Editing with recalculation in a shopping calculator in JavaScript

Let's now improve the allowEdit function so that the recalculation described in the previous lesson is performed.

At this point, your function code should look something like this:

function allowEdit(td) {
	td.addEventListener('dblclick', function() {
		let text = td.textContent
		td.textContent = '';
		
		let input = document.createElement('input');
		input.value = text;
		input.focus();
		td.appendChild(input);
		
		input.addEventListener('keydown', function(event) {
			if (event.key == 'Enter') {
				td.textContent = this.value;
			}
		});
	});
}

Let's add a code that will perform recalculation for the cell with the price and for the cell with the amount:

function allowEdit(td) {
	td.addEventListener('dblclick', function() {
		let text = td.textContent
		td.textContent = '';
		
		let input = document.createElement('input');
		input.value = text;
		input.focus();
		td.appendChild(input);
		
		input.addEventListener('keydown', function(event) {
			if (event.key == 'Enter') {
				td.textContent = this.value;
				
				if (td.classList.contains('price') || td.classList.contains('amount')) {
					// perform recalculation
				}
			}
		});
	});
}

Add the missing part of the code so that when you change the cell with the price or the cell with the amount, the purchase cost in the cost column changes, and the total amount is also recalculated.