dom patchNode.ts

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  import { VirtualNode } from "../../interfaces";
import createNode from "./createNode";
 
export default function patchNode(newVNode: VirtualNode, oldVNode: VirtualNode, document: Document): Node {
 
    
    const oldElement = oldVNode.$node;
 
    if (newVNode.tag === oldVNode.tag) { // Check if the attributes and children changed
 
        return oldElement;
 
    }
    else { // Different tags, replace the element
 
        const newElement = createNode(newVNode);
 
        oldElement.parentNode.replaceChild(newElement, oldElement);
 
        return newElement;
    }
 
}