RESOLVED WONTFIX 52520
Number, date and other input elements using up/down control do not support placeholder text 
https://bugs.webkit.org/show_bug.cgi?id=52520
Summary Number, date and other input elements using up/down control do not support pl...
Adam M-W
Reported 2011-01-15 15:16:40 PST
Number, date and other input elements using up/down control do not support placeholder text e.g. <input type="date" placeholder="yyyy-mm-dd" /> will not display the placeholder text when it is supposed to. Standard text fields with type="text", type="tel" and type="email" work correctly.
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David Lowry
Comment 1 2011-06-03 06:29:41 PDT
Similar problem, related I image. Mac Snow Leopard / Safari (latest 5.0.5) when you use a number field (html5 input type) with a placeholder value and click the Spinner button, it miscalculates and outputs -1.7976931348623157e+308 (given placeholder of 4). This did not happen in Mac Chrome latest (as Chrome did not display the placeholder text). See exact code of the input box here —  http://pastie.org/2012693
Kent Tamura
Comment 2 2011-07-01 01:23:29 PDT
http://www.whatwg.org/specs/web-apps/current-work/multipage/the-input-element.html#input-type-attr-summary Some types have no placeholder support according to the standard. The standard was recently updated so that type=number supported placeholder. So we have added type=number support very recently.
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