Change Details

**Steps to replicate the issue** (include links if applicable): * With some old browser (e.g. Firefox 68) Visit https://en.wikipedia.beta.wmflabs.org/wiki/Bert or https://commons.m.wikimedia.beta.wmflabs.org/wiki/User_talk:AJ/Sandbox4?withgadget=EditNoticesOnMobile&uselang=de#/editor/all * Loads e.g. https://commons.m.wikimedia.beta.wmflabs.org/w/load.php?lang=de&modules=ext.popups.icons,images,main|mediawiki.ui.checkbox&skin=minerva&version=13vh4 **What happens?**: SyntaxError: '#mw-content-text a[href][title]:not(.extiw, .mw-selflink, .image, .new, .internal, .external, .mw-cite-backlink a, .oo-ui-buttonedElement-button, .ve-ce-surface a, .cancelLink a)' is not a valid selector **What should have happened instead?**: Either change the selector or, if it's not important, fail gracefully **Other information** (browser name/version, screenshots, etc.): I regularly test code with an antique browser as code that works on an old browser tends to work fine on a modern browser as well, but not the other way around. Prevents me from accidentally using features that may not be widely supported. IIRC support for this style of CSS selector isn't quite ubiquitous yet.

**Steps to replicate the issue** (include links if applicable): * With some old browser (e.g. Firefox 68) Visit https://en.wikipedia.beta.wmflabs.org/wiki/Bert * Hover over `Bert's book` **What happens?**: SyntaxError: '#mw-content-text a[href][title]:not(.extiw, .mw-selflink, .image, .new, .internal, .external, .mw-cite-backlink a, .oo-ui-buttonedElement-button, .ve-ce-surface a, .cancelLink a)' is not a valid selector **What should have happened instead?**: No JS error # Developer notes I regularly test code with an antique browser as code that works on an old browser tends to work fine on a modern browser as well, but not the other way around. Prevents me from accidentally using features that may not be widely supported. IIRC support for this style of CSS selector isn't quite ubiquitous yet.

**Steps to replicate the issue** (include links if applicable): * With some old browser (e.g. Firefox 68) Visit https://en.wikipedia.beta.wmflabs.org/wiki/Bert or https://commons.m.wikimedia.beta.wmflabs.org/wiki/User_talk:AJ/Sandbox4?withgadget=EditNoticesOnMobile&uselang=de#/editor/all * Loads e.g. https://commons.m.wikimedia.beta.wmflabs.org/w/load.php?lang=de&modules=ext.popups.icons,images,main|mediawiki.ui.checkbox&skin=minerva&version=13vh4Hover over `Bert's book` **What happens?**: SyntaxError: '#mw-content-text a[href][title]:not(.extiw, .mw-selflink, .image, .new, .internal, .external, .mw-cite-backlink a, .oo-ui-buttonedElement-button, .ve-ce-surface a, .cancelLink a)' is not a valid selector **What should have happened instead?**: Either change the selector or, if it's not important, fail gracefullyNo JS error # Developer notes **Other information** (browser name/version, screenshots, etc.): I regularly test code with an antique browser as code that works on an old browser tends to work fine on a modern browser as well, but not the other way around. Prevents me from accidentally using features that may not be widely supported. IIRC support for this style of CSS selector isn't quite ubiquitous yet.