Iterate the resizer

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/resizer/distributors/fixed.ts

@@ -39,10 +39,18 @@ export default class FixedDistributor<C extends IConfig, I extends ResizeItem<an
 
     private readonly beforeOffset: number;
 
-    constructor(protected item: I) {
+    constructor(public readonly item: I) {
         this.beforeOffset = item.offset();
     }
 
+    public get size() {
+        return this.item.getSize();
+    }
+
+    public set size(size: string) {
+        this.item.setRawSize(size);
+    }
+
     public resize(size: number) {
         this.item.setSize(size);
     }

src/resizer/distributors/percentage.ts

@@ -29,6 +29,7 @@ class PercentageSizer extends Sizer {
 
     public finish(item: HTMLElement) {
         const parent = item.offsetParent as HTMLElement;
+        if (!parent) return;
         if (this.vertical) {
             const p = ((item.offsetHeight / parent.offsetHeight) * 100).toFixed(2) + "%";
             item.style.minHeight = p;