Mastering url.resolveScript in SuiteScript

Introduction

In NetSuite development, Suitelets and RESTlets often need to be accessed from other scripts, records, or even external systems. Hardcoding URLs is fragile because account domains, environments, and deployments can change. SuiteScript 2.x solves this problem with the url.resolveScript function, which dynamically generates the correct URL for a script deployment. This article explores how it works, when to use it, and the do’s and don’ts for best practice.

What is url.resolveScript?

url.resolveScript(options) is part of the N/url module in SuiteScript 2.x. It returns a string URL pointing to a Suitelet or RESTlet deployment. This ensures your scripts remain portable and environment-independent.

Syntax

define(['N/url'], function(url) {
    function example() {
        var suiteletUrl = url.resolveScript({
            scriptId: 'customscript_my_suitelet',
            deploymentId: 'customdeploy_my_suitelet',
            returnExternalUrl: false
        });
        log.debug('Suitelet URL', suiteletUrl);
    }
    return { execute: example };
});

Internal vs External Links

Internal Links

• Generated when returnExternalUrl: false (default).
• Accessible only to logged-in NetSuite users with proper permissions.

External Links

• Generated when returnExternalUrl: true.
• Publicly accessible if the deployment is configured for external access.
• Useful for integrations, APIs, or sharing links outside NetSuite.

Do’s

• Use url.resolveScript instead of hardcoding URLs for portability.
• Always specify both scriptId and deploymentId to avoid resolution errors.
• Choose returnExternalUrl wisely depending on whether the script is internal or external.
• Redirect users safely using the resolved URL in Client Scripts.
• Log/debug the generated URL to confirm correctness.
• Use it for integrations when exposing RESTlets externally.

Don’ts

• Don’t hardcode NetSuite domains or script URLs — they change between sandbox and production.
• Don’t forget to configure deployments for external access when using external URLs.
• Don’t use it for non-Suitelet/RESTlet scripts — it only works with these types.
• Don’t expose sensitive Suitelets/RESTlets externally without authentication.
• Don’t skip error handling — invalid IDs will break the resolved URL.

Conclusion

url.resolveScript is a best-practice tool in SuiteScript for dynamically generating URLs to Suitelets and RESTlets. By understanding the difference between internal and external links, and following the do’s and don’ts, you can ensure your NetSuite scripts are robust, portable, and secure. It’s one of the most important functions to master for modern NetSuite development.