javascript - Select divs with the same attribute from an Jquery object -


i have grid of 6 divs attribute row nested equally between 2 divs attribute col. when page loads want randomly select 1 of rows , apply class .show, both divs row="1" 1 row. here, when document clicked want 1 of rows out of remaining 2 rows randomly selected , have class .show applied it. when document clicked again, last remaining row showed have .show applied it. 3 rows have class .show. if document clicked again visual cycle should restart 1 randomly selected div has class .show.

i have created jsfiddle code far. can't work out how select divs same row attribute.

<div id="cnt">     <div col=0>         <div row="0">0</div>         <div row="1">1</div>         <div row="2">2</div>     </div>     <div col=1>         <div row="0">0</div>         <div row="1">1</div>         <div row="2">2</div>     </div> </div>

js

$(document).ready(function() {  function selectdiv(){    var notselecteddivs = $("div[row]:not(.show)");     if(!notselecteddivs.length){        $('.show').removeclass('show');        notselecteddivs = $("div[row]:not(.show)");    }    var randomindex = math.floor((math.random() * 3));    $(notselecteddivs).attr('row', randomindex).addclass('show'); }   $(document).on("click", function() {     selectdiv(); }); selectdiv(); });

the divs rows can found using jquery selector [row=value]. random index: $('div[row=' + randomindex + ']')

quick example (upper bound rows hard coded example): fiddle

edit example implementation:

$(document).ready(function() {    let rowdivs = $('div[row]');    function selectdiv(){	      let notselecteddivs = rowdivs.not('.show');          if(!notselecteddivs.length)         notselecteddivs = rowdivs.removeclass('show');          var randomindex = notselecteddivs.get(math.floor((math.random() * notselecteddivs.length))).getattribute('row');     $('div[row=' + randomindex + ']').addclass('show');  }      $(document).on("click", function() {      selectdiv();  });  selectdiv();  });
#cnt {    display: flex;  }  div[row] {    width: 20px;    border: 1px solid black;  }  .show {    background-color: yellow;  }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <div id="cnt">          <div col=0>              <div row="0">0</div>              <div row="1">1</div>              <div row="2">2</div>          </div>          <div col=1>              <div row="0">0</div>              <div row="1">1</div>              <div row="2">2</div>          </div>      </div>


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