Validate input

In this example, by using the beforeendedit event you can prevent digits from being entered.

import canvasDatagrid from 'canvas-datagrid';
import data from '/data.json';

const app = document.getElementById('app');
const gridElement = document.createElement('div');
const grid = canvasDatagrid({
  parentNode: gridElement,
  data,
});

grid.addEventListener('beforeendedit', function (event) {
  if (/\d+/.test(event.newValue)) {
    alert('NO DIGITS!');
    event.preventDefault();
  }
});

app.append(gridElement);