hanzhangyu/babel-plugin-auto-numeral

use numeral automatically

babel-plugin-auto-numeral

Why?

1. Solving IEE754 by numeral usually takes 3 times of code, this plugin can resolve +-*/ automatically.
2. Simulated human computing

Require

babel7

Install from npm

npm i -D babel-plugin-auto-numeral

Usage

1. add babel plugin:

{
    "plugins": [
        ["babel-plugin-auto-numeral",{"precision": 2,"numeralName": "numeral"}]
    ]
}

2. import numeral and use it

import numeral from 'numeral'; // require numeralName first
const a = 1;
console.log(numeral(a + 0.7 * 0.7)); // 1.49

options

key	type	description
precision	number/null/undefined	to pretend human calculate, this option will fix precision after every step
numeralName	string	transform the function named with the numeralName

⚠Warn

The expression out of numeral will be not converted, So there is a wrong example:

import numeral from 'numeral';
// wrong
const square = (n) => n * n;
numeral(square(3.3)); // 10.889999999999999

// right
const square = (n) => numeral(n * n);
numeral(square(3.3));

// right
numeral(3.3 * 3.3)