A jQuery to Vue migration starts by untangling what the current pages actually do. A click handler may update the DOM, trigger another plugin and leave shared state behind for the next screen. On a mixed PHP or server-rendered site, that behavior often spans templates and scripts. I map those chains before replacing selected features with tested Vue 3 components.
I start inside the existing stack. First I trace selectors, event listeners, plugin callbacks and shared objects across the current templates. That reveals which jQuery features can move on their own and which still depend on server-rendered markup or another plugin. The migration order comes from those dependencies.
The difficult part is rarely the jQuery syntax. It is the chain of side effects around it: one handler changes a class, another plugin reads that class, and a later AJAX response replaces the same element. I add tests around that behavior before the feature moves, so the replacement component has something concrete to match.
New components can then mount inside the existing pages one feature at a time. The rest of the site stays on its current stack while each selected area is separated from global state and given a clear boundary. This keeps the backend out of the rewrite unless a feature genuinely needs it, and gives the team reviewable steps instead of one large switch.
What the frontend migration delivers
- Tests describe behavior that jQuery used to hide across handlers and plugins
- Components with explicit state, Vite tooling and TypeScript-ready boundaries
- The staged scope lets existing pages stay in service
- Documentation, handover and post-launch support agreed in scope
Can you migrate without rewriting everything at once?
Yes. A component can mount inside a server-rendered page while jQuery continues to run. I move one dependency chain at a time instead of replacing the whole frontend in one release.
Our jQuery code has no tests or documentation. Is that a problem?
It changes the first step. The audit traces behavior through handlers, plugins and DOM updates. I add tests before replacing each feature, so the new version has an observable baseline.
How long does the frontend migration take?
It depends on the number of screens, plugin dependencies and how much behavior is shared through the DOM. The audit produces a scope and timeline for the actual codebase before migration work begins.
We run an old PHP backend. Does that need to change too?
No. The new components can mount in the pages your PHP backend already renders and keep using the existing AJAX endpoints. I only include backend changes when a frontend feature genuinely requires them.
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