2 * JavaScript to update page URL when a redirect is viewed, ensuring that the
3 * page is scrolled to the id when it's a redirect with fragment.
5 * This is loaded in the top queue, so avoid unnecessary dependencies
6 * like mediawiki.Title or mediawiki.Uri.
9 var profile = $.client.profile(),
10 canonical = mw.config.get( 'wgInternalRedirectTargetUrl' ),
12 node, shouldChangeFragment, index;
14 index = canonical.indexOf( '#' );
16 fragment = canonical.slice( index );
19 // Never override the fragment if the user intended to look at a different section
20 shouldChangeFragment = fragment && !location.hash;
22 // Replace the whole URL if possible, otherwise just change the fragment
23 if ( canonical && history.replaceState ) {
24 if ( !shouldChangeFragment ) {
25 // If the current page view has a fragment already, don't override it
26 canonical = canonical.replace( /#.*$/, '' );
27 canonical += location.hash;
30 // Note that this will update the hash in a modern browser, retaining back behaviour
31 history.replaceState( /* data= */ history.state, /* title= */ document.title, /* url= */ canonical );
32 if ( shouldChangeFragment ) {
33 // Specification for history.replaceState() doesn't require browser to scroll,
34 // so scroll to be sure (see also T110501). Support for IE9 and IE10.
35 node = document.getElementById( fragment.slice( 1 ) );
37 node.scrollIntoView();
41 } else if ( shouldChangeFragment ) {
42 if ( profile.layout === 'webkit' && profile.layoutVersion < 420 ) {
43 // Released Safari w/ WebKit 418.9.1 messes up horribly
44 // Nightlies of 420+ are ok
48 location.hash = fragment;
51 if ( shouldChangeFragment && profile.layout === 'gecko' ) {
52 // Mozilla needs to wait until after load, otherwise the window doesn't
53 // scroll. See <https://bugzilla.mozilla.org/show_bug.cgi?id=516293>.
54 // There's no obvious way to detect this programmatically, so we use
55 // version-testing. If Firefox fixes the bug, they'll jump twice, but
56 // better twice than not at all, so make the fix hit future versions as
59 if ( location.hash === fragment ) {
60 location.hash = fragment;
65 }( mediaWiki, jQuery ) );