TikTok is one of Meta's biggest rivals and has soared in popularity in recent years, particularly with younger audiences, and now has about 170 million users in the U.S. In April, President Joe Biden signed a law that would require ByteDance to divest the app, or companies such as Apple and Google as well as internet hosting providers would have to stop supporting it.

The unanimous ruling on Friday by a three-judge panel of the U.S. Court of Appeals in Washington, D.C., rejected TikTok's argument that the law is unconstitutional and violates the First Amendment rights of its users. TikTok said later Friday that it will ask the U.S. Supreme Court to overturn the appeals court decision.