Show/Hide individual items in radiogroup/checkbox/dropdown

Use itemvalue visibleIf property to show/hide individual items in radio group, checkbox and dropdown questions 

                        

    
        Survey.StylesManager.applyTheme("default");
    


var json = {
  questions: [
    {
      "type": "panel",
      "name": "contactinfo",
      "title": "Contact Information",
      "isRequired": true,
      "elements": [
        {
          "type": "text",
          "name": "email",
          "inputType":  "email",
          "title": "E-mail:"
        },
        {
          "type": "text",
          "name": "phone",
          "inputType":  "tel",
          "title": "Phone:"
        },
        {
          "type": "text",
          "name": "skype",
          "title": "Skype:"
        }
      ]
    },

    {
      type: "checkbox",
      name: "contactby",
      title: "How do you want us to contact you?",
      isRequired: true,
      "visibleIf": "{email} notempty or {phone} notempty or {phone} notempty",
      "colCount":  1,
      choices: [
        {
          "value": "email",
          "visibleIf": "{email} notempty",
          "text": "By e-mail"
        },
        {
          "value": "phone_voice",
          "visibleIf": "{phone} notempty",
          "text": "By phone (voice)"
        },
        {
          "value": "phone_sms",
          "visibleIf": "{phone} notempty",
          "text": "By phone (sms)"
        },
        {
          "value": "skype",
          "visibleIf": "{skype} notempty",
          "text": "By Skype"
        }
      ]
    }
  ]
};

window.survey = new Survey.Model(json);


    survey.onComplete.add(function(result) {
        document.querySelector('#surveyResult').textContent =
            "Result JSON:\n" + JSON.stringify(result.data, null, 3);
    });


survey.render("surveyElement");

;
                    
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