You'll need to import the javascript file in your website before starting from this link.
The App Review Add-on enables you to prompt your users to rate and review your app on respective app store listing page.
Apple App Store App Review
To show Native App Review
Notes on prompting for a review
The Apple App Store controls the actual display of this alert so it may not show for some cases. This is to prevent frequent rating prompts which can be irritating for users. See more details in Apple's Documentation
