bignumber.js是一款用于任意精度十进制和非十进制算术的JavaScript库

npm install bignumber.js

import { BigNumber } from ‘bignumber.js‘

0.1 + 0.2                       // 0.30000000000000004
x = BigNumber(0.1)
y = x.plus(0.2)                 // ‘0.3‘

0.3 - 0.1                       // 0.19999999999999998
x = BigNumber(0.3)
x.minus(0.1)                    // ‘0.2‘

0.6 * 3                         // 1.7999999999999998
x = BigNumber(0.6)
y = x.multipliedBy(3)           // ‘1.8‘

x = BigNumber(355)
y = BigNumber(113)
x.dividedBy(y)                  // ‘3.14159292035398230088‘

x = BigNumber(5)
y = BigNumber(3)
x.dividedToIntegerBy(y)         // ‘1‘