build(core): Compile SDK to ES2018 to drop inlined TS helpers

CHANGELOG.md

@@ -8,6 +8,10 @@
 
 ## Unreleased
 
+### Changes
+
+- Compile the SDK to ES2018 to stop inlining TypeScript helpers (`__awaiter`, `__rest`) in every file, reducing bundle size ([#6957](https://github.com/getsentry/sentry-react-native/pull/6957))
+
 ### Fixes
 
 - Apply `screenshot` masking options to Android error and feedback screenshots ([#6930](https://github.com/getsentry/sentry-react-native/pull/6930))

packages/core/tsconfig.build.json

@@ -39,7 +39,7 @@
     // react-native's global types are pulled in via the `paths` mapping above; classic `node`
     // resolution can no longer discover them through the removed root `types` field.
     "types": [],
-    "target": "es6",
+    "target": "es2018",
     "module": "es6",
     "skipLibCheck": true,
     "strictBindCallApply": true,

packages/core/tsconfig.build.tools.json

@@ -19,7 +19,7 @@
     "rootDir": "src",
     "lib": ["es7"],
     "types": ["node"],
-    "target": "es6",
+    "target": "es2018",
     "module": "CommonJS",
     "skipLibCheck": true,
     "importHelpers": false

packages/core/tsconfig.json

@@ -17,6 +17,9 @@
   "compilerOptions": {
     "rootDir": ".",
     "jsx": "react",
-    "types": ["jest"]
+    "types": ["jest"],
+    // Jest compiles with this config. Keep async/await downleveled like Metro's Babel preset does in apps,
+    // so SDK async code runs on the global (polyfilled) Promise that `Sentry.init` installs.
+    "target": "es2016"
   }
 }

packages/core/tsconfig.lint.json

@@ -54,7 +54,7 @@
     "lib": ["es7"],
     "jsx": "react",
     "types": ["jest"],
-    "target": "es6",
+    "target": "es2018",
     "module": "es6",
     "skipLibCheck": true,
     "strictBindCallApply": true,