摘要：
i<；列表长度；i++）{//subWeight+=数字（list[i].itemWeight）；subWeight=BigNumber（subWeight）.plus（数字（list[i].itemWeight））；allowSubWeight=newBigNumber（allowSubWeight）.binus（subWeight）；
npm install bignumber.js
在vue文件中引用
import BigNumber from "bignumber.js";
加法和减法
for (let i = 0; i < list.length; i++) { // subWeight += Number(list[i].itemWeight); subWeight = BigNumber(subWeight).plus(Number(list[i].itemWeight)); } // allowSubWeight = allowSubWeight - subWeight; allowSubWeight = new BigNumber(allowSubWeight).minus(subWeight);
https://www.cnblogs.com/xianfengzhike/p/9939012.html
https://www.cnblogs.com/wjs0509/p/14355453.html