Unexplained behaviour in console

I have 2 console.log commands in the multiline firefox console and I execute them (cntrl+enter) . It looks like there is only 1 undefined return value but this value is either after the first log or the second log - ( I assume it is random or ‘asynchronous’ ). This is different from google Chrome.

Screenshot - 03_01_2021 , 09_58_16


Hello @joeking,

This looks like https://bugzilla.mozilla.org/show_bug.cgi?id=1681448 , which is now fixed in beta/DevEdition , and will be in release in ~3 weeks

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Ok, thanks - ‘…timestamp of the result message
might be the same as the one of the console api messages …’ <- That’s interesting from the bug report (still trying to grok the rest of the report, though). I read your page here - https://nicolaschevobbe.com/2019/01/17/webconsole-2018-retrospective.html . From my little understanding, is it true to say that the developer tools are made in ‘React’?

not all tools are built with React, but the console is (as well as the debugger, parts of the inspector, …)