Allow false value for data attribute in HTML attributes extension

[laurentmuller]

I use the bootstrap-table plugin in my Symfony project.

For the column definitions, I use the html_attr Twig function. I want to hide some columns with the visible property.

{% macro output_column(column) -%}
    {% set attrs = {
        'data-field': column.field,
        'data-align': column.align,
        'data-visible': column.visible
    } %}
    <th {{ html_attr(attrs) }}>
        {{ column.title }}
    </th>
{%- endmacro %}

But when the visible property of the column is false, then the attribute is removed. So I cannot hide the column.

It will be nice to use the same behavior as for aria-* attributes (convert the boolean false value to 'false' string).

[stof]

The thing is, we cannot guess whether you want to treat your custom attribute as a true boolean attribute (i.e. based on the presence of the attribute) or as an attribute containing the string true or false.
We have a special case for aria attributes because we know their meaning, to simplify things. For custom attributes, the solution is to provide the value as a string (as expected in the result)