Leveraging scanner-js within an Angular2 environment

Exploring ways to incorporate Scanner-JS into my Angular2 project, a tool I discovered while tinkering with the framework.

Being a novice in Angular2, this question might be elementary for some.

I successfully installed scanner-js via npm

npm install scanner-js --save

How can I effectively import this into my typescript file?

I tried the following (please bear with me)

import { scanner } from 'scanner-js'

Unfortunately, it did not work as expected and resulted in an error stating:

Uncaught ReferenceError: scanner is not defined

Any guidance on resolving this issue would be highly appreciated.

Thank you in advance.

javascriptangulartypescriptnpm

Answer №1

If you create an .d.ts file and include the following code:

declare module 'scanner-js';

Then import your module as specified. By default, when you declare a module in this way, it will have the type of any.

For more information, refer to the official handbook on working with other JavaScript libraries and module resolution.

For popular libraries, the types file .d.ts is often already defined by others, which can be installed using:

npm install --save-dev @types/d3

Answer №2

To update the line:

import { scanner } from 'scanner-js'

Modify it to: 

declare let scanner;

Also, don't forget to include the scanner.js script in your index.html file.

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