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World Congress 2025 • Aug 20, 2025 • Session details

Marko.js: Unsung Hero of Scalable Web Frameworks

Eugene Fidelin

Battle-tested by eBay since 2014, Marko.js quietly pioneered modern frontend architecture. Discover why this server-first framework processes requests twice as fast as React.

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#1 about 4 min

Multi-page application challenges and rendering options

Current approaches for building universal applications demand clear trade-offs between performance optimization effort and ecosystem maturity.

#2 about 3 min

Marko template syntax and core component structure

Using a superset of HTML enables familiar frontend component lifecycle structures natively within custom tags.

#3 about 2 min

Automatic dead code elimination and javascript reduction

The framework compiler analyzes interactivity during build time to actively prevent shipping static component javascript to the client.

#4 about 1 min

Progressive rendering for faster actionable interfaces

Sending functional HTML and asset chunks down the wire enables users to interact with page sections before full load.

#5 about 2 min

High server performance via dual compilation targets

Executing string concatenation for the server build while deploying a virtual DOM to the browser minimizes rendering overhead.

#6 about 2 min

Developer ecosystem and Marko Run tool integration

Standardizing around modern tooling like Vite and TypeScript simplifies constructing isolated components using file-based routing.

#7 about 2 min

History and evolution of advanced performance features

Extensive testing at eBay drove the early development of modern web strategies like islands architecture and server streaming.

#8 about 3 min

Syntax opinions and community adoption visibility barriers

Unconventional global component imports and a lack of mainstream marketing create friction for developers exploring the technology.

#9 about 2 min

Tooling limitations and artificial intelligence generation struggles

A smaller open-source footprint directly restricts integrated development environment extensions and degrades code generation accuracy.

#10 about 2 min

Practical steps for testing and adopting Marko

Leveraging provided node package manager commands and studying the eBay UI widget repository demonstrates production-grade implementation.

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