Write more readable code with TypeScript 4.4

TypeScript 4.4 introduces a feature called control flow analysis of aliased conditions, which enhances code readability by allowing more expressive code with less repetition. This feature addresses a long-standing issue of indirect type narrowing via constants, enabling developers to write code that better captures intent without encountering errors seen in previous versions. For instance, it allows for more expressive functions by correctly narrowing types, as demonstrated with a simple addition function that can process both numbers and strings. This improvement has been well-received by the TypeScript community, as it facilitates maintaining cleaner codebases. The release notes for TypeScript 4.4 highlight this and other exciting features, showcasing the ongoing efforts of the TypeScript team to enhance the language and improve code readability.

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