Web Reference: Hey, guys in this TypeScript tutorial, we are going to talk about Optional Type In TypeScript, You learn how to make some keys in Type Optional by using ? modifier ...more This type is meant to model operations like await in async functions, or the.then() method on Promises - specifically, the way that they recursivelyunwrap Promises. The requestData is optional. I want to be able to call logData without having to specify the S type when I don't send the requestData to the method: instead of: this.logData('GET', data), I want to call this.logData('GET', data).
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