diff --git a/wasm/demo/src/main.js b/wasm/demo/src/main.js
index 2f6de563d..b35c9aaa2 100644
--- a/wasm/demo/src/main.js
+++ b/wasm/demo/src/main.js
@@ -36,7 +36,7 @@ function runCodeFromTextarea() {
     const code = editor.getValue();
     try {
         const result = rp.pyEval(code, {
-            stdout: '#console'
+            stdout: consoleElement
         });
         if (result !== null) {
             consoleElement.value += `\n${result}\n`;
@@ -74,57 +74,58 @@ snippets.addEventListener('change', updateSnippet);
 // option selected for the `select`, but the textarea won't be updated)
 updateSnippet();
 
-const prompt = ">>>>> ";
+const prompt = '>>>>> ';
 
 const term = new Terminal();
 term.open(document.getElementById('terminal'));
 term.write(prompt);
 
 function removeNonAscii(str) {
-    if ((str===null) || (str===''))
-        return false;
-    else
-        str = str.toString();
+    if (str === null || str === '') return false;
+    else str = str.toString();
 
     return str.replace(/[^\x20-\x7E]/g, '');
 }
 
 function printToConsole(data) {
-    term.write(removeNonAscii(data) + "\r\n");
+    term.write(removeNonAscii(data) + '\r\n');
 }
 
-const terminalVM = rp.vmStore.init("term_vm");
+const terminalVM = rp.vmStore.init('term_vm');
 terminalVM.setStdout(printToConsole);
 
-var input = "";
-term.on("data", (data) => {
-  const code = data.charCodeAt(0);
-  if (code == 13) { // CR
-    if (input[input.length - 1] == ':') {
-        input += data
-        term.write("\r\n.....");
-    } else {
-        term.write("\r\n");
-        try {
-            terminalVM.exec(input);
-        } catch (err) {
-            if (err instanceof WebAssembly.RuntimeError) {
-                err = window.__RUSTPYTHON_ERROR || err;
+var input = '';
+term.on('data', data => {
+    const code = data.charCodeAt(0);
+    if (code == 13) {
+        // CR
+        if (input[input.length - 1] == ':') {
+            input += data;
+            term.write('\r\n.....');
+        } else {
+            term.write('\r\n');
+            try {
+                terminalVM.exec(input);
+            } catch (err) {
+                if (err instanceof WebAssembly.RuntimeError) {
+                    err = window.__RUSTPYTHON_ERROR || err;
+                }
+                printToConsole(err);
             }
-            printToConsole(err);
+            term.write(prompt);
+            input = '';
         }
-        term.write(prompt);
-        input = "";
+    } else if (code == 127) {
+        if (input.length > 0) {
+            term.write('\b \b');
+            input = input.slice(0, -1);
+        }
+    } else if (code < 32 || code == 127) {
+        // Control
+        return;
+    } else {
+        // Visible
+        term.write(data);
+        input += data;
     }
-  } else if (code == 127) {
-    if (input.length > 0) {
-        term.write("\b \b");
-        input = input.slice(0, -1);
-    }
-  } else if (code < 32 || code == 127) { // Control
-    return;
-  } else { // Visible
-    term.write(data);
-    input += data;
-  }
 });