Odoo 15 is now using the new JS Framework called OWL to inherit any component in Odoo JS you will use the OWL Component patching method located in web module here is the documentation of patching OWL Components.

Example:

    const { patch } = require('web.utils');
    
    patch(MyComponent.prototype, "test_patching_my_component", {
        setup() {
            this._super(...arguments);
            console.log("patch patch patch setup");
        }
    });

Here is the complete example of the js file.

Happy to help :) an upvote will be awesome

Hello Amr,

Thanks for your replay.

Yes please help me if you found anything.