WIP

Author: mydea

dev-packages/rollup-utils/npmHelpers.mjs

@@ -33,13 +33,12 @@ export function makeBaseNPMConfig(options = {}) {
     esModuleInterop = false,
     hasBundles = false,
     packageSpecificConfig = {},
-    addPolyfills = true,
     sucrase = {},
     bundledBuiltins = [],
   } = options;
 
   const nodeResolvePlugin = makeNodeResolvePlugin();
-  const sucrasePlugin = makeSucrasePlugin({}, { disableESTransforms: !addPolyfills, ...sucrase });
+  const sucrasePlugin = makeSucrasePlugin({}, sucrase);
   const debugBuildStatementReplacePlugin = makeDebugBuildStatementReplacePlugin();
   const importMetaUrlReplacePlugin = makeImportMetaUrlReplacePlugin();
   const cleanupPlugin = makeCleanupPlugin();
@@ -64,13 +63,9 @@ export function makeBaseNPMConfig(options = {}) {
       // output individual files rather than one big bundle
       preserveModules: true,
 
-      // Allow wrappers or helper functions generated by rollup to use any ES2015 features except symbols. (Symbols in
-      // general are fine, but the `[Symbol.toStringTag]: 'Module'` which Rollup adds alongside `__esModule:
-      // true` in CJS modules makes it so that Jest <= 29.2.2 crashes when trying to mock generated `@sentry/xxx`
-      // packages. See https://github.com/getsentry/sentry-javascript/pull/6043.)
+      // Allow wrappers or helper functions generated by rollup to use any ES2015 features
       generatedCode: {
         preset: 'es2015',
-        symbols: false,
       },
 
       // don't add `"use strict"` to the top of cjs files

dev-packages/rollup-utils/plugins/npmPlugins.mjs

@@ -29,6 +29,10 @@ export function makeSucrasePlugin(options = {}, sucraseOptions = {}) {
     },
     {
       transforms: ['typescript', 'jsx'],
+      // We use a custom forked version of sucrase,
+      // where optional chaining & nullish coalescing are never polyfilled (even if this is false)
+      // If this is disabled, then numeric separators & class fields are not polyfilled anymore, which we rely on
+      disableESTransforms: false,
       ...sucraseOptions,
     },
   );

package.json

@@ -31,6 +31,7 @@
     "lint:lerna": "lerna run lint",
     "lint:biome": "biome check .",
     "lint:prettier": "prettier \"**/*.md\" \"**/*.css\" --check",
+    "lint:es-compatibility": "es-check es2020 ./packages/*/build/{bundles,npm/cjs,cjs}/*.js && es-check es2020 ./packages/*/build/{npm/esm,esm}/*.js --module=true",
     "postpublish": "lerna run --stream --concurrency 1 postpublish",
     "test": "lerna run --ignore \"@sentry-internal/{browser-integration-tests,e2e-tests,integration-shims,node-integration-tests}\" test",
     "test:unit": "lerna run --ignore \"@sentry-internal/{browser-integration-tests,e2e-tests,integration-shims,node-integration-tests}\" test:unit",
@@ -115,6 +116,7 @@
     "@vitest/coverage-v8": "^1.6.0",
     "deepmerge": "^4.2.2",
     "downlevel-dts": "~0.11.0",
+    "es-check": "^7.2.1",
     "eslint": "7.32.0",
     "jest": "^27.5.1",
     "jest-environment-node": "^27.5.1",
@@ -144,7 +146,8 @@
   "resolutions": {
     "gauge/strip-ansi": "6.0.1",
     "wide-align/string-width": "4.2.3",
-    "cliui/wrap-ansi": "7.0.0"
+    "cliui/wrap-ansi": "7.0.0",
+    "**/sucrase": "getsentry/sucrase#es2020-polyfills"
   },
   "version": "0.0.0",
   "name": "sentry-javascript",

packages/node/rollup.anr-worker.config.mjs

@@ -7,7 +7,6 @@ export function createWorkerCodeBuilder(entry, outDir) {
     makeBaseBundleConfig({
       bundleType: 'node-worker',
       entrypoints: [entry],
-      sucrase: { disableESTransforms: true },
       licenseTitle: '@sentry/node',
       outputFileBase: () => 'worker-script.js',
       packageSpecificConfig: {