# jsbi-calculator
**Repository Path**: leslie_wong/jsbi-calculator
## Basic Information
- **Project Name**: jsbi-calculator
- **Description**: JSBI-Calculator是一个IE11兼容的计算器JS库组件，用于实现高精度（至多18位小数）大数值四则运算，基于由谷歌Chrome实验室出品的JSBI封装的BigDecimial。
- **Primary Language**: JavaScript
- **License**: Apache-2.0
- **Default Branch**: main
- **Homepage**: None
- **GVP Project**: No
## Statistics
- **Stars**: 2
- **Forks**: 0
- **Created**: 2023-04-27
- **Last Updated**: 2024-06-22
## Categories & Tags
**Categories**: Uncategorized
**Tags**: 数学, 大数, BigDecimal, 四则运算
## README
# JSBI-Calculator
[](https://github.com/Leslie-Wong-H/jsbi-calculator/blob/master/LICENSE)
[](https://app.codecov.io/gh/Leslie-Wong-H/jsbi-calculator/branch/main)
[](https://github.com/Leslie-Wong-H/jsbi-calculator/actions)
[](https://github.com/Leslie-Wong-H/jsbi-calculator/releases/latest)
[](https://www.npmjs.com/package/jsbi-calculator)
JSBI-Calculator是一个IE11兼容的计算器JS库组件，用于实现高精度（至多18位小数）大数值四则运算，基于由谷歌Chrome实验室出品的JSBI封装的BigDecimal。
该项目反哺[GoogleChromeLabs/jsbi](https://github.com/GoogleChromeLabs/jsbi/issues/79)作出了不凡贡献。
## 安装
```
> npm install jsbi-calculator
```
## 示例
## 用法
> ES6模块:
```js
import JBC from "jsbi-calculator";
const { calculator } = JBC;
const expressionOne = "((10 * (24 / ((9 + 3) * (-2)))) + 17) + 5";
const resultOne = calculator(expressionOne);
console.log(resultOne);
// -> '12'
const max = String(Number.MAX_SAFE_INTEGER);
console.log(max);
// -> '9007199254740991'
const expressionTwo = `${max} + 2`;
const resultTwo = calculator(expressionTwo);
console.log(resultTwo);
// -> '9007199254740993'
```
> Node CommonJS模块:
```js
const JBC = require("jsbi-calculator");
const { calculator } = JBC;
const expressionOne = "((10 * (24 / ((9 + 3) * (-2)))) + 17) + 5";
const resultOne = calculator(expressionOne);
console.log(resultOne);
// -> '12'
const max = String(Number.MAX_SAFE_INTEGER);
console.log(max);
// -> '9007199254740991'
const expressionTwo = `${max} + 2`;
const resultTwo = calculator(expressionTwo);
console.log(resultTwo);
// -> '9007199254740993'
```
> 浏览器:
```html
Jsbi-calculator Test
```
## 注意
下面表格中的运算操作是有涉及到的。请注意，负数需要以`-`开头且需要用括号括起来，例如`(-11)`,正数不能以`+`号开头。
| 运算操作 | 运算符号 |
| -------- | ----------------------------------- |
| 加法 | `+` |
| 减法 | `-` |
| 乘法 | `*` |
| 除法 | `/` |
| 平方根 | JBC.BigDecimal.sqrt(num).toString() |
## 致谢
项目开发得到了下列资源的灵感启发。
[GoogleChromeLabs/jsbi](https://github.com/GoogleChromeLabs/jsbi)
[trincot's answer to _BigDecimal in JavaScript_](https://stackoverflow.com/a/66939244/8808175)
[LeetCode150 - Evaluate Reverse Polish Notation](https://leetcode.com/problems/evaluate-reverse-polish-notation/)
[Parsing math expressions with JavaScript - FreeCodeCamp](https://www.freecodecamp.org/news/parsing-math-expressions-with-javascript-7e8f5572276e/)
## [苍穹之下](https://github.com/Leslie-Wong-H/jsbi-calculator/blob/main/src/jsbi-calculator.ts)