Applying scroll to table keeping header fixed

Question

I was looking for a way to apply the scroll vertically and horizontally keeping the header fixed to my table.

I found in that fiddle a possible solution to this case.

$('table').on('scroll', function () {
    $("table > *").width($("table").width() + $("table").scrollLeft());
});

html {
    font-family: verdana;
    font-size: 10pt;
    line-height: 25px;
}
table {
    border-collapse: collapse;
    width: 300px;
    overflow-x: scroll;
    display: block;
}
thead {
    background-color: #EFEFEF;
}
thead, tbody {
    display: block;
}
tbody {
    overflow-y: scroll;
    overflow-x: hidden;
    height: 140px;
}
td, th {
    min-width: 100px;
    height: 25px;
    border: dashed 1px lightblue;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 

<table>
    <thead>
        <tr>
            <th>Column 1</th>
            <th>Column 2</th>
            <th>Column 3</th>
            <th>Column 4</th>
            <th>Column 5</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>Row 1</td>
            <td>Row 1</td>
            <td>Row 1</td>
            <td>Row 1</td>
            <td>Row 1</td>
        </tr>
        <tr>
            <td>Row 2</td>
            <td>Row 2</td>
            <td>Row 2</td>
            <td>Row 2</td>
            <td>Row 2</td>
        </tr>
        <tr>
            <td>Row 3</td>
            <td>Row 3</td>
            <td>Row 3</td>
            <td>Row 3</td>
            <td>Row 3</td>
        </tr>
        <tr>
            <td>Row 4</td>
            <td>Row 4</td>
            <td>Row 4</td>
            <td>Row 4</td>
            <td>Row 4</td>
        </tr>
        <tr>
            <td>Row 5</td>
            <td>Row 5</td>
            <td>Row 5</td>
            <td>Row 5</td>
            <td>Row 5</td>
        </tr>
        <tr>
            <td>Row 6</td>
            <td>Row 6</td>
            <td>Row 6</td>
            <td>Row 6</td>
            <td>Row 6</td>
        </tr>
        <tr>
            <td>Row 7</td>
            <td>Row 7</td>
            <td>Row 7</td>
            <td>Row 7</td>
            <td>Row 7</td>
        </tr>
        <tr>
            <td>Row 8</td>
            <td>Row 8</td>
            <td>Row 8</td>
            <td>Row 8</td>
            <td>Row 8</td>
        </tr>
        <tr>
            <td>Row 9</td>
            <td>Row 9</td>
            <td>Row 9</td>
            <td>Row 9</td>
            <td>Row 9</td>
        </tr>
        <tr>
            <td>Row 10</td>
            <td>Row 10</td>
            <td>Row 10</td>
            <td>Row 10</td>
            <td>Row 10</td>
        </tr>
    </tbody>
</table>

When I try to pass the code snippet above to my html file. it does not correctly display the horizontal scroll.

I don’t understand why fiddle worked and in my file does not work.

Answer 1

Your jquery script is running before the page, just put the script at the end that solves the problem.

Answer 2

$('table').on('scroll', function () {
    $("table > *").width($("table").width() + $("table").scrollLeft());
});

html {
    font-family: verdana;
    font-size: 10pt;
    line-height: 25px;
}
table {
    border-collapse: collapse;
    width: 300px;
    overflow-x: scroll;
    display: block;
}
thead {
    background-color: #EFEFEF;
}
thead, tbody {
    display: block;
}
tbody {
    overflow-y: scroll;
    overflow-x: hidden;
    height: 140px;
}
td, th {
    min-width: 100px;
    height: 25px;
    border: dashed 1px lightblue;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table>
    <thead>
        <tr>
            <th>Column 1</th>
            <th>Column 2</th>
            <th>Column 3</th>
            <th>Column 4</th>
            <th>Column 5</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>Row 1</td>
            <td>Row 1</td>
            <td>Row 1</td>
            <td>Row 1</td>
            <td>Row 1</td>
        </tr>
        <tr>
            <td>Row 2</td>
            <td>Row 2</td>
            <td>Row 2</td>
            <td>Row 2</td>
            <td>Row 2</td>
        </tr>
        <tr>
            <td>Row 3</td>
            <td>Row 3</td>
            <td>Row 3</td>
            <td>Row 3</td>
            <td>Row 3</td>
        </tr>
        <tr>
            <td>Row 4</td>
            <td>Row 4</td>
            <td>Row 4</td>
            <td>Row 4</td>
            <td>Row 4</td>
        </tr>
        <tr>
            <td>Row 5</td>
            <td>Row 5</td>
            <td>Row 5</td>
            <td>Row 5</td>
            <td>Row 5</td>
        </tr>
        <tr>
            <td>Row 6</td>
            <td>Row 6</td>
            <td>Row 6</td>
            <td>Row 6</td>
            <td>Row 6</td>
        </tr>
        <tr>
            <td>Row 7</td>
            <td>Row 7</td>
            <td>Row 7</td>
            <td>Row 7</td>
            <td>Row 7</td>
        </tr>
        <tr>
            <td>Row 8</td>
            <td>Row 8</td>
            <td>Row 8</td>
            <td>Row 8</td>
            <td>Row 8</td>
        </tr>
        <tr>
            <td>Row 9</td>
            <td>Row 9</td>
            <td>Row 9</td>
            <td>Row 9</td>
            <td>Row 9</td>
        </tr>
        <tr>
            <td>Row 10</td>
            <td>Row 10</td>
            <td>Row 10</td>
            <td>Row 10</td>
            <td>Row 10</td>
        </tr>
    </tbody>
</table>

Although it may appear that the order is as shown above within your page, click on run and within that area click with the right mouse and select Display source code and notice where the code snippet is located

 $('table').on('scroll', function () {
    $("table > *").width($("table").width() + $("table").scrollLeft());
}); 

within html

Considerations ## Source

If you try to access some DOM element still at the head of the page, it will not exist and an error will happen. Hence the recommendation to put the script before closing the body tag.

However, anyone using jQuery can use a library resource (which we can do with pure JS if we want) that allows loading the script in the head, but its execution is done only when the DOM is mounted (except image loading, which jQuery does not expect). This syntax can be:

$(document).ready(function() {
// seu código aqui
});