promises

archive/promise/thenable.js

@@ -0,0 +1,23 @@
+function loadScript(src) {  
+  return new Promise(function(resolve, reject) {
+    let script = document.createElement('script');
+    script.src = src;
+
+    script.onload = () => resolve(script);
+    script.onerror = () => reject(new Error("Script load error: " + src));
+
+    document.head.append(script);
+  });
+}
+loadScript("/article/promise-chaining/one.js")
+  .then(script => {
+    return {
+      then(resolve, reject) {
+        setTimeout(() => resolve(script), 1000);
+      }
+    };
+  })
+  .then(function(script) {
+    alert(one);
+  });
+