• 安装依赖 decimal.js
  • npm install --save decimal.js
• 封装
  • 在utils文件夹下创建decimal.js文件

import { Decimal } from 'decimal.js'
export function add (x, y) {if (!x) {x = 0}if (!y) {y = 0}const xx = new Decimal(x)const yy = new Decimal(y)return xx.plus(yy).toNumber()
}
// 减
export function sub (x, y) {if (!x) {x = 0}if (!y) {y = 0}const xx = new Decimal(x)const yy = new Decimal(y)return xx.sub(yy).toNumber()
}
// 除
export function div (x, y) {if (!x) {x = 0}if (!y) {return 0}const xx = new Decimal(x)const yy = new Decimal(y)return xx.div(yy).toNumber()
}
//乘
export function mul (x, y) {if (!x) {x = 0}if (!y) {y = 0}const xx = new Decimal(x)const yy = new Decimal(y)return xx.mul(yy).toNumber()
}

• 页面使用

<script>import {add} from "@/utils/decimal"export default {methods:{handlePlus() {add(10.5,4.877)}}}
</script>