From 039a628c091d16a2775a7a706ebaa4d7fe0ef968 Mon Sep 17 00:00:00 2001
From: Yuji Yaginuma <yuuji.yaginuma@gmail.com>
Date: Fri, 3 Oct 2025 07:21:41 +0900
Subject: [PATCH] Fix warnings related with Opal 2

Currently, some codes output warnings like the following.

```
warning: Backtick operator usage interpreted as intent to embed JavaScript; this code will break in Opal 2.0; add a magic comment: `# backtick_javascript: true` -- ./try_ruby.rb:
```
https://github.com/ruby/TryRuby/actions/runs/17408494030/job/49419277575#step:4:8

In Opal 2, `backtick_javascript` defaults to false, because
`Kernel#backtick` is implemented.
Files using inline JavaScript must add the
`# backtick_javascript: true` magic comment.

Ref: https://github.com/opal/opal/pull/2746
---
 app/editor.rb                     | 2 ++
 app/ruby_engine/cruby_wasi.rb     | 1 +
 app/ruby_engine/opal_webworker.rb | 1 +
 app/try_ruby.rb                   | 1 +
 4 files changed, 5 insertions(+)

diff --git a/app/editor.rb b/app/editor.rb
index 2db5b51b..116bb2ae 100644
--- a/app/editor.rb
+++ b/app/editor.rb
@@ -1,3 +1,5 @@
+# backtick_javascript: true
+
 # Wrapper for CodeMirror objects
 class Editor
   def initialize(dom_id, options)
diff --git a/app/ruby_engine/cruby_wasi.rb b/app/ruby_engine/cruby_wasi.rb
index 99c7bb57..de4e96b6 100644
--- a/app/ruby_engine/cruby_wasi.rb
+++ b/app/ruby_engine/cruby_wasi.rb
@@ -1,4 +1,5 @@
 # await: *await*, loading
+# backtick_javascript: true
 
 require 'await'
 
diff --git a/app/ruby_engine/opal_webworker.rb b/app/ruby_engine/opal_webworker.rb
index dc4059c3..0e36439f 100644
--- a/app/ruby_engine/opal_webworker.rb
+++ b/app/ruby_engine/opal_webworker.rb
@@ -1,4 +1,5 @@
 # await: *await*, loading
+# backtick_javascript: true
 
 require 'base64'
 require 'json'
diff --git a/app/try_ruby.rb b/app/try_ruby.rb
index 0a9fcbe3..b1607710 100644
--- a/app/try_ruby.rb
+++ b/app/try_ruby.rb
@@ -1,4 +1,5 @@
 # await: true
+# backtick_javascript: true
 
 require 'dependencies'
 require 'editor'