bignumber.js处理小数高精度问题

import BigNumber from 'bignumber.js';

/**

* 加法

* @param num { number }

* @param rest { number }

* @return {number}

*/

export const add = (num, ...rest) => {

let bn = new BigNumber(num)

rest.forEach(item => {

bn = new BigNumber(bn.plus(item))

})

return bn.toNumber()

}

/**

* 减法

* @param num{ number }

* @param rest{ number }

* @return {number}

*/

export const subtract = (num, ...rest) => {

let bn = new BigNumber(num)

rest.forEach(item => {

bn = new BigNumber(bn.minus(item))

})

return bn.toNumber()

}

/**

* 乘法

* @param num{ number }

* @param rest{ number }

* @return {number}

*/

export const multiply = (num, ...rest) => {

let bn = new BigNumber(num)

rest.forEach(item => {

bn = new BigNumber(bn.multipliedBy(item))

})

return bn.toNumber()

}

/**

* 除法

* @param num{ number }

* @param rest{ number }

* @return {number}

*/

export const divide = (num, ...rest) => {

let bn = new BigNumber(num)

rest.forEach(item => {

bn = new BigNumber(bn.dividedBy(item))

})

return bn.toNumber()

}