Fix warnings from Rollup replace plugin (#304)

Author: veritem

package_template.json

@@ -32,7 +32,7 @@
         "@rollup/plugin-babel": "^5.0.0",
         "@rollup/plugin-commonjs": "^14.0.0",
         "@rollup/plugin-node-resolve": "^8.0.0",
-        "@rollup/plugin-replace": "^2.2.0",
+        "@rollup/plugin-replace": "^2.4.0",
         "@rollup/plugin-url": "^5.0.0",
         "rollup": "^2.3.4",
         "rollup-plugin-svelte": "^7.0.0",

rollup.config.js

@@ -24,8 +24,11 @@ export default {
 		output: config.client.output(),
 		plugins: [
 			replace({
-				'process.browser': true,
-				'process.env.NODE_ENV': JSON.stringify(mode)
+				preventAssignment: true,
+				values:{
+					'process.browser': true,
+					'process.env.NODE_ENV': JSON.stringify(mode)
+				},
 			}),
 			svelte({
 				compilerOptions: {
@@ -74,8 +77,11 @@ export default {
 		output: config.server.output(),
 		plugins: [
 			replace({
-				'process.browser': false,
-				'process.env.NODE_ENV': JSON.stringify(mode)
+				preventAssignment: true,
+				values:{
+					'process.browser': true,
+					'process.env.NODE_ENV': JSON.stringify(mode)
+				},
 			}),
 			svelte({
 				compilerOptions: {
@@ -96,7 +102,6 @@ export default {
 			commonjs()
 		],
 		external: Object.keys(pkg.dependencies).concat(require('module').builtinModules),
-
 		preserveEntrySignatures: 'strict',
 		onwarn,
 	},
@@ -107,13 +112,15 @@ export default {
 		plugins: [
 			resolve(),
 			replace({
-				'process.browser': true,
-				'process.env.NODE_ENV': JSON.stringify(mode)
+				preventAssignment: true,
+				values:{
+					'process.browser': true,
+					'process.env.NODE_ENV': JSON.stringify(mode)
+				},
 			}),
 			commonjs(),
 			!dev && terser()
 		],
-
 		preserveEntrySignatures: false,
 		onwarn,
 	}