More explicit

Author: Timer

Diff for: packages/react-scripts/scripts/build.js

@@ -60,11 +60,11 @@ if (!checkRequiredFiles([paths.appHtml, paths.appIndexJs])) {
 // browserslist defaults.
 const { checkBrowsers } = require('react-dev-utils/browsersHelper');
 checkBrowsers(paths.appPath)
-  .then(() =>
+  .then(() => {
     // First, read the current file sizes in build directory.
     // This lets us display how much they changed later.
-    measureFileSizesBeforeBuild(paths.appBuild)
-  )
+    return measureFileSizesBeforeBuild(paths.appBuild);
+  })
   .then(previousFileSizes => {
     // Remove all content but keep the directory so that
     // if you're in it, you don't end up in Trash

Diff for: packages/react-scripts/scripts/start.js

@@ -62,11 +62,11 @@ const HOST = process.env.HOST || '0.0.0.0';
 // browserslist defaults.
 const { checkBrowsers } = require('react-dev-utils/browsersHelper');
 checkBrowsers(paths.appPath)
-  .then(() =>
+  .then(() => {
     // We attempt to use the default port but if it is busy, we offer the user to
     // run on a different port. `choosePort()` Promise resolves to the next free port.
-    choosePort(HOST, DEFAULT_PORT)
-  )
+    return choosePort(HOST, DEFAULT_PORT);
+  })
   .then(port => {
     if (port == null) {
       // We have not found a port.