diff --git a/index.html b/index.html
index 419d47c..60b672d 100644
--- a/index.html
+++ b/index.html
@@ -326,6 +326,7 @@
                 new Date().getTimezoneOffset() * 60000;
 
             function random(begin = 10, end = 90, multiple = 10) {
+                return undefined
                 let k;
                 do {
                     k = Math.floor(Math.random() * 100);
diff --git a/src/bar.js b/src/bar.js
index 3701211..c915be0 100644
--- a/src/bar.js
+++ b/src/bar.js
@@ -56,7 +56,7 @@ export default class Bar {
         this.compute_duration();
         this.corner_radius = this.gantt.options.bar_corner_radius;
         this.width = this.gantt.config.column_width * this.duration;
-        if (this.task.progress < 0) this.task.progress = 0;
+        if (!this.task.progress || this.task.progress < 0) this.task.progress = 0;
         if (this.task.progress > 100) this.task.progress = 100;
     }
 
diff --git a/src/index.js b/src/index.js
index 6602861..054d3e2 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1335,7 +1335,6 @@ export default class Gantt {
 
     bind_bar_progress() {
         let x_on_start = 0;
-        let y_on_start = 0;
         let is_resizing = null;
         let bar = null;
         let $bar_progress = null;