Functions
TS Default Parameters
Using Default Parameters
TypeScript default parameters provide fallback values with type inference.
Introduction to Default Parameters
In TypeScript, default parameters allow you to provide fallback values for function parameters. This feature is especially useful when you want to ensure that your functions can operate with missing arguments. If a function is called without providing a value for a parameter with a default, TypeScript automatically assigns the default value to that parameter.
Syntax of Default Parameters
The syntax for default parameters in TypeScript is straightforward. You simply assign a value to the parameter in the function declaration. This value will be used if no argument is provided during the function call.
Type Inference with Default Parameters
TypeScript is capable of inferring the type of parameters with default values, even if you don't explicitly specify the type. This inference is based on the type of the default value provided.
Order of Parameters
It's important to note that parameters with default values should ideally be placed after any required parameters. This is because TypeScript uses the order of arguments to match them with parameters, and placing default parameters first can lead to unexpected behavior.
Combining Default Parameters with Other Features
Default parameters can be combined with other TypeScript features such as rest parameters and overloads. This combination allows for flexible and powerful function signatures.
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