feat: base html sheet

src/elements/column.ts

@@ -29,6 +29,23 @@ export class Column extends AbstractElement {
     return doc;
   }
 
+  public renderHtml(
+    doc: Document,
+    parent: HTMLElement,
+    cssRules: string[],
+    sheet: HTMLStyleElement
+  ): Document {
+    const div = doc.createElement('div');
+    div.classList.add(`column`);
+    const elements = this.elements ?? [];
+    for (let i = 0; i < elements.length; i++) {
+      const element = elements[i];
+      element.renderHtml(doc, div, cssRules, sheet);
+    }
+    parent.append(div);
+    return doc;
+  }
+
   public getHeight(doc): number {
     return this.elements.length > 0
       ? this.elements