Eta

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Eta is a lightweight and blazing fast embedded JS templating engine for Node, Deno, and the browser. It is written in TypeScript and emphasizes great performance, configurability, and small bundle size.

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At a glance

Pricing

Open Source

Free tier

Yes

API

Yes

Skill level

Technical

About

What is eta?

Eta (η) is a lightweight and blazing fast embedded JavaScript templating engine designed for use across Node.js, Deno, and browser environments. Written entirely in TypeScript, Eta prioritizes high performance, extensive configurability, and a minimal bundle size of only ~3.5 KB minzipped. It boasts zero dependencies and offers robust features such as precompilation, partials, async support, blocks, and layout capabilities. Developers can customize delimiters and tags, benefiting from reliable error reporting and ES Modules exports. Eta's syntax is easy to learn, making it an efficient choice for generating dynamic content in web applications.

Best used for

Ideal for developers who need to efficiently generate dynamic content, integrate templates across Node, Deno, and browser environments, and build high-performance web applications. Especially valuable for projects requiring a lightweight, fast, and configurable templating solution written in TypeScript.

Common actions

generate dynamic content

template JavaScript

build web applications

integrate templates

collaborationautomated workflowdeepfakelow-code/no-codeopen-sourceface swappingworkflows"AI Agents"github copilot

Capabilities

Key features

Embedded JS template engine
Node, Deno, browser support
Lightweight, fast, pluggable
Written in TypeScript
Zero dependencies
Configurable plugins
Precompilation, partials, async

Target Audience

developer

Integrations

visual-studio-codeeslintwebpacknode-redkoavitedocusaurusswagger-typescript-api+ 3 more

Pricing & Plans

Open Source

Free

FAQs

What environments does Eta support?

Eta is designed to be highly versatile, supporting Node.js, Deno, and browser environments. This broad compatibility allows developers to use the same templating engine across various parts of their application stack, from server-side rendering to client-side dynamic content generation.

What are the key performance benefits of using Eta?

Eta is engineered for speed and efficiency. It is lightweight, with a minimal bundle size of approximately 3.5 KB minzipped, and boasts zero dependencies. Its design prioritizes fast execution, making it an excellent choice for performance-critical applications where quick template rendering is essential.

Can Eta templates be precompiled?

Yes, Eta supports precompilation of templates. This feature allows templates to be compiled into JavaScript functions ahead of time, which can significantly improve performance by reducing the overhead of parsing and compilation during runtime, especially in production environments.

Does Eta offer support for layouts and partials?

Eta provides comprehensive support for both layouts and partials. This enables developers to create reusable template components and define overarching page structures, promoting modularity and reducing code duplication in their web projects. It streamlines the development of complex UIs.

How does Eta handle errors in templates?

Eta features robust error reporting capabilities. It is designed to provide clear and helpful error messages, making it easier for developers to debug and fix issues within their templates. This reliability contributes to a smoother development workflow and more stable applications.

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