1/*
2 * Copyright (C) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16export function element(tag: string): (el: unknown) => void {
17  return (el: unknown): void => {
18    if (!customElements.get(tag)) {
19      //@ts-ignore
20      customElements.define(tag, el);
21    }
22  };
23}
24
25export abstract class BaseElement extends HTMLElement {
26  args: unknown;
27
28  public constructor(args: unknown | undefined | null = null) {
29    super();
30    this.args = args;
31    this.attachShadow({ mode: 'open' }).innerHTML = this.initHtml();
32    this.initElements();
33  }
34
35  abstract initElements(): void;
36
37  abstract initHtml(): string;
38
39  public connectedCallback(): void {}
40
41  public disconnectedCallback(): void {}
42
43  public adoptedCallback(): void {}
44
45  attributeChangedCallback(name: string, oldValue: string, newValue: string): void {}
46}
47