What steps should be taken if a typings (or tsd) file cannot be found?

Question

What steps should be taken if a typings (or tsd) file cannot be found?

After reading through the TypeScript handbook, I realized that I couldn't find the solution to my problem.

What are my options if I'm using a library without existing typings?

The first option is to create the typings file myself, but I'm hesitant to do so.

I vaguely recall something about a 'declare' keyword - could that be an alternative?

Or perhaps there's a solution within the tsconfig?

I believe there must be a way to declare the variable (type) globally so it works every time I need it.

And I assume there's also a method to restrict its availability to just one file.

Naturally, including a typings file would be ideal, but that may not always be an option.

typescript strong-typing definitelytyped tsd

Answer 1

Answer №1

To eliminate errors quickly, you can simply add

declare var MyUntypedLibrary: any;

at the beginning of your code, using MyUntypedLibrary as the global reference for your dependency.

If you require this reference in multiple files and want to avoid redundancy, place it at the top of any file, above namespaces, so it is accessible throughout the project. For numerous untyped dependencies, consider creating a separate ts-file to define them.

Please note that this approach works well with local modules. It may become more complex when dealing with external modules and attempting to establish a single source for implicit dependencies across all. However, individual modules should manage their own dependencies internally for better organization.

Answer 2

To eliminate errors quickly, you can simply add

declare var MyUntypedLibrary: any;

at the beginning of your code, using MyUntypedLibrary as the global reference for your dependency.

If you require this reference in multiple files and want to avoid redundancy, place it at the top of any file, above namespaces, so it is accessible throughout the project. For numerous untyped dependencies, consider creating a separate ts-file to define them.

Please note that this approach works well with local modules. It may become more complex when dealing with external modules and attempting to establish a single source for implicit dependencies across all. However, individual modules should manage their own dependencies internally for better organization.

Answer 3

Answer №2

If you want to define your own TypeScript definition file (.d.ts), the ideal approach would be to clone the https://github.com/DefinitelyTyped/DefinitelyTyped repository, make your additions, and then submit a pull request for review. However, if you're looking for a faster solution, there are other options available.

One option is to create a basic definition file that meets your specific requirements and include it directly in your project. This way, you can avoid the wait time associated with having your definitions accepted and merged into the DefinitelyTyped repository.

Even if your definition file is simple, it's still beneficial to submit a pull request. Remember, some definition is better than none!

For detailed instructions on creating your own definition file, visit:

Here is a simple example to get you started:

 interface JQuery {

    /* wrapped plugins */

    dynatree(options: any): any;

    multiselect(): JQuery;
    multiselect(MultiSelectSettings): any;
    multiselect(command: string): any;

    ajaxSubmit(options: any);
    layout(options: any);

    colpick(options?: any);
    colpickHide();

    idcDataTable(options?: any);

    dragscrollable(options: any);

    /* wrapped plugins - END */
}

interface JQueryStatic {
    layout: any;

    fileDownload: any;

    pnotify: any;

    sha256(input: string): string;

}

Answer 4

If you want to define your own TypeScript definition file (.d.ts), the ideal approach would be to clone the https://github.com/DefinitelyTyped/DefinitelyTyped repository, make your additions, and then submit a pull request for review. However, if you're looking for a faster solution, there are other options available.

One option is to create a basic definition file that meets your specific requirements and include it directly in your project. This way, you can avoid the wait time associated with having your definitions accepted and merged into the DefinitelyTyped repository.

Even if your definition file is simple, it's still beneficial to submit a pull request. Remember, some definition is better than none!

For detailed instructions on creating your own definition file, visit:

Here is a simple example to get you started:

 interface JQuery {

    /* wrapped plugins */

    dynatree(options: any): any;

    multiselect(): JQuery;
    multiselect(MultiSelectSettings): any;
    multiselect(command: string): any;

    ajaxSubmit(options: any);
    layout(options: any);

    colpick(options?: any);
    colpickHide();

    idcDataTable(options?: any);

    dragscrollable(options: any);

    /* wrapped plugins - END */
}

interface JQueryStatic {
    layout: any;

    fileDownload: any;

    pnotify: any;

    sha256(input: string): string;

}

What steps should be taken if a typings (or tsd) file cannot be found?

Answer №1

Answer №2

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