Share JavaScript Code Between Lightning Web Components

Hello Friends, as you know that writing the reusable code good into Development /implementation .

Create Shared Code

To share code between components, create an ES6 module and use the standard export statement to export the functionality that your module exposes. Your module can use the standard import statement to use other shared modules

utils LWC Component 

  export default shpwToast (variant='info', mode='dismissable', title, message) { 
   const event = new ShowToastEvent({
        title: title,
        message: message,
        mode : mode,
        variant : variant
    });
    return event;
}

Note :- with in this component no html will be there.

Use Shared Code

To use the shared code in a JavaScript file, use the standard import statement. For example:

import {
    shpwToast 
} from 'c/utils';

This line imports the utils module in the c namespace.