Bug 205600 – Web Inspector: Console clearing on reload or .clear() calls can happen after contents are logged

• Status: NEW
• Component: Web Inspector

[Jonathan Deutsch]

A clear of the console, either from a page reload or from a console.clear() call doesn't happen immediately. Instead there can be a race between when contents are logged and when the console is cleared. The end result is that logs go missing!

This can be easily demonstrated with code like:

====
<script>
console.clear();
console.log("hello world");
</script>
====

The reload case is a little harder to reproduce, but can happen in situations like a local web server or file:/// URL where the page comes in very quickly.  If you just have an HTML page like:

====
<script>
console.log("hello world");
</script>
====

And hit Command-R a lot of times, you'll probably wind up with a blank console.

I've attached these two test cases.

This does not affect Chrome.

[Jonathan Deutsch]

Created attachment 386426 [details]
Simple case where command-r to reload may not show console.log

[Jonathan Deutsch]

Created attachment 386427 [details]
console.clear and subsequent console.log won't be seen