[openstreetmap/openstreetmap-website] Added color preview box in tag browser sidebar (#1779)

[Ilya Zverev]

Zverik commented on this pull request.



> @@ -188,4 +190,16 @@ def telephone_link(_key, value)
 
     "tel:#{value_no_whitespace}"
   end
+
+  def colour_preview(key, value)
+    return nil unless (key =~ /^(|building:|ref:|roof:)colour$/ || key =~ /^(int_)?ref:colour(_(bg|tx))?$/) && !value.nil?

Thanks for trying different options. The long regular expression looks interesting, but it is not future-proof. I'd propose to use `/^(?:.+:)?colour$/` so that only `colour` or `whatever:colour` tags are matched.

I don't like variants with more suffixes, like `colour_tx` — that will catch wrong tags like `:colour_pattern` or apply only to local non-discussed tagging. Leading underscores are only used only in undocumented rare tags, so let's look only for semicolons.

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