let fileSelector: HTMLInputElement; export function openSystemFilesDialog(accept = '*', callback: (e: Event) => void, noMultiple = false) { if (!fileSelector) { fileSelector = document.createElement('input'); fileSelector.setAttribute('type', 'file'); } fileSelector.setAttribute('accept', accept); if (noMultiple) { fileSelector.removeAttribute('multiple'); } else { fileSelector.setAttribute('multiple', 'multiple'); } // eslint-disable-next-line no-null/no-null fileSelector.onchange = null; fileSelector.value = ''; fileSelector.onchange = callback; fileSelector.click(); }