1 files changed, 3 insertions, 3 deletions
diff --git a/app/client/common/slider.component.js b/app/client/common/slider.component.js
index fe27c84..174877d 100644
--- a/app/client/common/slider.component.js
+++ b/app/client/common/slider.component.js
@@ -16,7 +16,7 @@ class Slider extends Component {
     this.handleRange = this.handleRange.bind(this)
   }
   componentWillReceiveProps(nextProps) {
-    const next_value = nextProps.opt[nextProps.name]
+    const next_value = nextProps.value || nextProps.opt[nextProps.name]
     if (next_value !== this.state.value) {
       this.setState({ value: next_value });
     }
@@ -34,7 +34,7 @@ class Slider extends Component {
     if (old_value !== new_value) {
       this.setState({ value: new_value })
       this.props.actions.set_param(this.props.name, new_value)
-      this.props.onChange(new_value)
+      this.props.onChange && this.props.onChange(new_value)
     }
     clearTimeout(this.timeout)
   }
@@ -50,7 +50,7 @@ class Slider extends Component {
     this.setState({ value: new_value })
     this.timeout = setTimeout(() => {
       this.props.actions.set_param(this.props.name, new_value)
-      this.props.onChange(new_value)
+      this.props.onChange && this.props.onChange(new_value)
     }, SLIDER_THROTTLE_TIME)
   }
   render(){