Glint Template Type-Checking Reference

Overview

Glint provides TypeScript-powered type checking for Ember's GTS templates. A3 uses three Glint packages:

• @glint/template v1.7.2 — Template type primitives
• @glint/ember-tsc v1.0.7 — CLI type checker (ember-tsc --noEmit)
• @glint/tsserver-plugin v2.0.8 — IDE integration (autocomplete, errors in templates)

What Glint Does

Without Glint, TypeScript only checks .ts files — templates are invisible to the type system. Glint extends TypeScript to understand GTS template syntax:

• Validates component args match the Signature interface
• Catches typos in @argName references
• Enforces helper/modifier type signatures
• Provides autocomplete for args, yields, and component invocations
• Reports errors inline in VS Code via the tsserver plugin