9 июн. 2015 г. · I generally I try to find ways to make optional parameter(s) as the end parameter(s) so I can just not pass vs. undefined. But obviously if you have many then ...

2 мая 2022 г. · You can define this: updateFunc: (flag?: boolean) => void; then the default value will be assigned to the flag parameter when the referenced function ( update ...

28 июл. 2019 г. · The types null and undefined are handled as separate types. The optional type is special, also allowing arguments to be left out of function ...

2 мая 2017 г. · It's very easy to mark a property as optional, you add ? after it: class NavItem { key: string; text: string; target: string; children?: NavItem[]; }

1 февр. 2021 г. · In TypeScript, a function/method parameter or object type's field that is marked as optional with the ? modifier means that it can be missing.

18 мар. 2022 г. · I want to pass the parameter d only if it exists, and I hope I don't have to do an if that checks this, because if I have more optional parameters it can get ...

5 авг. 2022 г. · This defined the generic type MyFunctionType to be a function whose parameter is optional in case the type of the parameter is null, undefined or the union of ...

26 авг. 2022 г. · I am trying to write all optional named parameters for a TypeScript function. But I am having a lot of trouble assigning a type to the parameters.

15 дек. 2020 г. · I am using the "mongodb" driver for nodejs. I am trying to add an optional parameter for ttl to this existing method.

14 июн. 2023 г. · I have a function doSomething(num, config?) that accepts a number and an optional config object that consists of a few optional parameters.