isReferencePreviewsEnabled.js
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isReferencePreviewsEnabled.js
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	const { TYPE_REFERENCE } = require( './constants.js' );

	/**
	* @module isReferencePreviewsEnabled
	*/

	/**
	* Given the global state of the application, creates a function that gets
	* whether or not the user should have Reference Previews enabled.
	*
	* @param {mw.user} user The `mw.user` singleton instance
	* @param {Function} isPreviewTypeEnabled check whether preview has been disabled or enabled.
	* @param {mw.Map} config
	*
	* @return {boolean\|null} Null when there is no way the popup type can be enabled at run-time.
	*/
	function isReferencePreviewsEnabled( user, isPreviewTypeEnabled, config ) {
	if ( !config.get( 'wgCiteReferencePreviewsActive' ) ) {
	return null;
	}

	if ( user.isAnon() ) {
	return isPreviewTypeEnabled( TYPE_REFERENCE );
	}

	return true;
	}

	module.exports = isReferencePreviewsEnabled;