up.element.styleNumber(element, prop)

Returns a computed CSS property value for the given element, cast as a number.

The value is cast by removing the property's unit (which is usually px for computed properties). The result is then parsed as a floating point number.

Returns undefined if the property value is missing. Returns NaN if the value cannot be parsed as a number.

Examples

let value = up.element.style(element, 'font-size')
// value is '16px'

value = up.element.styleNumber(element, 'font-size')
// value is 16