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num-tofixed

toFixed with Math.round,fixed the bug of original toFixed function

  • 1.0.3
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num-tofixed组件说明

  • 修正原生toFixed方法的精度问题
  • 支持四舍五入和直接截取

安装

npm install num-tofixed --save

使用

测试用例

npm install
npm test

示例:

// 通过script标签引入
// var toFixed = window.toFixed;

var toFixed = require('num-tofixed');

// 精确度取四舍五入值
toFixed(0.099999,3,true) //  '0.100'
toFixed(0.999999,3,true) //  '1.000'
toFixed(0.09,2,true)     //  '0.09'
toFixed(0.09,1,true)     //  '0.1'
toFixed(0.09,5,true)     //  '0.09000'
toFixed(0.09,0,true)     //  '0'
toFixed(0.99,3,true)     //  '0.990'
toFixed(0.99,1,true)     //  '1.0'
toFixed(.99,3,true)      //  '0.990'

toFixed(1.099999,3,true)  // '1.100'
toFixed(1.999999,3,true)  // '2.000'
toFixed(1.09,2,true)      // '1.09'
toFixed(1.09,1,true)      // '1.1'
toFixed(1.09,5,true)      // '1.09000'
toFixed(9.09,0,true)      // '9'
toFixed(9.99,3,true)      // '9.990'
toFixed(9.99,1,true)      // '10.0'
toFixed(199.9999,3,true)  // '200.000'

// 根据精确度直接截取小数点
toFixed(0.099999,3,false) // '0.099'
toFixed(0.09,2,false)     // '0.09'
toFixed(0.09,1,false)     // '0.0'
toFixed(0.09,5,false)     // '0.09000'
toFixed(0.09,0,false)     // '0'
toFixed(0.99,3,false)     // '0.990'
toFixed(.99,3,false)      // '0.990'

API

toFixed(num,digit,isRound)

说明: 修正原生toFixed方法的精度问题,支持四舍五入和直接截取

num: String|Number, 需要取精度的数字或则可转换为数字的字符串

digit: Number 保留的小数点位数,可取范围为(0,20],末尾不足位数时补0

isRoundBoolean 保留小数点时是否进行四舍五入,默认为false,即直接截取,不进行四舍五入

return String

版本记录

v1.0.3 2018-04-20
  • 修正readme
v1.0.1,1.0.2 2018-04-20
  • 修正isRound的默认值为false
v1.0.0 2018-04-20
  • 组件发布

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Package last updated on 20 Apr 2018

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