import { LightningElement,track} from 'lwc'; export default class WrapperTable extends LightningElement { @track data = [ { id: 1, name: 'John Doe', email: 'john.doe@example.com' }, { id: 2, name: 'Jane Smith', email: 'jane.smith@example.com' } ]; @track columns = [ { label: 'ID', fieldName: 'id' }, { label: 'Name', fieldName: 'name' }, { label: 'Email', fieldName: 'email' } ]; }