fix: optimize umd bundle size

package.json

@@ -43,9 +43,9 @@
     "svelte": "^3.49.0",
     "svelte-preprocess": "^4.10.7",
     "svelte2tsx": "^0.5.11",
-    "tsdv": "^0.4.0",
+    "tsdv": "^0.5.0",
     "typescript": "^4.7.4",
-    "vite": "^2.9.12"
+    "vite": "^2.9.13"
   },
   "packageManager": "pnpm@7.1.9",
   "bundlewatch": {

packages/bytemd/tsdv.config.mjs → packages/bytemd/tsdv.config.ts

@@ -1,19 +1,22 @@
-// @ts-check
 import { defineConfig } from 'tsdv'
 import { svelte } from '@sveltejs/vite-plugin-svelte'
-import { alias, sveltePreprocessor } from '../../scripts/build.mjs'
+import { getAlias, sveltePreprocessor } from '../../scripts/build.mjs'
 
 // nullish coalescing in es2020
 export default defineConfig({
   target: 'es2019',
   tsc: false,
-  vite: {
-    resolve: { alias },
-    plugins: [
-      svelte({
-        preprocess: [sveltePreprocessor],
-      }),
-    ],
+  vite({ format }) {
+    return {
+      resolve: {
+        alias: getAlias(format),
+      },
+      plugins: [
+        svelte({
+          preprocess: [sveltePreprocessor],
+        }),
+      ],
+    }
   },
   test: {
     globals: true,

packages/plugin-gfm/tsdv.config.ts

@@ -1,10 +1,14 @@
 import { defineConfig } from 'tsdv'
-import { alias } from '../../scripts/build.mjs'
+import { getAlias } from '../../scripts/build.mjs'
 
 export default defineConfig({
   target: 'es2019',
   tsc: false,
-  vite: {
-    resolve: { alias },
+  vite({ format }) {
+    return {
+      resolve: {
+        alias: getAlias(format),
+      },
+    }
   },
 })

scripts/build.mjs

@@ -13,10 +13,13 @@ export const sveltePreprocessor = sveltePreprocess({
   ],
 })
 
-const pkgName = 'decode-named-character-reference'
+// do not resolve `browser` field to make CJS bundle work at SSR
+// https://github.com/vitejs/vite/issues/4405
+export function getAlias(format) {
+  const pkgName = 'decode-named-character-reference'
 
-export const alias = {
-  // do not resolve `browser` field to make it work at SSR
-  // https://github.com/vitejs/vite/issues/4405
-  [pkgName]: resolve.sync(pkgName),
+  if (format === 'cjs')
+    return {
+      [pkgName]: resolve.sync(pkgName),
+    }
 }