Inspired by Decimal rounding polyfill by MDN.

Installation

Install using npm:

$ npm install round10

Usage

Use in your project:

$ npm install --save round10

and in your code:

var round10 = require('round10').round10;
round10(55.55, -1); // 55.6

Optionally, you may use the polyfill which extends the global Math object:

require('round10').polyfill();
Math.round10(55.55, -1); // 55.6

Check out the code

$ git clone git@github.com:jhohlfeld/round10.git
$ cd round10
$ npm install

Test using mocha:

$ npm install -g mocha
$ mocha test/test.js