Add svelte kit routing provider (#632)

* feat: ✨ create new svelte-kit routing provider

* docs: 📝 add documentation

* add unit tests

* test: 🧪 add svelte-kit end to end tests

* refactor: ♻️ refactor resolveRoute to return the current route

* test: ✅ use SPA mode for dynamic routes

* refactor: ♻️ use defaultRouteResolver instead of / as fallback

* pass initialRoute to plugin

* skip tests on browsers that don't support ES Modules

* test: add svelte-kit package to change aware build script

* update README

Author: gingerbenw

.buildkite/scripts/packages.json

@@ -12,7 +12,8 @@
             "packages/angular",
             "packages/react-router",
             "packages/vue",
-            "packages/plugin-react-performance"
+            "packages/plugin-react-performance",
+            "packages/svelte-kit"
         ]
     },
     {

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Added
 
 - (core) Added `onSpanStart` callbacks config option to allow spans to be inspected and modified on creation. [#631](https://github.com/bugsnag/bugsnag-js-performance/pull/631)
+- (svelte-kit-performance) Added new routing provider for instrumenting route change spans with [SvelteKit](https://svelte.dev/docs/kit/introduction) [#632](https://github.com/bugsnag/bugsnag-js-performance/pull/632)
 
 ## [v2.13.0] (2025-05-15)
 

jest.config.js

@@ -69,6 +69,11 @@ module.exports = {
       testMatch: ['<rootDir>/packages/react-router/**/*.test.ts'],
       ...defaultModuleConfig
     },
+    {
+      displayName: 'svelte-kit',
+      testMatch: ['<rootDir>/packages/svelte-kit/**/*.test.ts'],
+      ...defaultModuleConfig
+    },
     {
       displayName: 'plugin-react-performance',
       testEnvironment: 'jsdom',