Please make app foe websites crashing

Answer 1

For sake of joke and curiosity, there is a code posted by a Sololearn user and named "virus" or something like that.
It is not a virus: it's a JS alert that cannot be escaped and forces the user to force-close the browser or app running it.
Obviusly doesn't affect the server side but in a certain form it could force the user off the website.
The script could be injected with xss but I am proudly too noob for this.
if you asked a script to make DOS attacks I think you are seriously asking in the wrong place.
Enjoy learning, you may get rid of the "crashing desire".

Answer 2

No.