第三方库地址：GitHub - MikeMcl/decimal.js: An arbitrary-precision Decimal type for JavaScript

之前都是api接口走后端计算，偶尔发现这个库也不错，计算简单，目前发现比较准确

上代码

导入js

import Decimal from '../../utils/decimal'

var tmpPrice = cartList[i].sceneConfigurations[j].items[k].goodsSku.price;
var tmpNum = cartList[i].sceneConfigurations[j].items[k].num;
let tmp = Decimal.mul(tmpPrice, tmpNum).toNumber();
totalPrice = Decimal.add(totalPrice, tmp).toNumber();