Merge pull request #7257 from plotly/only-keep-js-in-dist

Do not keep empty CSS files generated by `esbuild` on the repository

Author: archmoj

.gitignore

@@ -5,6 +5,7 @@ build/*
 !build/README.md
 
 dist/*.LICENSE.txt
+dist/*.css
 
 npm-debug.log*
 *.sublime*

tasks/util/bundle_wrapper.mjs

@@ -1,3 +1,4 @@
+import fs from 'fs';
 import fsExtra from 'fs-extra';
 import prependFile from 'prepend-file';
 
@@ -43,7 +44,17 @@ export default async function _bundle(pathToIndex, pathToBundle, opts, cb) {
 
     await build(config);
 
-    addWrapper(pathToBundle)
+    addWrapper(pathToBundle);
+
+    if(pathToBundle.endsWith('.js')) {
+        var len = pathToBundle.length;
+        var cssOutput = pathToBundle.slice(0, len - 3) + '.css';
+
+        // remove unwanted css file
+        if (fs.existsSync(cssOutput)) {
+            fs.unlinkSync(cssOutput);
+        }
+    }
 
     if(cb) cb();
 }