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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 | 2x 2x 2x 2x 50x 50x 2x 46x 46x 46x 46x 34x 34x 34x 8x 8x 6x 2x 8x 2x 6x 8x 8x 26x 26x 18x 18x | /**
* Copyright 2019 Adobe. All rights reserved.
* This file is licensed to you 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 http://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 REPRESENTATIONS
* OF ANY KIND, either express or implied. See the License for the specific language
* governing permissions and limitations under the License.
*/
import {commons} from '../../../coral-utils';
import {BaseComponent} from '../../../coral-base-component';
import {Decorator} from '../../../coral-decorator';
const CLASSNAME = '_coral-SideNav';
/**
@class Coral.SideNav.Level
@classdesc A SideNav Level component
@htmltag coral-sidenav-level
@extends {HTMLElement}
@extends {BaseComponent}
*/
const SideNavLevel = Decorator(class extends BaseComponent(HTMLElement) {
/** @ignore */
static get observedAttributes() {
return super.observedAttributes.concat(['_expanded']);
}
/** @ignore */
attributeChangedCallback(name, oldValue, value) {
if (name === '_expanded') {
const isExpanded = value === 'on';
if (oldValue !== value) {
this.classList.toggle('is-expanded', isExpanded);
// Do animation in next frame to avoid a forced reflow
window.requestAnimationFrame(() => {
// Don't animate on initialization
if (this._animate) {
// Remove height as we want the level to naturally grow if content is added later
commons.transitionEnd(this, () => {
if (isExpanded) {
this.style.height = '';
} else {
E this.hidden = true;
}
});
// Force height to enable transition
if (!isExpanded) {
this.style.height = `${this.scrollHeight}px`;
} else {
this.hidden = false;
}
// We read the offset height to force a reflow, this is needed to start the transition between absolute values
// https://blog.alexmaccaw.com/css-transitions under Redrawing
// eslint-disable-next-line no-unused-vars
const offsetHeight = this.offsetHeight;
this.style.height = isExpanded ? `${this.scrollHeight}px` : 0;
} else {
// Make sure it's animated next time
this._animate = true;
// Hide it on initialization if closed
if (!isExpanded) {
this.style.height = 0;
this.hidden = true;
}
}
});
}
} else {
super.attributeChangedCallback(name, oldValue, value);
}
}
/** @ignore */
render() {
super.render();
this.classList.add(CLASSNAME);
// a11y
this.setAttribute('role', 'region');
}
});
export default SideNavLevel;
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