Error
normalized_message
Unsupported time zone specified UTC
exception.trace
at module.exports.computed.lastEdited https://commons.wikimedia.org/w/load.php?lang=en&modules=jquery%2Cmediasearch&skin=vector&version=m27cs:198:657 at fn.get <anonymous>:327:628 at fn.evaluate <anonymous>:328:778 at null.lastEdited <anonymous>:330:682 at eval eval at Ya (unknown source), <anonymous>:8:160 at e._render <anonymous>:336:348 at r <anonymous>:369:746 at fn.get <anonymous>:327:628 at new fn <anonymous>:327:546
Impact
Currently one of the more frequently-occurring client-side errors in MediaSearch.
Notes
This error is being produced from the computed lastEdited property in PageResult.vue.
According to the MDN docs for Date.prototype.toLocaleString, locales and options for toLocaleString are not supported in all browsers. When a locale is not supported, a RangeError will be thrown.
This seems to be what is happening here. I assume that we're seeing these errors from legacy Android browsers that don't support the UTC timezone, which we're trying to use to format the dates displayed.
Adding a try/catch handler and simply displaying no lastEdited value to browsers that can't do the formatting seems like a reasonable solution here.