Add an example script for waitForEvent

examples/waitForEvent.js

@@ -0,0 +1,35 @@
+import { browser } from 'k6/experimental/browser';
+
+export const options = {
+  scenarios: {
+    browser: {
+      executor: 'shared-iterations',
+      options: {
+        browser: {
+            type: 'chromium',
+        },
+      },
+    },
+  },
+}
+
+export default async function() {
+  const context = browser.newContext()
+
+  var counter = 0
+  const promise = context.waitForEvent("page", { predicate: page => {
+    if (++counter == 2) {
+      return true
+    }
+    return false
+  } })
+
+  const page = context.newPage()
+  const page2 = context.newPage()
+
+  await promise
+  console.log('promise evaluated')
+
+  page.close()
+  page2.close()
+};