2026/8/22 -Optional parameters allow a JavaScript function to work even when some arguments are not provided. They make functions more flexible and reusable.
2026/10/23 -If the parameter has a default, write the default in the JavaScript itself: ... In JavaScript, @param tags make parameters required; brackets make one optional.
2026/1/7 -The issue is your OrderInfo has onSale defined. So either make it optional and in your order function so something like: if((orderInfo.onSale ?? true) === true ...
2026/5/22 -The optional chaining (?.) operator accesses an object's property or calls a function. If the object accessed or function called using this operator is ...
2026/9/24 -A default value makes the parameter optional for callers and gives it a type without undefined inside the function. The type is inferred from the default, so ...
2026/8/24 -TypeScript optional parameters are a tool for genuine configuration variance, not a substitute for admitting a function is doing two distinct jobs. Bringing It ...
2026/9/23 -Optional parameters allow functions to be called without providing values for every parameter, making them more flexible. · Optional parameters can be omitted ...
2026/5/10 -All values are strings. If you need to make a parameter optional and still match the base route, you can use a ? after the parameter name (like ...
2026/6/27 -The ? makes the parameter optional. Default Parameters. You can also set default ...
2025/11/10 -Just like other blocks, JavaScript uses {} instead of indentation. Like Python we can make parameters optional by setting default values, as seen with b above.