Flexible function
name first param * second param * next params description
fw min size max size min-width, max-width adapts to width
fh min size max size min-height, max-height adapts to height
fmin min size max size min-size, max-size adapts to min height or width desktop size
fmax min size max size min-size, max-size adapts to max height or width desktop size
fd min size max size min-width, min-height, max-width, max-height adapts to desktop size
@@include('./example/flexible.html') @@include('./config/flexible.html')