Advent of TypeScript is a month-long event running from December 1 to Christmas, featuring daily TypeScript challenges. Participants can test their skills, climb the leaderboard, and engage with the T...

Advent of TypeScript is a month-long event running from December 1 to Christmas, featuring daily TypeScript challenges. Participants can test their skills, climb the leaderboard, and engage with the T...

Advent of TypeScript is a month-long event running from December 1 to Christmas, featuring daily TypeScript challenges. Participants can test their skills, climb the leaderboard, and engage with the T...

Main goal The ultimate goal of this PR is to allow primitive types in object unions to act as discriminants, even when there are no unit/literal types involved. Some examples of this are as follows...

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Fixes #33912. Fixes #33014. Motivation Sometimes we want to write functions whose return type is picked between different options, depending on the type of a parameter. For instance: declare const ...