Social Media Giants Must Stand Trial on Addiction Claims (3)

Meta Platforms Inc., ByteDance Ltd., Alphabet Inc. and Snap Inc. must face trial over claims that they designed social media platforms to addict youths, a judge ruled, clearing the way for the first of thousands of cases to be presented to juries.

Los Angeles Superior Court Judge Carolyn B. Kuhl late Wednesday ruled against the companies on their last chance to avoid trial. Kuhl trimmed a negligence allegation from one case, but allowed other claims to proceed after lawyers have spent years pouring through evidence and dueling over legal theories.

The flood of lawsuits that started about three ...