special.undelete.loadMoreRevisions.js
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special.undelete.loadMoreRevisions.js
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	/*!
	* JavaScript for Special:Undelete when results exceed REVISION_HISTORY_LIMIT.
	*/
	( function () {
	'use strict';
	const $linkSpan = $( '#mw-load-more-revisions' );
	let $link = $( '<a>' );

	$link = $linkSpan.wrapAll( $link ).on( 'click', () => {
	// Get the URL of the last link in the list
	const urlString = $( '.mw-undelete-revlist li:last-child a' ).prop( 'href' );
	// Extract the timestamp
	const timestamp = mw.util.getParamValue( 'timestamp', urlString );
	const $oldList = $( '.mw-undelete-revlist' );
	const $spinner = $.createSpinner( { size: 'large', type: 'block' } );
	const path = mw.util.wikiScript() + '?' + $.param( {
	title: mw.config.get( 'wgPageName' ),
	target: mw.config.get( 'wgRelevantPageName' )
	} );

	$oldList.after( $spinner );

	$.ajax( {
	type: 'GET',
	url: path,
	dataType: 'html',
	data: {
	historyoffset: timestamp,
	action: 'render'
	},
	success: function ( data, status, jqXHR ) {
	$spinner.remove();
	const $newDoc = $.parseHTML( data );
	if ( !$newDoc.length ) {
	return;
	}
	const $newList = $( $newDoc[ 0 ] );
	$oldList.append( $newList.children() );
	if ( jqXHR.status !== 206 ) {
	$link.hide();
	}
	},
	error: function ( data, textStatus, errorMessage ) {
	$spinner.remove();
	$link.show();
	mw.log.error( errorMessage );
	}
	} );
	} );
	}() );