feat:refact SliderDemo

js-framework/src/ui/declarative.ts

@@ -148,7 +148,7 @@ export class LayoutConfigImpl implements LayoutConfig, Modeling {
             widthSpec: this.widthSpec,
             heightSpec: this.heightSpec,
             margin: this.margin,
-            alignment: this.alignment,
+            alignment: this.alignment ? this.alignment.toModel() : undefined,
             weight: this.weight,
         }
     }

js-framework/src/ui/slider.ts

@@ -5,7 +5,7 @@ export function slideItem(item: View) {
     return (new SlideItem).also((it) => {
         it.layoutConfig = {
             widthSpec: LayoutSpec.AT_MOST,
-            heightSpec: LayoutSpec.WRAP_CONTENT,
+            heightSpec: LayoutSpec.AT_MOST,
         }
         it.addChild(item)
     })