jquery - What are good ways for creating JSON to store checked checkbox options? -

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the code below creates json string checked response options. wanted link checked response options ids question ids , allow several response options included. if 2 options chosen json string looks {"question0":["options0","options1"]}. code below works, however, i'd know whether there more compact, cleaner ways want. code style ok or can improved? thanks

html layout

<div id="survey">     <div id="question0" class="question">enter question         <br>         <input id="options0" class="options-ready" type="checkbox">         <label class="opt-label">yes</label>         <br>         <input id="options1" class="options-ready" type="checkbox">         <label class="opt-label">no</label>         <br>     </div>     <div id="question1" class="question">enter question         <br>         <input id="options2" class="options-ready" type="checkbox">         <label class="opt-label">yes</label>         <br>         <input id="options3" class="options-ready" type="checkbox">         <label class="opt-label">no</label>         <br>         <input type='button' class='survey-submit' value='submit'>     </div> </div>

js code goes here: 

    $(function() {          $(".survey-submit").click(function () {                  function checked(target) {                      var arr = [];                      target.each(function () {                          if ($(this).prop("checked")) {                              arr.push($(this).attr("id"));                          } else {                              return null;                          }                      });                      return arr;                  }                  $(".question").each(function () {                      var obj = {};                      obj[$(this).attr("id")] = checked($(this).children(".options-ready"));                      var json = json.stringify(obj);                  }); }); });


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