jquery - Getting Check_Box to have a default value of nil with Bootstrap Switch -

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http://www.bootstrap-switch.org/examples.html

i'm using indeterminate switch (which keeps checkbox between true , false). issue switch defaults true.

basically want field submit nil unless user selects true or false.

jackson need?
same use toggles. 

<label>        <input type="checkbox" checked> checked  </label>  <br><br>  <label>        <input type="checkbox" unchecked> unchecked  </label>


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