iamso · March 21, 2017 12:24 · Mar 21, 2017 · Mar 21, 2017 · Mar 21, 2017
diff --git a/promise-chain.js b/promise-chain.js
@@ -1,6 +1,6 @@
 
 // the array to loop through
-const arr = [0,1,3,4,5,6,7,8,9,10,11,12,13,14,15,16];
+const arr = [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16];
 
 // start with a resolved promise
 let p = Promise.resolve();

diff --git a/promise-chain.js b/promise-chain.js
@@ -10,8 +10,10 @@ for (let i of arr) {
 
   // create promise chain
   p = p.then(() => {
+
     // return the promise for chaining
     return functionWithPromise(i);
+
   });
 
 }
@@ -27,6 +29,7 @@ function functionWithPromise(text) {
 
     // simulate asyncronous activity
     setTimeout(() => {
+
       // end the function
       console.log(`end promise: ${text}`);
 

diff --git a/promise-chain.js b/promise-chain.js
@@ -0,0 +1,40 @@
+
+// the array to loop through
+const arr = [0,1,3,4,5,6,7,8,9,10,11,12,13,14,15,16];
+
+// start with a resolved promise
+let p = Promise.resolve();
+
+// loop through the array
+for (let i of arr) {
+
+  // create promise chain
+  p = p.then(() => {
+    // return the promise for chaining
+    return functionWithPromise(i);
+  });
+
+}
+
+// dummy function with promise
+function functionWithPromise(text) {
+
+  // return a promise
+  return new Promise((resolve, reject) => {
+
+    // start the function
+    console.log(`start promise: ${text}`);
+
+    // simulate asyncronous activity
+    setTimeout(() => {
+      // end the function
+      console.log(`end promise: ${text}`);
+
+      // resolve the promise
+      resolve(text);
+
+    }, 1000);
+
+  });
+
+}
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