render() { const stockListRows = []; this.state.stockList.forEach((item) => { stockListRows.push( <StockBlock key={item.stockCode} code={item.stockCode} companyName={item.companyName} update={this.update} />); }); return ( <div> <div className="col-md-4 col-sm-6 stock-block stock-new"> <StockAddForm update={this.update} /> </div> {stockListRows} </div> ); }