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babel-plugin-number-calc-autorepair

v1.1.2

Published

auto repair number calculate

Downloads

10

Readme

babel-plugin-number-calc-autorepair

  • 自动修复 JavaScript 引擎中的浮点陷阱
  • 支持基于注释的豁免, 可豁免整个文件或只豁免某处代码
  • 自动修复的运算符: +-*/ 以及 +=-=*=/=
  • TODO: 待自动修复的运算符: : %%=++--

使用示例: 运行 npm install && npm run build

快速使用

安装依赖

npm i -D babel-plugin-number-calc-autorepair

配置 babel

{
  "plugins": ["number-calc-autorepair"]
}

代码转换示例

输入

function calcAdd(a, b) {
  return a + b;
}

function calcAll(a, b, c, d) {
  return a + b * c / d;
}

输出

// _numberAcc.accAdd: 内部会判断变量 a 的类型, 非数字类型时, 插件不做处理
// 导出对象名确保唯一性: 如果已有 _numberAcc 变量, 则导出对象命名为 _numberAcc2, 依次类推

var _numberAcc = require('babel-plugin-number-calc-autorepair/dist/number-acc.js');

function calcAdd(a, b) {
  return _numberAcc.accAdd(a, b);
}

function calcAll(a, b, c, d) {
  return _numberAcc.accAdd(a, _numberAcc.accDiv(_numberAcc.accMulti(b, c), d));
}

豁免配置

  • 豁免整个文件: 在文件头部添加一行单独注释即可, /* babel-disable-autofix-file */
  • 豁免某处代码: 需确保注释在运算符左侧或右侧, const a = 10 + /* xxbabel-disable-autofix */ 100

number-acc.js 文件实现

import { accAdd as accAddInner } from 'xtools_js/lib/number/index';

export { accDiv, accMulti, accSub } from 'xtools_js/lib/number/index';

export function accAdd(a, b) {
  if (typeof a === 'number') {
    return accAddInner(a, b)
  } else {
    return a +/* babel-disable-autofix */ b
  }
};