Move site search to use an endpoint (#17359)

* Move site search to use an endpoint

* Update browser.js

* Update search.js

* Update lib/search/versions.js

Co-authored-by: James M. Greene <JamesMGreene@github.com>

* Fix URLs

Co-authored-by: James M. Greene <JamesMGreene@github.com>

javascripts/hyperscript.js

@@ -0,0 +1,44 @@
+const xmlns = 'http://www.w3.org/2000/svg'
+
+const plainObjectConstructor = {}.constructor
+
+function exists (value) {
+  return value !== null && typeof value !== 'undefined'
+}
+
+function isPlainObject (value) {
+  return value.constructor === plainObjectConstructor
+}
+
+function isString (value) {
+  return typeof value === 'string'
+}
+
+function renderChildren (el, children) {
+  for (const child of children) {
+    if (isPlainObject(child)) {
+      Object.entries(child)
+        .filter(([key, value]) => exists(value))
+        .forEach(([key, value]) => el.setAttribute(key, value))
+    } else if (Array.isArray(child)) {
+      renderChildren(el, child)
+    } else if (isString(child)) {
+      el.append(document.createTextNode(child))
+    } else {
+      el.append(child)
+    }
+  }
+}
+
+export default function h (tagName, ...children) {
+  const el = ['svg', 'path'].includes(tagName)
+    ? document.createElementNS(xmlns, tagName)
+    : document.createElement(tagName)
+  renderChildren(el, children)
+  return el
+}
+
+export const tags = Object.fromEntries(
+  ['div', 'form', 'a', 'input', 'button', 'ol', 'li', 'em']
+    .map(tagName => [tagName, (...args) => h(tagName, ...args)])
+)