ing-creditcard-export.js

javascript: (function(f, a) {
	f = new Blob(['"Date","Description","Amount"\n', [].map.call(queryAllShadow('[data-tag-name="ing-ow-expandable-item"]', queryAllShadow('[data-tag-name="ing-feat-transaction-period"]').reverse()[0]), row => ([
		row.closest('.date-item').querySelector('time').getAttribute('datetime'),
		row.querySelector('h5').textContent.trim(),
		row.querySelector('h5 + strong').textContent.trim().replace(',', '.').replace('−', '-'),
	]).map(col => '"' + col.replace(/"/g, '""') + '"').join(',')).join('\n')], {type: 'text/plain'});
	a = document.createElement('a');
	a.download = 'trans.csv';
	a.href = URL.createObjectURL(f);
	a.click();
})(); void(0)

queryAllShadow.js

queryAllShadow = function(selector, doc) {
	const roots = [doc || document];
	const addRoots = (root) => [root, ...root.querySelectorAll('*')].forEach(el => {
		if (el.shadowRoot) {
			roots.push(el.shadowRoot);
			addRoots(el.shadowRoot);
		}
	});
	addRoots(roots[0]);

	const els = [];
	roots.forEach(root => {
		els.push(...root.querySelectorAll(selector));
	});
	return els;
};