fix examples

docs/examples/dom/index.js

@@ -0,0 +1,15 @@
+Object.assign(globalThis.document.body, {innerHTML: `
+  Index:
+  <input type='number' id='i'>
+  <br>
+  Fibonacci number:
+  <span id='result'></span>
+`})
+
+const fib = (i) => {
+  return i*10
+}
+
+globalThis.document.getElementById('i').addEventListener('change', e => {
+  Object.assign(globalThis.result, {innerText: fib(e.target.value)})
+})