mediawiki-extensions-Popups/resources/ext.popups/renderChangeListener.js

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( function ( mw ) {
/**
* Creates an instance of the render change listener.
*
* @return {ext.popups.ChangeListener}
*/
mw.popups.changeListeners.render = function () {
var preview;
return function ( prevState, state ) {
if ( state.preview.fetchResponse && !preview ) {
preview = mw.popups.renderer.render( state.preview.fetchResponse );
preview.show( state.preview.activeEvent );
} else if ( prevState && prevState.preview.fetchResponse ) {
preview.hide()
.done( function () {
preview = undefined;
} );
}
};
};
}( mediaWiki ) );