CODEWITHSUNDEEP
javascriptjquerycss
foexy
foexy

Reputation: 31

How to select 5 successive rows

I got a table with several trs. I want to select 5 trs in a row and give them a background color, then take the next 5 trs and give them another background color - like even and odd, but with 5 elements as a block.

This is what I have tried

var trs = $('table.small-only tr');
for (var i = 1; i < trs.length; i += 5) {
    if (i%2 == 0){
        // select even blocks
    }else {
        // select odd blocks
    }
}

This doesn't work though.

How can I select blocks containing 5 trs and give the even and odd blocks different background colors in a proper way?

I found a work around:

for (var i = 1; i < trs.length; i += 5) {
    trs.slice(i, i + 5).wrapAll("<div></div>");
}

and 

div {
    &:nth-of-type(odd) {
        background: #f2f2f2 !important;
    }
}

But clearly putting divs around trs in a table isn't a good way.

Upvotes: 2

Views: 128

Answers (5)

G-Cyrillus
G-Cyrillus

Reputation: 106008

You can also use CSS selector :nth-child(xn) and :not():

tr:nth-child(10n - 5)~ tr:not(:nth-child(10n + 1)):not(:nth-child(10n + 2)):not(:nth-child(10n + 3)):not(:nth-child(10n + 4)):not(:nth-child(10n + 5)) {background-color:gray}


tr {
  background: turquoise;
  counter-increment: trs;
}
tr:nth-child(10n - 5)~ tr:not(:nth-child(10n + 1)):not(:nth-child(10n + 2)):not(:nth-child(10n + 3)):not(:nth-child(10n + 4)):not(:nth-child(10n + 5)) {
  background: tomato
}
/* check row numbers */

tr:before {
  content: counter(trs);
  display: table-cell;
  padding: 0.25em;
  border: solid;
  background: yellow;
}
tr:nth-child(odd):before {
  background: gray;
}
td {
  padding: 0.25em;
  border: solid;
}
<table>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
  </tr>
</table>

Upvotes: 0

Tonmoy Nandy
Tonmoy Nandy

Reputation: 381

You can do like that way

HTML

<table class="table">
   <tr><td>test</td></tr>
   <tr><td>test</td></tr>
   <tr><td>test</td></tr>
   <tr><td>test</td></tr>
   <tr><td>test</td></tr>
  <tr><td>test</td></tr>
  <tr><td>test</td></tr>
  <tr><td>test</td></tr>
  <tr><td>test</td></tr>
  <tr><td>test</td></tr>
  <tr><td>test</td></tr>
  <tr><td>test</td></tr>
  <tr><td>test</td></tr>
  <tr><td>test</td></tr>
  <tr><td>test</td></tr>
  <tr><td>test</td></tr>
  <tr><td>test</td></tr>
  <tr><td>test</td></tr>
  <tr><td>test</td></tr>
  <tr><td>test</td></tr>
  <tr><td>test</td></tr>
  <tr><td>test</td></tr>
 <tr><td>test</td></tr>
 <tr><td>test</td></tr>
 <tr><td>test</td></tr>
 </table>

Jquery

$(function(){
 var limit = 5;
 var arr = ['red','green','yellow','blue','orange'];
 $('.table tr').each(function(i,e){
     var ind = parseInt((i/limit));
     $(this).css('background',arr[ind]);
 })
 })

Upvotes: 1

Hendrik Hamerlinck
Hendrik Hamerlinck

Reputation: 64

Here is my example:

function getRandomColor() {
    var letters = '0123456789ABCDEF';
    var color = '#';
    for (var i = 0; i < 6; i++ ) {
        color += letters[Math.floor(Math.random() * 16)];
    }
    return color;
}

var my_table_rows= $('.my-table tr');
var color;
for (var i = 0; i < my_table_rows.length; i++){
	if (i % 5 === 0) color = getRandomColor();
  my_table_rows.eq(i).css('background', color);
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table class="my-table">
  <tr><td>1</td></tr>
  <tr><td>2</td></tr>
  <tr><td>3</td></tr>
  <tr><td>4</td></tr>
  <tr><td>5</td></tr>
  <tr><td>6</td></tr>
  <tr><td>7</td></tr>
  <tr><td>8</td></tr>
  <tr><td>9</td></tr>
  <tr><td>10</td></tr>
  <tr><td>11</td></tr>
  <tr><td>12</td></tr>
  <tr><td>13</td></tr>
  <tr><td>14</td></tr>
  <tr><td>15</td></tr>
  <tr><td>16</td></tr>
  <tr><td>17</td></tr>
</table>

Upvotes: 4

Rory McCrossan
Rory McCrossan

Reputation: 337626

To achieve this you can loop through the tr elements in the table stepping over the number of rows you want per group. You can then use slice() to retrieve the set number of rows before calling addClass() on them. Try this:

var groupSize = 5;
var classes = ['group1', 'group2'];
var $rows = $("table.small-only tr");

for(var i = 0; i < $rows.length; i += groupSize) {
  $rows.slice(i, i + groupSize).addClass(classes[i / groupSize % classes.length]);
}
.group1 { background-color: #C00; }
.group2 { background-color: #0C0; }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table class="small-only">
    <tr><td>1</td></tr>
    <tr><td>2</td></tr>
    <tr><td>3</td></tr>
    <tr><td>4</td></tr>
    <tr><td>5</td></tr>
    <tr><td>6</td></tr>
    <tr><td>7</td></tr>
    <tr><td>8</td></tr>
    <tr><td>9</td></tr>
    <tr><td>10</td></tr>
    <tr><td>11</td></tr>
    <tr><td>12</td></tr>
</table>

Upvotes: 2

charlietfl
charlietfl

Reputation: 171689

but clearly putting divs around trs in a table isnt a good way

No, it is invalid html. However you can use <tbody> instead of <div>

A table can have any number of <tbody> elements

Upvotes: 1

Related Questions