获取React JS中的值的总和

Question

data: {
goodReceiveNote:{ id:1,netTotal: null}
poDetailsList:[
0:{id:1,subTotal:300},
1:{id:1,subTotal:200}
]
}

如何在react中获取poDetailsList subTotal的总和并将其分配给goodReceiveNote中的netTotal。

Answer 1

将数组reduce与Object.values 组合使用

const total = Object.values(data.poDetailsList).reduce((a,b) => a + b.subTotal, 0)