Learn promise

imteekay · imteekay · commit 88cd2c89e2ab · 2019-03-31T16:39:33.000-03:00
diff --git a/javascript/javascript/promise.html b/javascript/javascript/promise.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <title>Promisify setTimeout</title>
+  </head>
+  <body>
+    <h1>Did the promise finish?</h1>
+    <div class="completion">Not yet</div>
+    <script>
+      function wait(ms) {
+        return new Promise(function(resolve, reject) {
+          window.setTimeout(function() {
+            resolve();
+          }, ms);
+        });
+      }
+
+      var milliseconds = 2000;
+      wait(milliseconds).then(finish);
+
+      function finish() {
+        var completion = document.querySelector(".completion");
+        completion.innerHTML = "Complete after " + milliseconds + "ms.";
+      }
+    </script>
+  </body>
+</html>
