#105 Fix resize with n/s handles on locked aspect ratio (#106)

* #105 Fix resize with n/s handles on locked aspect ratio

* #105 Cleanup code after review

Author: simzar

lib/Resizable.js

@@ -136,9 +136,17 @@ export default class Resizable extends React.Component<Props, State> {
     const [min, max] = [this.props.minConstraints, this.props.maxConstraints];
 
     if (this.props.lockAspectRatio) {
-      const ratio = this.state.width / this.state.height;
-      height = width / ratio;
-      width = height * ratio;
+      if (height === this.state.height) {
+        const ratio = this.state.width / this.state.height;
+        height = width / ratio;
+        width = height * ratio;
+      } else {
+        // Take into account vertical resize with N/S handles on locked aspect
+        // ratio. Calculate the change height-first, instead of width-first
+        const ratio = this.state.height / this.state.width;
+        width = height / ratio;
+        height = width * ratio;
+      }
     }
 
     if (!min && !max) return [width, height];