bignumber.js

bignumber.js

用于任意精度十进制和非十进制算术的 JavaScript 库。
gitHub官网地址：https://github.com/MikeMcl/bignumber.js

安装

npm install --save bignumber.js

plus()：加法

import BigNumber from "bignumber.js";
export default {
  mounted() {
    let x = new BigNumber(0.1);
    let y = x.plus(0.2);
    console.log("精度丢失", 0.1 + 0.2); //0.30000000000000004
    console.log("y", y.toNumber()); //0.3
  },
};

minus()：减法

import BigNumber from "bignumber.js";
export default {
  mounted() {
    let x = new BigNumber(0.4);
    let y = x.minus(0.1);
    console.log("精度丢失", 0.4 - 0.1); //0.30000000000000004
    console.log("y", y.toNumber()); //0.3
  },
};