35 Default Function Parameter Typescript HNXplNtWHVM

Web Reference: In this tutorial, you will learn about the TypeScript default parameters to set a value that a parameter will be assigned if it is omitted or the undefined is passed. Oct 19, 2025 · Default parameters in TypeScript are values that are assigned to function parameters at the time of function definition. If a caller does not provide a value for a parameter with a default value, the default value will be used instead. @Rainning It's kind of tricky, but that's the default value of the whole parameter object. It allows you to call the function without providing any arguments. Because that's there, you could call this function like so: sayName(). If you remove the ={}, you'd have to at least pass in an empty object.

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