Function safeRegisterElement

app/javascript/form.js:12–12

(name, element, options = {})

import ModalButton from './elements/modal_button'

const safeRegisterElement = (name, element, options = {}) => !window.customElements.get(name) && window.customElements.define(name, element, options)

safeRegisterElement('download-button', DownloadButton)
safeRegisterElement('toggle-submit', ToggleSubmit)