It is not possible for width to have a value in mounted().

It is only onWindowResize that sets width. And onWindowResize() gets
called by mounted(), if self.$refs.item changes size (setup during
mounted()) or in the watch for 'responsive'.

In fact, there was a potential bug here. (I'm not sure how to trigger
it, but bear with me):

If a caller was to change this.responsive before mounted() was called,
onWindowResize() would be called an that would set width to a non-null
value. Because of that, these two would not be called during mount:

    self.initResponsiveFeatures();
    addWindowEventListener('resize', self.onWindowResize);

And they should.

So all in all mounted() should not check for self.width == null

Author: pmorch

src/components/GridLayout.vue

@@ -153,14 +153,13 @@
                 this.originalLayout = this.layout;
                 const self = this;
                 this.$nextTick(function() {
-                    if (self.width === null) {
-                        self.onWindowResize();
+                    self.onWindowResize();
 
-                        self.initResponsiveFeatures();
+                    self.initResponsiveFeatures();
+
+                    //self.width = self.$el.offsetWidth;
+                    addWindowEventListener('resize', self.onWindowResize);
 
-                        //self.width = self.$el.offsetWidth;
-                        addWindowEventListener('resize', self.onWindowResize);
-                    }
                     compact(self.layout, self.verticalCompact);
 
                     self.updateHeight();