Prototype Javascript Framework

underscore() -> string

Converts a camelized string into a series of words separated by an underscore ("_").

Example

'borderBottomWidth'.underscore();
// -> 'border_bottom_width'

Note

Used in conjunction with String#dasherize, String#underscore converts a DOM style into its CSS equivalent.

'borderBottomWidth'.underscore().dasherize();
// -> 'border-bottom-width'