llm.getRemainingFreeUsage.promise() SuiteScript Syntax

The documented SuiteScript 2.1 syntax calls llm.getRemainingFreeUsage.promise() and attaches a .then() callback. This is a syntax sample, not a functional script or a description of the returned result. It shows where to add surrounding script logic while the asynchronous operation is pending and when its success callback runs.

What is the documented syntax?

Use the member with .promise() and attach a callback with .then(), as shown in the documentation:

1// Add additional code
2...
3 
4llm.getRemainingFreeUsage.promise().then(function(result) {
5    // Work with the result
6});
7 
8...
9// Add additional code

The documentation explicitly identifies this as a syntax sample rather than a functional example. The ellipses and comments indicate that additional script code belongs before and after the call. The callback receives result, but the supplied documentation does not define that value’s type, fields, or interpretation. Avoid treating this snippet as a complete implementation or inferring behavior that is not documented for the member.

How does the promise behave in SuiteScript 2.1?

A promise is a JavaScript object representing the eventual result of an asynchronous process. When created, it is pending. Once the associated process completes, it becomes either fulfilled when successful or rejected when unsuccessful.

While a promise is waiting, other segments of the script can execute. A success or failure callback attached to the promise runs when the process is complete. A promise can succeed or fail only once: after it changes to fulfilled or rejected, its value cannot change again.

The .then() callback in the syntax sample is the success-oriented portion of that flow. The sample does not show a failure callback, so it should not be read as a complete error-handling pattern for this specific member.

Which SuiteScript contexts support promises?

SuiteScript 2.1 provides promise APIs for selected modules. All client scripts support promises in SuiteScript 2.1. Starting with NetSuite 2021.1, a subset of server scripts also supports promises.

That distinction matters when reviewing where to place promise-based logic. Client-script support is stated broadly, while server-script support is limited to a subset of script contexts. The source material does not identify which server script types apply to this member, so confirm the applicable promise API support before relying on the syntax in a server script.

For broader syntax references, see llm.getRemainingUsage() Syntax in SuiteScript 2026.2, N/http Module Syntax for SuiteScript Redirects, and NetSuite Record Syntax for SuiteScript 2.x Operations.

Who This Affects

• SuiteScript 2.1 client-script developers using promise-based APIs.
• Server-script developers who need to verify whether their script context is among those that support promises beginning with NetSuite 2021.1.
• Code reviewers assessing whether a syntax sample has been mistaken for a complete, functional script.

Key Takeaways

• llm.getRemainingFreeUsage.promise() is documented with a .then(function(result) { ... }) callback pattern.
• The published snippet is syntax only, not a functional example.
• Promises begin as pending and resolve once as either fulfilled or rejected.
• SuiteScript 2.1 supports promises in all client scripts and in a subset of server scripts starting with NetSuite 2021.1.
• The supplied material does not define this member’s returned result or provide a complete failure-handling example.