refactor: move echarts and tinycolor2 to peerDependencies and update Vite configuration

Author: Marko Petzold

package.json

@@ -23,11 +23,13 @@
         "release": "npm run build && npm run types && npm version patch --tag-version-prefix='' && git push && git push --tag && npm run build"
     },
     "dependencies": {
-        "echarts": "6.0.0",
         "lit": "^3.3.2",
-        "tinycolor2": "^1.6.0",
         "tslib": "^2.8.1"
     },
+    "peerDependencies": {
+        "echarts": "^6.0.0",
+        "tinycolor2": "^1.6.0"
+    },
     "devDependencies": {
         "@custom-elements-manifest/analyzer": "^0.10.4",
         "@rollup/plugin-replace": "^6.0.2",

vite.config.ts

@@ -7,13 +7,14 @@ const pkg = JSON.parse(readFileSync('./package.json', 'utf-8'))
 export default defineConfig({
     server: { open: '/demo/', port: 8000 },
     resolve: { alias: { tslib: 'tslib/tslib.es6.js' } },
-    optimizeDeps: { include: ['echarts', 'zrender', 'tslib', 'tinycolor2'] },
+    optimizeDeps: { exclude: ['echarts', 'tinycolor2'] },
     define: { 'process.env.NODE_ENV': JSON.stringify('production') },
     plugins: [replace({ versionplaceholder: pkg.version, preventAssignment: true })],
     build: {
         lib: { entry: 'src/widget-linechart.ts', formats: ['es'], fileName: 'widget-linechart' },
         sourcemap: true,
         rollupOptions: {
+            external: [/^echarts/, 'tinycolor2'],
             output: { banner: '/* @license Copyright (c) 2025 Record Evolution GmbH. All rights reserved.*/' }
         }
     }