// Copyright 2018 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* @module elements-sk/tabs-panel-sk
* @description <h2><code>tabs-panel-sk</code></h2>
*
* <p>
* See the description of [tabs-sk]{@link module:elements-sk/tabs-sk}.
* </p>
*
* @attr selected - The index of the tab panel to display.
*
*/
import { define } from '../define';
import { upgradeProperty } from '../upgradeProperty';
export class TabsPanelSk extends HTMLElement {
static get observedAttributes() {
return ['selected'];
}
connectedCallback() {
upgradeProperty(this, 'selected');
}
/** Mirrors the 'selected' attribute. */
get selected() { return +(this.getAttribute('selected') || ''); }
set selected(val) {
this.setAttribute('selected', String(val));
this._select(val);
}
attributeChangedCallback(name, oldValue, newValue) {
this._select(+newValue);
}
_select(index) {
for (let i = 0; i < this.children.length; i++) {
this.children[i].classList.toggle('selected', i === index);
}
}
}
;
define('tabs-panel-sk', TabsPanelSk);
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