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A comment on Show HN: Select Star SQL, an interactive SQL book. Parent comment

Re:Show HN: Select Star SQL, an interactive SQL book by paulrd on Monday September 03, 2018 @11:03PM (#17906302)
I was wondering what you were talking about. What blue boxes? Then I saw the problem. The boxes showed up in Chromium but not Firefox.
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Re:Show HN: Select Star SQL, an interactive SQL book by bhrgunatha on Tuesday September 04, 2018 @12:07AM (#17906563)
Same here - the front matter page mentions web components - perhaps the support is different /disabled in Firefox?

The <sql-exercise data-question...> elements aren't visible in Firefox at all.

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