President Biden will not enforce a ban on TikTok that is set to take effect Sunday, a U.S. official said, leaving its fate to Donald Trump.

TikTok has gone dark in the U.S., the result of a federal law that bans the popular social media app for millions of Americans.

Congress last year in a law signed by President Joe Biden required that TikTok’s China-based parent company ByteDance divest the company by Jan. 19 or risk getting banned in the U.S.

President Joe Biden's administration said it will be up to President-elect Donald Trump to implement the ban on TikTok, which is set to take effect in two days after the Supreme Court upheld the law Friday.

TikTok said it would “go dark” on Sunday unless President Joe Biden’s administration offered assurance that it would not enforce a ban upheld Friday by the Supreme Court for the app’s U.S. operations to be sold or booted over “national security concerns.

The White House has looked into options to keep TikTok accessible to its 170 million American users if a ban that is set to go into effect Sunday continues as planned.

A ban on the popular app is set to start Sunday, although the Supreme Court could rule anytime on whether to uphold it.

President Joe Biden is reportedly not planning to enforce TikTok’s ban on Jan. 19, and is opting to leave the fate of the app in President-elect Donald Trump’s hands. Speaking on condition of anonymity,

President-elect Donald Trump, who once called to ban TikTok, has since pledged to keep it available in the U.S.

The Biden administration doesn't plan to take action that forces TikTok to immediately go dark for U.S. users on Sunday, an administration official told ABC News.