Math.format

Method to check values and format numbers.

Usage

Math.format(34.5279, {'round': -2}); // Returns 34.53
Math.format(34.5279, {'round': 0}); // Returns 35
Math.format(34.5279, {'round': 1}); // Returns 30

Math.format(34.5279, {'floor': -2}); // Returns 34.52
Math.format(34.5279, {'floor': 0}); // Returns 34
Math.format(34.5279, {'floor': 1}); // Returns 30

Math.format(34.5279, {'ceil': -2}); // Returns 34.53
Math.format(34.5279, {'ceil': 0}); // Returns 35
Math.format(34.5279, {'ceil': 1}); // Returns 40

Math.format(34.5279, {'min': 40}); // Returns 40
Math.format(34.5279, {'max': 30}); // Returns 30

Math.format('a string', {'ifNaN': 'custom value'}); // Returns 'custom value'
Math.format('', {'ifEmpty': 'custom value'}); // Returns 'custom value'
Math.format(undefined, {'ifEmpty': 'custom value'}); // Returns 'custom value'
Math.format(Infinity, {'ifInfinity': 'custom value'}); // Returns 'custom value'

Math.format(2, {'preProcess': '(x + 2) * 3'}); // Returns 12
Math.format(2, {'postProcess': '(x + 2) * 3'}); // Returns 12
Math.format(2, {'preProcess': '(x + 2) * 3', 'max': 10}); // Returns 10
Math.format(2, {'postProcess': '(x + 2) * 3', 'max': 10}); // Returns 12

Math.format(2, {'prefix': 'hello '}); // Returns 'hello 2'
Math.format(2, {'suffix': ' times'}); // Returns '2 times'
Math.format(2, {'prefix': 'hello ', 'suffix': ' times'}); // Returns 'hello 2 times'

Unit tests

Unit tests are made with Mocha. Just launch npm test to run it.

Contribute

Be careful that I use Git-flow to organize the repository branches, so make your pull requests to the develop branch.

$ npm install
$ npm test
$ npm run watch

Webpack will compile your code in the build directory.

Source

• Some very usefull functions come from the marvelous Mozilla Developer Network.
• A nice patch from TheIronDeveloper to workaround the lack of support for the toLocaleString function by Safari.