Revert unecessary change in Rakefile, simplify the default example in…

… docs/index.html and initialize select disabled til the page loads

Rakefile

@@ -19,7 +19,7 @@ file "head-wasm32-unknown-wasi-full-js" do
   version = JSON.parse(File.read("package.json"))["dependencies"]["ruby-head-wasm-wasi"][1..]
   filename = "ruby-head-wasm32-unknown-wasi-full-js.tar.gz"
 
-  `curl -LO https://github.com/ruby/ruby.wasm/releases/download/ruby-head-wasm-wasi-#{version}/ruby-head-wasm32-unknown-wasi-full-js.tar.gz`
+  `curl -LO https://github.com/ruby/ruby.wasm/releases/download/ruby-head-wasm-wasi-#{version}/#{filename}`
   `tar xfz #{filename}`
   rm filename
 end

docs/index.html

@@ -16,20 +16,14 @@ <h1>Syntax Tree</h1>
         <span><button type="button" id="format" disabled>Format</button></span>
 
         <div class="toggles">
-          <select>
+          <select disabled>
             <option value="prettyPrint">AST</option>
             <option value="disasm">ISEQ</option>
             <option value="mermaid">GRAPH</option>
           </select>
         </div>
       </nav>
-      <textarea id="editor">
-SyntaxTree::Binary[
-  left: SyntaxTree::Int[value: "1"],
-  operator: :+,
-  right: SyntaxTree::Int[value: "1"]
-]
-      </textarea>
+      <textarea id="editor">1 + 2 * 3</textarea>
       <textarea id="output" disabled readonly>Loading...</textarea>
       <div id="graph-container" class="graph-container"></div>
     </main>

src/index.ts

@@ -98,4 +98,6 @@ Promise.all([
   format.addEventListener("click", () => {
     editor.setValue(ruby.format(editor.getValue()));
   });
+
+  toggles.querySelector("select").removeAttribute('disabled');
 });