USER:ENTERPRISEY URL-SELECT-REVDEL.JS

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$( function () {

    if( mw.config.get( "wgAction" ) === "history" ) {

        mw.loader.using(  "mediawiki.util" ], function () {

            var param = mw.util.getParamValue( "revdel_select" );

            if( param ) {

                var pageHistory = document.getElementById( "pagehistory" );

                var oldids = param.split( "|" ).filter( Boolean );

                if( oldids.some( function ( oldid ) { return oldid.indexOf( ".." ) >= 0; } ) ) {

                    var allCheckboxes = Array.prototype.slice.call( pageHistory.querySelectorAll( "input[name^='ids[']" ) );

                }

                function expandRange ( range ) {

                    var start = range0],

                        end = range1],

                        startCheckbox = pageHistory.querySelector( "input[name='ids[" + start + "]']" ),

                        endCheckbox = pageHistory.querySelector( "input[name='ids[" + end + "]']" ),

                        startIdx = allCheckboxes.indexOf( startCheckbox ),

                        endIdx = allCheckboxes.indexOf( endCheckbox ),

                        checkboxes = [];

                    if( !startCheckbox ) throw( "No checkbox found for revision " + start );

                    if( !endCheckbox ) throw( "No checkbox found for revision " + end );

                    for( var idx = startIdx, inc = Math.sign( endIdx - startIdx );

                            idx != endIdx; idx += inc ) {

                        checkboxes.push( allCheckboxes idx  );

                    }

                    checkboxes.push( endCheckbox );

                    return checkboxes;

                }

                var singletonSelectors = [];

                function makeChecked( box ) { box.checked = true; }

                for( var i = 0, n = oldids.length; i < n; i++ ) {

                    if( oldidsi].indexOf( ".." ) >= 0 ) {

                        expandRange( oldidsi].split( ".." ) ).forEach( makeChecked );

                    } else {

                        singletonSelectors.push( "input[name='ids[" + oldidsi + "]']" );

                    }

                }

                if( singletonSelectors.length ) {

                    Array.prototype.slice.call( document.querySelectorAll(

                            singletonSelectors.join( "," ) ) ).forEach( makeChecked );

                }

            }

        } );

    }

} );

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