Function copyDomProperties

packages/core/src/debug/debug_node.ts:392–413

(element: Element | null, properties: {[name: string]: string})

}

function copyDomProperties(element: Element | null, properties: {[name: string]: string}): void {
  if (element) {
    // Skip own properties (as those are patched)
    let obj = Object.getPrototypeOf(element);
    const NodePrototype: any = Node.prototype;
    while (obj !== null && obj !== NodePrototype) {
      const descriptors = Object.getOwnPropertyDescriptors(obj);
      for (let key in descriptors) {
        if (!key.startsWith('__') && !key.startsWith('on')) {
          // don't include properties starting with `__` and `on`.
          // `__` are patched values which should not be included.
          // `on` are listeners which also should not be included.
          const value = (element as any)[key];
          if (isPrimitiveValue(value)) {
            properties[key] = value;
          }
        }
      }
      obj = Object.getPrototypeOf(obj);
    }
  }
}

function isPrimitiveValue(value: any): boolean {
  return (