For example:

Only the first type parameter in a list is constrained:They can also be declared as constructor functions, as described in the next section:The compiler infers constructor functions based on this-property assignments, but you can make checking stricter and suggestions better if you add a Note: Error messages only show up in JS codebases with Unfortunately, this means that constructor functions that are also callable cannot use When Javascript classes extend a generic base class, there is nowhere to specify what the type parameter should be. Kind of like introducing type inception, down a rabbit hole.Now a way to get around this would be to enable the ability to drill down into types from the Intellisense popup, maybe by right clicking on a type in the popup.Really like this idea. I came to this issue because I currently use Successfully merging a pull request may close this issue. In my previous post, we learned javascript documentation framework - JSDOC tutorials, In this post, We are going to learn JSdoc function tags with examples. allow strings AND numbers). As type-checkers go, in my opinion, JSDoc is neither among the best or the most beginner friendly options out there – the learning curve for the features you listed here is about the same, but the long term payoff of using a richer type-checker like TypeScript make it worth while for anyone who cares about type safety. That gets really hard to show as well as to grok.Now if you wanted to organize your code a bit. JSDoc Reference The list below outlines which constructs are currently supported when using JSDoc annotations to provide type information in JavaScript files. This is something I really would like as it'd make my life 9000% easier.What we do is first play with the docblocks to get it correctly working in WebStorm, and then the VSCode guys pray it also works there. When using JSDoc's syntax for optional parameters, you Indicates that the parameter is optional. In the TypeScript implementation, because types are already part of the system, we allow the JSDoc type annotation to be elided, as in the example above. This lets you cast types to other types by adding a You can also import declarations from other files using import types. documenting record types. parentheses and separated by In the example code below, data item VERS-NUM is defined as a 2-byte binary integer containing a version number. Only the first type parameter in a list is constrained:They can also be declared as constructor functions, as described in the next section:The compiler infers constructor functions based on this-property assignments, but you can make checking stricter and suggestions better if you add a Note: Error messages only show up in JS codebases with Unfortunately, this means that constructor functions that are also callable cannot use When Javascript classes extend a generic base class, there is nowhere to specify what the type parameter should be.
Specifies the name of a symbol. : number) => boolean} Predicate */ - A generic parameter that flows through to the return type {{ serious(): string }} Seriousalizable - must have a serious methodArgument of type 'number' is not assignable to parameter of type 'string'.Argument of type 'number' is not assignable to parameter of type 'string'.Value of type 'typeof C' is not callable.

This syntax is TypeScript-specific and differs from the JSDoc standard:import types can also be used in type alias declarations:import types can be used to get the type of a value from a module if you don’t know the type, or if it has a large type that is annoying to type:Of course, any of these types can be declared using TypeScript syntax in a single-line Use comma or multiple tags to declare multiple type parameters:You can also specify a type constraint before the type parameter name. : number }} SpecialType */ {(data: string, index?
Did you mean to include 'new'?Value of type 'typeof C' is not callable. This indicates that the type is either the specified type, or