Generally, it is recommended to apply eyeshadow before mascara. This is because eyeshadow can sometimes fall onto the lashes while applying, and applying mascara first can make it more difficult to clean up any stray eye shadow.

Additionally, applying eyeshadow first allows you to create a more seamless and cohesive eye look, as you can blend the shadow into the lash line to look more natural. Once you apply your eyeshadow, you can then apply your mascara to enhance your lashes and complete your eye look.

However, it totally depends on personal preference and the look you want to achieve. Do experiments with your looks and choose the best for you.