const calculator = document.querySelector(‘.calculator’) const keys = calculator.querySelector(‘.calculator__keys’) keys.addEventListener(‘click’, e => { if (e.target.matches(‘button’)) { // Do something } })onst key = e.target const action = key.dataset.actionif (!action) { console.log('number key!') }if ( action === 'add' || action === 'subtract' || action === 'multiply' || action === 'divide' ) { console.log('operator key!') }if ( action === 'add' || action === 'subtract' || action === 'multiply' || action === 'divide' ) { console.log('operator key!') }if (action === 'decimal') { console.log('decimal key!') } if (action === 'clear') { console.log('clear key!') } if (action === 'calculate') { console.log('equal key!') }

3/Technology/small-col-left

3/Sports/small-col-right

3/Food/recent-videos

3/Music/post-grid

3/Business/big-col-left

3/Fashion/big-col-right

3/Nature/post-grid