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mediawiki.action.view.redirect.js
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mediawiki.action.view.redirect.js
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/*!
* In general, MediaWiki does not ask browsers to resolve wiki page
* redirects client-side over HTTP. Instead, wiki page redirects are
* resolved server-side and rendered directly in response to a
* navigation.
*
* This script is responsible for:
*
* - Update the address bar to reflect the rendered destination.
*
* Given [[Foo]] redirecting to [[Bar]], when viewing [[Foo]]
* the server renders Bar content, with "Bar" as doc title
* and with "Bar" in the address bar.
*
* - For internal redirect destination that specify a fragment, if
* the navigation does not set its own fragment, scroll to the
* specified section.
*
* Given [[Foo]] redirecting to [[Bar#Foo]], the browser should
* scroll to "Foo", and render address bar Bar#Foo (not Foo, Bar,
* or Foo#Foo).
*
* Given [[Foo]] redirecting to [[Bar#Foo]], when navigating to
* [[Foo#Quux]], the address bar should reflect Bar#Quux, and
* let the native scroll happen, don't override scroll to #Foo.
*/
( function () {
'use strict';
let canonical = mw.config.get( 'wgInternalRedirectTargetUrl' );
if ( !canonical ) {
return;
}
let fragment = null;
if ( location.hash ) {
// Ignore redirect's own fragment and preserve fragment override in address
canonical = canonical.replace( /#.*$/, '' ) + location.hash;
} else {
const index = canonical.indexOf( '#' );
fragment = ( index !== -1 ) ? canonical.slice( index ) : null;
}
// Update address bar, including browser history.
// Preserve correct "Back"-button behaviour by using replaceState instead of
// pushState (or location.hash assignment)
history.replaceState( history.state, '', canonical );
if ( fragment ) {
// Specification for history.replaceState() doesn't require browser to scroll,
// so scroll to be sure (see also T110501).
const node = document.getElementById( fragment.slice( 1 ) );
if ( node ) {
node.scrollIntoView();
}
}
}() );

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