From f18a56b3efafdb14989b45bfff0f94e1863b3899 Mon Sep 17 00:00:00 2001
From: Cassey Lottman <clottman@users.noreply.github.com>
Date: Tue, 15 Jun 2021 10:06:43 -0500
Subject: [PATCH] feat: Support multiple languages at once in builds (#2994)

* aria-supported doesn't throw if multiple languages used

* include info on targeting multiple languages in readme
---
 Gruntfile.js                  | 3 +++
 README.md                     | 2 +-
 build/tasks/aria-supported.js | 5 ++---
 3 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/Gruntfile.js b/Gruntfile.js
index d308e0fd4e..37f31aa97e 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -110,6 +110,9 @@ module.exports = function(grunt) {
       data: {
         entry: 'lib/commons/aria/index.js',
         destFile: 'doc/aria-supported.md',
+        options: {
+          langs: langs
+        },
         listType: 'unsupported' // Possible values for listType: 'supported', 'unsupported', 'all'
       }
     },
diff --git a/README.md b/README.md
index c3a6b6f9eb..da4134acb0 100644
--- a/README.md
+++ b/README.md
@@ -101,7 +101,7 @@ or equivalently:
 
 `npm run build -- --lang=nl`
 
-This will create a new build for axe, called `axe.<lang>.js` and `axe.<lang>.min.js`. If you want to build localized versions, simply pass in `--all-lang` instead.
+This will create a new build for axe, called `axe.<lang>.js` and `axe.<lang>.min.js`. If you want to build localized versions, simply pass in `--all-lang` instead. If you want to build multiple localized versions (but not all of them), you can pass in a comma-separated list of langages to the `--lang` flag, like `--lang=nl,ja`.
 
 To create a new translation for axe, start by running `grunt translate --lang=<langcode>`. This will create a json file fin the `./locales` directory, with the default English text in it for you to translate. We welcome any localization for axe-core. For details on how to contribute, see the Contributing section below. For details on the message syntax, see [Check Message Template](/docs/check-message-template.md).
 
diff --git a/build/tasks/aria-supported.js b/build/tasks/aria-supported.js
index 04e2ae69fe..81de153d75 100644
--- a/build/tasks/aria-supported.js
+++ b/build/tasks/aria-supported.js
@@ -16,9 +16,8 @@ module.exports = function(grunt) {
        * as `axe` does not exist until grunt task `build:uglify` is complete,
        * hence cannot be required at the top of the file.
        */
-      const langOption = grunt.option('lang');
-      const fileNameSuffix =
-        langOption && langOption.length > 0 ? `.${langOption}` : '';
+      const { langs } = this.options();
+      const fileNameSuffix = langs && langs.length > 0 ? `${langs[0]}` : '';
       const axe = require(`../../axe${fileNameSuffix}`);
       const listType = this.data.listType.toLowerCase();
       const headings = {