feat: Add es6 bundle

Author: HazAT

packages/browser/package.json

@@ -54,8 +54,8 @@
     "webpack": "^4.29.5"
   },
   "scripts": {
-    "build": "run-s build:esm build:es5",
-    "build:es5": "rollup --config",
+    "build": "run-s build:esm build:bundle",
+    "build:bundle": "rollup --config",
     "build:esm": "tsc -p tsconfig.esm.json",
     "build:watch": "rollup --config --watch",
     "clean": "rimraf dist coverage .rpt2_cache build esm",
@@ -72,7 +72,9 @@
     "test:integration:watch": "karma start test/karma/karma.integration.config.js --auto-watch --no-single-run",
     "test:saucelabs": "karma start test/karma/karma.saucelabs.config.js",
     "test:manual": "node test/manual/npm-build.js && rm test/manual/tmp.js",
-    "size:check": "cat build/bundle.min.js | gzip -9 | wc -c | awk '{$1=$1/1024; print $1,\"kB\";}'",
+    "size:check": "run-p size:check:es5 size:check:es6",
+    "size:check:es5": "cat build/bundle.min.js | gzip -9 | wc -c | awk '{$1=$1/1024; print \"ES5: \",$1,\"kB\";}'",
+    "size:check:es6": "cat build/bundle.es6.min.js | gzip -9 | wc -c | awk '{$1=$1/1024; print \"ES6: \",$1,\"kB\";}'",
     "version": "node ../../scripts/versionbump.js src/version.ts"
   },
   "sideEffects": false

packages/browser/rollup.config.js

@@ -77,19 +77,83 @@ export default [
     external: ['tslib'],
     plugins,
   },
-  Object.assign({}, bundleConfig, {
-    output: Object.assign({}, bundleConfig.output, {
+  {
+    ...bundleConfig,
+    output: {
+      ...bundleConfig.output,
       file: 'build/bundle.js',
-    }),
-  }),
-  Object.assign({}, bundleConfig, {
-    output: Object.assign({}, bundleConfig.output, {
+    },
+  },
+  {
+    ...bundleConfig,
+    output: {
+      ...bundleConfig.output,
       file: 'build/bundle.min.js',
-    }),
+    },
     // Uglify has to be at the end of compilation, BUT before the license banner
     plugins: bundleConfig.plugins
       .slice(0, -1)
       .concat(terserInstance)
       .concat(bundleConfig.plugins.slice(-1)),
-  }),
+  },
+  {
+    ...bundleConfig,
+    output: {
+      ...bundleConfig.output,
+      file: 'build/bundle.es6.js',
+    },
+    plugins: [
+      typescript({
+        tsconfig: 'tsconfig.build.json',
+        tsconfigOverride: {
+          compilerOptions: {
+            declaration: false,
+            module: 'ES2015',
+            paths: {
+              '@sentry/utils/*': ['../utils/src/*'],
+              '@sentry/core': ['../core/src'],
+              '@sentry/hub': ['../hub/src'],
+              '@sentry/types': ['../types/src'],
+              '@sentry/minimal': ['../minimal/src'],
+            },
+            target: 'es6',
+          },
+        },
+        include: ['*.ts+(|x)', '**/*.ts+(|x)', '../**/*.ts+(|x)'],
+      }),
+      ...plugins.slice(1),
+    ],
+  },
+  {
+    ...bundleConfig,
+    output: {
+      ...bundleConfig.output,
+      file: 'build/bundle.es6.min.js',
+    },
+    plugins: [
+      typescript({
+        tsconfig: 'tsconfig.build.json',
+        tsconfigOverride: {
+          compilerOptions: {
+            declaration: false,
+            module: 'ES2015',
+            paths: {
+              '@sentry/utils/*': ['../utils/src/*'],
+              '@sentry/core': ['../core/src'],
+              '@sentry/hub': ['../hub/src'],
+              '@sentry/types': ['../types/src'],
+              '@sentry/minimal': ['../minimal/src'],
+            },
+            target: 'es6',
+          },
+        },
+        include: ['*.ts+(|x)', '**/*.ts+(|x)', '../**/*.ts+(|x)'],
+      }),
+      ...plugins
+        .slice(1)
+        .slice(0, -1)
+        .concat(terserInstance)
+        .concat(bundleConfig.plugins.slice(-1)),
+    ],
+  },
 ];