Nickelodeon held a preview for the series in the United States on May 1, 1999, following the television airing of the 1999 Kids' Choice Awards. The series officially premiered on July 17, 1999. It has received worldwide critical acclaim since its premiere and gained enormous popularity by its second season. A feature film, The SpongeBob SquarePants Movie, was released in theaters on November 19, 2004, and a sequel was released on February 6, 2015. On June 24, 2017, the series began airing its eleventh season with the episodes 'The Check-Up/Spot Returns.' In May 2017, the show was announced to be renewed for a 12th season.

What's the best answer to this question: do they still make new episodes of spongebob squarepants?
yes