Maybe caused by cd3638bfa9d7f370bbdd18fd4106d5c60adc6ec8?

Maybe https://www.wikidata.org/wiki/MediaWiki:Gadget-Search.js needs an update?

I can confirm the error message.

Did the error already exist before 1.26wmf13?

When I disable the gadget Search the error also occurs. It seams to be independent from the gadget.

The problem is in repo/resources/wikibase.ui.entitysearch.js in extension Wikibase. Here the context gets removed:

$.removeData( input, 'suggestionsContext' );

I guess this problem is independent to cd3638bfa9d7f370bbdd18fd4106d5c60adc6ec8 and even occurred before 1.26wmf13.

Not a bug in a gadget.

removing search sprint for now - seems to be a JS issue, not necessarily something that we can fix on the backend.

Does it still happen? I couldn't reproduce.

I can still reproduce the error message in the JavaScript console.

TypeError: context is undefined

https://www.wikidata.org/w/resources/src/mediawiki/mediawiki.searchSuggest.js:305:6

Yep. This never stopped happening since I reported the bug two years ago.

I see, it happens only on firefox and not chrome.

It happens on Chrome too. It is easier to see if you have the following in your personal .js (or run it in the console before searching):

mw.trackSubscribe( 'global.error', function ( topic, err ) {
    if( err.errorMessage === 'TypeError: context is undefined' /* Firefox */
        || err.errorMessage === 'Script error.' /* Chrome*/
    ) {
        window.open( 'https://phabricator.wikimedia.org/T105637#3441049', '_blank' );
    }
} );

I can still reproduce the error message on Wikidata. Steps to reproduce:

• Load a page in WIkidata.
• Open JavaScript console and activate Preserve log.
• Enter something in the search bar and press Enter.

In the JavaScript console occurs

• TypeError: context is undefined (Firefox) or
• Uncaught TypeError: Cannot read property 'config' of undefined (Chrome)

before the next page gets loaded.

The error happens on https://www.wikidata.org/w/resources/src/mediawiki.searchSuggest/searchSuggest.js line 331.

@Fomafix Are You talking about the line where the attribute

numberOfResults

is defined ?
if yes could you please explain me , how it caused the bug because as far as i can see there is no problem there.

Obviously $searchInput.data( 'suggestionsContext' ) is undefined in this situation.

Yes thanks @Fomafix for the information. I considered a different line and confused with it earlier :(

Change 632221 had a related patch set uploaded (by Esanders; owner: Esanders):
[mediawiki/extensions/Wikibase@master] EntitySearch: Don't delete 'suggestionsContext' object

https://gerrit.wikimedia.org/r/632221

Change 632221 merged by jenkins-bot:
[mediawiki/extensions/Wikibase@master] EntitySearch: Don't delete 'suggestionsContext' object

https://gerrit.wikimedia.org/r/632221