Verified answer

i think you're mixing up your spiders

there are spiders that build webs, and ones that dont- they hunt

it depends on the species

and some that use a trap door technique

but i think they all or most have to suck up the digested prey

They have fangs and a mouth.

They build a web after they catch their prey because they need to save some for later.

They inject there food with a poison that turns the bugs insides to a liquid. Then they have like a staw thing that they suck the insides out with.