Converts a string to snake case.
string to convert
a snake-cased string
var str = snakecase( 'fooBar' ); // returns 'foo_bar'
var str = snakecase( 'foo-bar' ); // returns 'foo_bar'
var str = snakecase( 'foo_bar' ); // returns 'foo_bar'
Converts a string to snake case.