Dan Holloran (@grimicorn)

@grimicornSt. Louis, MOJoined May 2026

Senior Full Stack Developer with 14+ years building performant, scalable web applications. Passionate about architecture, mentorship, and finding the right tool for the job.

@grimicornSt. Louis, MOJoined May 2026

Senior Full Stack Developer with 14+ years building performant, scalable web applications. Passionate about architecture, mentorship, and finding the right tool for the job.

Dan Holloran

About

Available for

Dan Holloran's blogs

Recently published

The Soft Navigations API: Core Web Vitals Finally Work in SPAs

Declarative Shadow DOM: Web Components That Render Before Your JavaScript Does

OPFS: A Real File System in the Browser

CSS light-dark(): Stop Duplicating Your Dark Mode Colors

URLPattern: The Browser Finally Has a Built-In Router

Dan Holloran

About

Available for

Dan Holloran's blogs

Recently published

The Soft Navigations API: Core Web Vitals Finally Work in SPAs

Declarative Shadow DOM: Web Components That Render Before Your JavaScript Does

OPFS: A Real File System in the Browser

CSS light-dark(): Stop Duplicating Your Dark Mode Colors

URLPattern: The Browser Finally Has a Built-In Router

Dan Holloran

About

Available for

Dan Holloran's blogs

Recently published

The Soft Navigations API: Core Web Vitals Finally Work in SPAs

Declarative Shadow DOM: Web Components That Render Before Your JavaScript Does

OPFS: A Real File System in the Browser

CSS light-dark(): Stop Duplicating Your Dark Mode Colors

URLPattern: The Browser Finally Has a Built-In Router

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Dan Holloran

About

Available for

Dan Holloran's blogs

Recently published

The Soft Navigations API: Core Web Vitals Finally Work in SPAs

Declarative Shadow DOM: Web Components That Render Before Your JavaScript Does

OPFS: A Real File System in the Browser

CSS light-dark(): Stop Duplicating Your Dark Mode Colors

URLPattern: The Browser Finally Has a Built-In Router