chill-bundles/src/Bundle/ChillPersonBundle/Resources/public/page/person_resource/freetext-input.js

import {ShowHide} from 'ChillMainAssets/lib/show_hide/show_hide.js';

window.addEventListener('DOMContentLoaded', function() {
    let
        freetextContainer = document.querySelector('#freetext-entity'),
        entitySelector = document.querySelector('#entity-selector')
    ;
    if (null === entitySelector) {
        return;
    }

    new ShowHide({
        debug: true,
        load_event: null,
        froms: [entitySelector],
        container: [freetextContainer],
        test: function(froms, event) {
            for (let container of froms) {
                return container.querySelector('input[value="freetext"]').checked;
            }
            console.log('we couldnt find the input');
            return false;
        },
    })
});