59 lines
2 KiB
JavaScript
59 lines
2 KiB
JavaScript
class CustomProgressBar extends HTMLElement {
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constructor() {
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super();
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const shadowRoot = this.attachShadow({mode: 'open'});
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shadowRoot.innerHTML = `
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<style>
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:host {
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display: inline-block;
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width: 5rem;
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height: 1rem;
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}
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.progress {
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display: inline-block;
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position: relative;
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border: solid 1px #000;
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padding: 1px;
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width: 100%;
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height: 100%;
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}
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.progress > .bar {
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background: #9cf;
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height: 100%;
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}
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.progress > .label {
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position: absolute;
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top: 0;
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left: 0;
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width: 100%;
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text-align: center;
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font-size: 0.8rem;
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line-height: 1.1rem;
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}
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</style>
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<div class="progress" role="progressbar" aria-valuenow="0" aria-valuemin="0" aria-valuemax="100">
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<div class="bar" style="width: 0px;"></div>
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<div class="label">0%</div>
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</div>
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`;
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this._progressElement = shadowRoot.querySelector('.progress');
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this._label = shadowRoot.querySelector('.label');
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this._bar = shadowRoot.querySelector('.bar');
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}
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static get observedAttributes() { return ['value']; }
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attributeChangedCallback(name, oldValue, newValue, namespaceURI) {
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if (name === 'value') {
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const newPercentage = newValue === null ? 0 : parseInt(newValue);
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this._progressElement.setAttribute('aria-valuenow', newPercentage);
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this._label.textContent = newPercentage + '%';
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this._bar.style.width = newPercentage + '%';
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}
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}
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get progress() { return this.getAttribute('value'); }
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set progress(newValue) { this.setAttribute('value', newValue); }
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};
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customElements.define('custom-progress-bar', CustomProgressBar); |