How to use Default Text Support with valid HTML?

[brucek2]

When I start my single select list with <option></option>, the default text works as expected.

However, this HTML will no longer validate. The error is "Element option without attribute label must not be empty."

Is there a way to use the default text feature using only valid HTML syntax?

[DzmVasileusky]

Hi.
Adding label with one space helped for me
<option label=" " value=""></option>

[tractorcow]

Yep I've run into this issue as well.

@DzmVasileusky I tried your solution, but it doesn't work with allow_single_deselect (at least on the version of chosen I'm on).

[tractorcow]

Just a guess, but does

chosen/coffee/lib/abstract-chosen.coffee

Line 23 in dd269d4

@allow_single_deselect = if @options.allow_single_deselect? and @form_field.options[0]? and @form_field.options[0].text is "" then @options.allow_single_deselect else false

need to allow text = " " ?

[tractorcow]

I tested a fix locally, and changing the empty test from === "" to .match(/^\s*$/g) (only whitespace) in SelectParser.prototype.add_option and AbstractChosen.prototype.set_default_values seems to work ok. I can use   as a title for empty options, is html5 valid, and I get the expected behaviour from allow_single_deselect.

Now to learn coffeescript so I can PR this back....

tractorcow/silverstripe-framework@d5998fa

[JoeSimsen]

Are there any plans to pull above fix/something similar into this project? Would really like to have it as well.