/**
 * Toggle all descendant checkboxes of a target.
 *
 * Use `data-target="ID_OF_TARGET"` on the node on which the event is listened
 * to (checkbox, button, link…), where_ID_OF_TARGET_ should be the ID of an
 * ancestor for the checkboxes.
 */
(function() {
    'use strict';

    function toggleAllCheckboxes(event) {
        const mainCheckbox = event.target;

        document
            .querySelectorAll(`#${mainCheckbox.dataset.target} [type="checkbox"]`)
            .forEach(checkbox => {checkbox.checked = mainCheckbox.checked;});
    }

    document
        .querySelectorAll('[data-action="toggle-all"]')
        .forEach(input => {
            input.addEventListener('change', toggleAllCheckboxes);
        });
})();