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Editorial Team
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Asked: 2026-06-07T16:15:35+00:00

I must use rich:combobox to display a combo. In some cases I must add

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I must use rich:combobox to display a combo.
In some cases I must add an empty comboboxItem = new SelectItem("","").
This goes very well on IE8, Chrome, Safari.
It write   with FF and Opera.
Looking at the richfaces code I see the class ComboBoxBaseRenderer, method getItems with a strange piece of code: 

if("".equals(convertedValue)) {
 convertedValue = "\u00A0";
}

seems FF and Opera see \u00A0 as a real blank char and translate it into a blank space.
How could be solved this?

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1 Answer

  1. Editorial Team

    From a JavaScript point of view Opera and Firefox are right here.

    White space defined by ECMAScript 5.1, section 7.2

    \u0009  Tab <TAB>
\u000B  Vertical Tab    <VT>
\u000C  Form Feed   <FF>
\u0020  Space   <SP>
\u00A0  No-break space  <NBSP>
\uFEFF Other category “Zs” Byte Order Mark Any other Unicode “space separator”  <BOM> <USP>

    White space defined by HTML 4 (Deprecated)

    ASCII space (&#x0020;)
ASCII tab (&#x0009;)
ASCII form feed (&#x000C;)
Zero-width space (&#x200B;)

    Spaces characters defined by HTML5

    U+0020 SPACE, 
"tab" (U+0009), 
"LF" (U+000A), 
"FF" (U+000C), 
"CR" (U+000D).
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