From jQuery Spaghetti to a Vue App, One Widget at a Time
Your frontend still works, which is exactly why you are afraid to touch it. We migrate it incrementally, so every change is small, tested, and reversible.
The way this stack usually breaks
These are the problems we keep seeing, in the order we usually meet them.
The app is one giant document.ready()
State scattered across DOM attributes, localStorage, and prayers. We map it before touching anything, then replace it piece by piece.
SEO panic
Nobody wants a SPA that Google renders as a blank page. Our migrations keep content in the HTML, so rankings survive the transition.
Shared state nobody can see
Mutated globals, event chains firing in order-dependent ways. We convert them into an explicit store so changes stop being archaeology.
Big-bang rewrites keep failing
The widget-by-widget approach means every component ships when it is done, not when the whole app is done. Value lands weekly.
An e-commerce checkout that survived the migration
A retailer came to us with a jQuery checkout where the shipping calculator ran on eleven different DOM events, some of them duplicated. We wrapped the checkout in a Vue island first, reproduced every calculation in unit tests from real orders, and swapped it in behind a feature flag for 5% of traffic. Conversion went up slightly, error rates dropped by half, and the team has not touched jQuery for that flow since.
Questions about jQuery to Vue Migration
Do you rebuild the whole frontend in Vue?
Only if it makes sense. The default is the strangler pattern: new features in Vue, existing screens migrated one at a time, the old jQuery code kept running until the last screen is done.
How do you avoid breaking what already works?
Each migrated widget gets a small test suite before we swap it in, and we ship behind a feature flag whenever the team wants extra caution. Rollbacks are one commit away.
What about older browsers my users still have?
We look at your analytics before deciding on targets. If a chunk of users is stuck on IE11 or old Safari, we either polyfill or keep that part of the UI on the legacy stack a bit longer.
Read the write-ups
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