Add target environment option

Author: kevlened

README.md

@@ -68,6 +68,8 @@ Options:
                                                 [string] [default: .]
   --format         Only build specified formats
                                        [string] [default: es,cjs,umd]
+  --target         Specify your target environment
+                                             [string] [default: node]
   --compress       Compress output using UglifyJS
                                             [boolean] [default: true]
   --strict         Enforce undefined global context and add "use

src/cli.js

@@ -13,6 +13,7 @@ prog
 	.option('--entry, -i', 'Entry module(s)')
 	.option('--output, -o', 'Directory to place build files into')
 	.option('--format, -f', 'Only build specified formats', 'es,cjs,umd')
+	.option('--target', 'Specify your target environment', 'node')
 	.option('--external', `Specify external dependencies, or 'all'`)
 	.option('--compress', 'Compress output using UglifyJS', true)
 	.option('--strict', 'Enforce undefined global context and add "use strict"')

src/index.js

@@ -206,7 +206,8 @@ function createConfig(options, entry, format) {
 				}),
 				useNodeResolve && nodeResolve({
 					module: true,
-					jsnext: true
+					jsnext: true,
+					browser: options.target === 'browser'
 				}),
 				es3(),
 				// We should upstream this to rollup