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World Congress 2024 • Aug 20, 2024 • Session details

Oh CommonJS! Why are you mESMing with me?

Jolo

Tired of ESM and CommonJS clashes? The JavaScript ecosystem is moving on. Embrace native ECMAScript Modules to slash bundle sizes and eliminate technical debt.

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#1 about 6 min

Diagnosing unexpected token export errors in Jest test runners

Upgrading dependencies can trigger syntax errors when CommonJS test runners encounter modern ESM-only packages.

#2 about 2 min

Implementing module systems to scale server-side JavaScript execution

Splitting and reusing code becomes necessary as JavaScript execution shifts to complex server environments.

#3 about 3 min

Comparing CommonJS and ECMAScript module syntax and execution behaviors

Synchronous require statements in legacy CommonJS contrast with the asynchronous import standards of modern ECMAScript modules.

#4 about 2 min

Analyzing module system adoption trends across the package ecosystem

Despite most packages relying on older standards, the wider developer ecosystem shows a clear adoption trend toward native modules.

#5 about 5 min

Benchmarking execution speed and bundle size across module systems

Effective tree shaking makes bundled ECMAScript modules significantly smaller and faster to execute than CommonJS equivalents.

#6 about 6 min

Migrating legacy toolchains to native ECMAScript standard environments

Transitioning workflows to native modules and modern alternatives like Vitest eliminates ongoing legacy compatibility overhead.

Matching moments

5:14 min

Addressing production environments, module tests, and ecosystem compatibility

Daniel Roe · JS Congress

4:20 min

JavaScript runtime competition and built-in features

2:28 min

Expected features and performance defaults in modern JavaScript frameworks

Sasha Shynkevich · LIVE

3:47 min

Embracing composable architecture within the modular JavaScript framework ecosystem

Josh Goldberg · JS Congress

3:49 min

Evolution and dominance of full stack JavaScript ecosystems

Michael Bromley · WWC 2022

3:06 min

Backward compatibility issues between CommonJS and ES6 modules

Priscila Oliveira · WWC 2023

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