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Functions
1. How to type annotate functions?
Level: Expert | Frequency: High
2. How to set the return type of a function as promise?
Level: Expert | Frequency: High
3. How to make a parameter of a function optional in TS?
Level: Expert | Frequency: High
4. How to receive a function as a parameter?
Level: Expert | Frequency: High
5. How to set types for parameters of multiple, predefined types
Level: Expert | Frequency: High
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Literal Types
Classes
Type aliases
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Functions
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