mathjs 封装使用

import { bignumber, chain } from 'mathjs'
export const calculate = {
  comp: function (_func, args) {
    let t = chain(bignumber(Number(args[0])))
    for (let i = 1; i < args.length; i++) {
      const target = Number(args[i])
      if (target) {
        t = t[_func](bignumber(target))
      }
    }
    // 防止超过6位使用科学计数法
    return parseFloat(t.done())
  },
  //加
  add: function () {
    return this.comp('add', arguments)
  },
  //减
  subtract: function () {
    return this.comp('subtract', arguments)
  },
  //乘
  multiply: function () {
    return this.comp('multiply', arguments)
  },
  //除
  divide: function () {
    return this.comp('divide', arguments)
  },
}