fix(playground): backward compatibility for --parser babylon (#5690)

website/playground/codeSamples.js

@@ -1,7 +1,7 @@
 export default function(parser) {
   switch (parser) {
     case "babel":
-    case "babylon": // backward compatibility for v1.15 playground
+    case "babylon": // backward compatibility
       return [
         'function HelloWorld({greeting = "hello", greeted = \'"World"\', silent = false, onMouseOver,}) {',
         "",

website/playground/markdown.js

@@ -36,6 +36,7 @@ function formatMarkdown(
 function getMarkdownSyntax(options) {
   switch (options.parser) {
     case "babel":
+    case "babylon": // backward compatibility
     case "flow":
       return "jsx";
     case "typescript":

website/playground/util.js

@@ -11,7 +11,9 @@ export function getDefaults(availableOptions, optionNames) {
   for (const option of availableOptions) {
     if (optionNames.includes(option.name)) {
       defaults[option.name] =
-        option.name === "parser" ? "babel" : option.default;
+        option.name === "parser"
+          ? "babylon" // TODO(1.16): replace with `babel`
+          : option.default;
     }
   }
   return defaults;

website/static/worker.js

@@ -17,7 +17,7 @@ var parsers = {
     importScriptOnce("lib/parser-babylon.js");
     return prettierPlugins.babylon.parsers.babel;
   },
-  // backward compatibility for v1.15 playground
+  // backward compatibility
   get babylon() {
     importScriptOnce("lib/parser-babylon.js");
     return prettierPlugins.babylon.parsers.babylon;