校验对象的数据类型、toString、call、indexOf、stringify、keys、length Packages

parses number and unit, '20px' into [20, 'px']

Regex to match a percentage value

Percentages: a JavaScript and PHP class for calculating percentages and rounding them through the largest remainder method

A tool css for converting pixel measurements to % for grids.

interpolate values in a css string

a number-editor with units like % and px

Modulo operations based on mathematical approach