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How to iterate over enums in TypeScript (with code examples)

  • Enums in TypeScript enable mapping short lists of values into numbers, facilitating comparisons.
  • Different approaches for iterating over enums in TypeScript are explored in this article.
  • Numeric Enums map keys to numeric values and can be iterated using Object.keys() and Object.entries().
  • String Enums map keys to string values and are best iterated using Object.values().
  • Object methods like Object.keys() and Object.values() can be used to iterate over enums.
  • Iterating over enum values using for loops is another approach, allowing reverse mapping in numeric enums.
  • By converting an enum to a typed array, strict typing of enum keys can be preserved for iteration.
  • Lodash utility method forIn() can also be used to iterate over enums in TypeScript, providing flexibility in filtering keys.
  • A reusable utility function getEnumKeys() is introduced for consistent enum key extraction across codebases.
  • Multiple techniques for iterating over enums in TypeScript are discussed, emphasizing the importance of choosing the right method based on requirements.

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