all flex options css code example

Example 1: flexbox

Please read flexbox & grid in CSS TRIX, 
make hands-on project watching (WESBOS videos - it's really useful)
also try [FLEXBOX - froggy] and [GRID - garden] games

Example 2: flex property in css

The flex property is a shorthand property for:

flex-grow
flex-shrink
flex-basis