The Checkbox generated by Javascript is failing to properly close the tag

When I generate a checkbox in this manner and insert it into my table's [TD] tag:

let checkbox = document.createElement('input');
checkbox.type = 'checkbox';

td.appendChild(checkbox);

It yields:

<tr>
    <td>
        <input type="checkbox" value="Current Issue">
    </td>
</tr>

The opening input tag is not properly closed, resulting in issues elsewhere in the code, such as the hover effect malfunctioning.

Do I need to modify my Javascript in order for the tag to close properly?

Answer №1

The usage of closing tags is determined by the DOCTYPE being used. For example, XHTML mandates closing tags while HTML does not. It appears that browsers may automatically determine the necessity of closing tags for dynamically generated elements based on the specified DOCTYPE.

Furthermore, there seems to be an issue with the parser on jsfiddle as it requires a closing tag even though the markup validates correctly when checked with the W3C validator.

Answer №2

Your CSS selectors are missing the target.

.Table .Popup tr:hover {
    background-color:red;
}

should actually be:

.Popup tr:hover {
    background-color:red;
}

(Check it out: http://jsfiddle.net/kUTDB/4/)

Also, update your code from:

.Table .Popup .PopupRow:hover {
    background-color:red;
}

to either

table tr.PopupRow:hover {
    background-color:red;
}

or

table .PopupRow:hover {
    background-color:red;
}

(View here: http://jsfiddle.net/kUTDB/5/)

Note that both options will style the same elements, but the one with higher specificity (the second one) will take precedence.

The first selector, .Table .Popup tr:hover, targets tr elements being hovered over within an element with the class of Popup which is inside an element with the class of Table.

Meanwhile, the second selector, .Table .Popup .PopupRow:hover, selects any elements with the class of PopupRow being hovered over within an element with the class of Popup nested within an element with the class of Table.

Your HTML structure in the fiddle doesn't match this hierarchy, hence why the styles aren't applying as expected.

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