Add "prefix", "suffix" & "calc" arguments to the output array for fields

[aristath]

This will allow more complex logic and handling most cases.

Prefix: for example to make the output part of a media query
Suffix: for !important etc
calc: so that the value can be calculated based on a user function before output

[ghost]

Pure awesome
thanks Aris

[aristath]

Example:

        'output'      => array(
            'element'  => 'body #page',
            'property' => 'color',
            'prefix'   => '@media ( max-width: 1200px ) {',
            'suffix'   => '}',
            'callback' => 'kirki_twentytwelve_alter_color',
        )

and then a dummy callback function could look like this:

/**
 * Darkens the color a bit
 */
function kirki_twentytwelve_alter_color( $color ) {
    return Kirki_Color::adjust_brightness( $color, -50 );
}

[MikeiLL]

This looks promising! Going to try using for font-sizing in media queries.

[MikeiLL]

NOTE: See this post for updated approach.