} uri
	* @return {boolean}
	*/
	function isInternal( uri ) {
	try {
	// mw.Uri can throw exceptions (T264914, T66884)
	return uri.host === mw.Uri().host;
	} catch ( e ) {
	return false;
	}
	}

	module.exports = {
	isInternal
	};