iTop/templates/base/components/button/buttonjs.html.twig

{% set sAriaLabel = oUIBlock.GetLabel() is not empty ? oUIBlock.GetLabel() : (oUIBlock.GetTooltip() is not empty ? oUIBlock.GetTooltip() : '') %}
<button id="{{ oUIBlock.GetId() }}"
        class="ibo-button ibo-is-{{ oUIBlock.GetActionType() }} ibo-is-{{ oUIBlock.GetColor() }} {{ oUIBlock.GetAdditionalCSSClassesAsString() }} {% if oUIBlock.IsHidden() %}ibo-is-hidden{% endif %}"
        {% if oUIBlock.GetDataAttributes() %}
            {% for sName, sValue in oUIBlock.GetDataAttributes() %}
                data-{{ sName }}="{{ sValue }}"
            {% endfor %}
        {% endif %}
        type="{{ oUIBlock.GetType() }}"
        name="{{ oUIBlock.GetName() }}"
        value="{{ oUIBlock.GetValue() }}"
        {% if oUIBlock.IsDisabled() %} disabled {% endif %}
        {# Visual tooltip... #}
        {% if oUIBlock.GetTooltip() is not empty %}
            data-tooltip-content="{{ oUIBlock.GetTooltip() }}"
        {% else %}
            title="{{ oUIBlock.GetLabel() }}"
        {% endif %}
        {# ... and accessibility title. Important especially in case the button has no label, but only an icon #}
        {% if sAriaLabel is not empty %}
            aria-label="{{ sAriaLabel }}"
        {% endif %}
>
    {% if oUIBlock.GetIconClass() is not empty %}
        <span class="ibo-button--icon {{ oUIBlock.GetIconClass() }}"></span>
    {% endif %}
    {% if oUIBlock.GetLabel() is not empty %}
        <span class="ibo-button--label">{{ oUIBlock.GetLabel() }}</span>
    {% endif %}
</button>