Creating a dynamic grid of divs with Javascript

Question

I want to create a grid of HTML divs that will have the same number of rows and columns but with the number of rows/columns being based on a particular number that would be passed to the Javascript function.

e.g. if the number is 3 the grid will be 3 rows and 3 columns

if the number is 4 the grid will be 4 rows and 4 columns..etc

in the case of 3 the outputted code would need to look something like:

<div class="row">
  <div class="gridsquare">1</div>
  <div class="gridsquare">2</div>
  <div class="gridsquare">3</div>
</div>
<div class="row">
  <div class="gridsquare">4</div>
  <div class="gridsquare">5</div>
  <div class="gridsquare">6</div>
</div>
<div class="row">
  <div class="gridsquare">7</div>
  <div class="gridsquare">8</div>
  <div class="gridsquare">9</div>
</div>

What is a good way of iterating through javascript so that the correct elements can be identified to add the row div opening or closing tags (?)

Chris Gessler · Accepted Answer · 2012-06-18 13:47:22Z

Something along these lines should work for ya.

<html><head> 
  <script language="javascript"> 
    function genDivs(v){ 
      var e = document.body; // whatever you want to append the rows to: 
      for(var i = 0; i < v; i++){ 
        var row = document.createElement("div"); 
        row.className = "row"; 
        for(var x = 1; x <= v; x++){ 
            var cell = document.createElement("div"); 
            cell.className = "gridsquare"; 
            cell.innerText = (i * v) + x;
            row.appendChild(cell); 
        } 
        e.appendChild(row); 
      } 
      document.getElementById("code").innerText = e.innerHTML;

    }
  </script> 
</head> 
<body> 
    <input type="button" onclick="genDivs(6)" value="click me"> 
    <code id="code"></code>
</body> 
</html>

Results:

  <div class="row">
    <div class="gridsquare">
      1
    </div>

    <div class="gridsquare">
      2
    </div>

    <div class="gridsquare">
      3
    </div>

    <div class="gridsquare">
      4
    </div>

    <div class="gridsquare">
      5
    </div>

    <div class="gridsquare">
      6
    </div>
  </div>

  <div class="row">
    <div class="gridsquare">
      7
    </div>

    <div class="gridsquare">
      8
    </div>

    <div class="gridsquare">
      9
    </div>

    <div class="gridsquare">
      10
    </div>

    <div class="gridsquare">
      11
    </div>

    <div class="gridsquare">
      12
    </div>
  </div>

  <div class="row">
    <div class="gridsquare">
      13
    </div>

    <div class="gridsquare">
      14
    </div>

    <div class="gridsquare">
      15
    </div>

    <div class="gridsquare">
      16
    </div>

    <div class="gridsquare">
      17
    </div>

    <div class="gridsquare">
      18
    </div>
  </div>

  <div class="row">
    <div class="gridsquare">
      19
    </div>

    <div class="gridsquare">
      20
    </div>

    <div class="gridsquare">
      21
    </div>

    <div class="gridsquare">
      22
    </div>

    <div class="gridsquare">
      23
    </div>

    <div class="gridsquare">
      24
    </div>
  </div>

  <div class="row">
    <div class="gridsquare">
      25
    </div>

    <div class="gridsquare">
      26
    </div>

    <div class="gridsquare">
      27
    </div>

    <div class="gridsquare">
      28
    </div>

    <div class="gridsquare">
      29
    </div>

    <div class="gridsquare">
      30
    </div>
  </div>

  <div class="row">
    <div class="gridsquare">
      31
    </div>

    <div class="gridsquare">
      32
    </div>

    <div class="gridsquare">
      33
    </div>

    <div class="gridsquare">
      34
    </div>

    <div class="gridsquare">
      35
    </div>

    <div class="gridsquare">
      36
    </div>
  </div>

Community · Accepted Answer · 2020-05-21 14:11:14Z

3

var n=4;//take grid column value as you want

for(var i = 0; i < n; i++) {
    document.body.innerHTML+='<div class="row">';

    for(j = 0; j < n; j++) {
        document.body.innerHTML+='<div class="gridsquare">' + (i*5+j+1) + '</div>';
    }

    document.body.innerHTML+='</div>';
}

edited May 21, 2020 at 14:11

CommunityBot

11 silver badge

answered Jun 18, 2012 at 13:02

user1432124

Comments

RAKESH HOLKAR · Accepted Answer · 2012-06-18 13:02:37Z

0

var grd="";
var rowCount=3;
for(var i=0; i<rowCount; i++){
/*here make whole string with row id to make identification of row then

you can select specific row */

}

$(yourelement).append(grd);

I think it will be good way to identify row

answered Jun 18, 2012 at 13:02

RAKESH HOLKAR

2,1976 gold badges24 silver badges42 bronze badges

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