gsap-utils

Guide GSAP utility methods for clamping, mapping, and interpolating in animations.

19|4|Updated Jan 11, 2026

Search Tags:#javascript #animation #mapping #gsap #clamp #interpolate #gsap-utils

Ready to run

npx skills add https://github.com/ZanebonoAlter/Syntopica --skill gsap-utils-zanebonoalter

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: gsap-utils
Source: https://github.com/ZanebonoAlter/Syntopica/tree/main/.agents/skills/gsap-utils
Command: npx skills add https://github.com/ZanebonoAlter/Syntopica --skill gsap-utils-zanebonoalter

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

GSAP.utils provides a collection of small, composable helpers to perform common animation-related calculations, such as clamping values, mapping ranges, normalizing, interpolating, and randomizing or snapping values, reducing boilerplate in GSAP-driven code.

Core Features & Use Cases

Clamp values to a range with gsap.utils.clamp(min, max, value) or its functional form.
Map inputs to outputs using gsap.utils.mapRange(inMin, inMax, outMin, outMax, value?) and its function form.
Normalize / Interpolate between numbers, colors, and objects with gsap.utils.normalize and gsap.utils.interpolate.
Random / Snap / Wrap utilities to generate random values, snap to steps, or wrap ranges for cyclic animations.
Use in ScrollTrigger, tween callbacks, or any JS logic that drives GSAP animations.

Quick Start

Create a reusable clamp function using gsap.utils.clamp(0, 100) and apply it to a scroll progress value.

Frequently Asked Questions about gsap-utils

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I clamp or map scroll progress values in GSAP animations?▼

Use gsap.utils.mapRange to translate scroll progress inputs to custom output ranges, and gsap.utils.clamp to restrict those interpolated values within safe minimum and maximum boundaries.

What is the difference between normalize and interpolate in GSAP utils?▼

GSAP utils normalize converts a value within a range to a zero-to-one progress fraction, while interpolate calculates intermediate values between numbers, colors, or objects based on that normalized progress.

Can I interpolate between colors and objects using GSAP utility methods?▼

Yes, gsap.utils.interpolate supports interpolating between colors and objects, enabling smooth transitions across JS animation workflows and timeline callbacks without manual color parsing.

How do I snap values to specific steps for cyclic GSAP animations?▼

Use gsap.utils.snap to increment values to defined steps, and pair it with gsap.utils.wrap to handle cyclic range wrapping for repeating timeline animations.

Does gsap-utils require external dependencies to map ranges in JavaScript?▼

No, gsap.utils provides composable helper functions relying solely on the core GSAP library, requiring no external dependencies to perform range mapping, normalizing, and clamping tasks.

What are the limitations of using GSAP utils functional forms for randomizing values?▼

GSAP utils functional forms generate random values within specified ranges but lack built-in seed control for deterministic outputs, requiring careful callback management to avoid layout thrashing.