Progress Indicator: Examples
Extended indicator with a custom visual
LionProgressIndicator
is designed to be extended to add visuals. Implement the _graphicTemplate()
method to set the rendered content and apply styles normally.
Example extension
class CustomProgressIndicator extends LionProgressIndicator {
static get styles() {
return [
css`
:host {
display: block;
}
.progress--icon {
display: inline-block;
width: 48px;
height: 48px;
animation: spinner-rotate 2s linear infinite;
}
.progress--icon--circle {
animation: spinner-dash 1.35s ease-in-out infinite;
fill: none;
stroke-width: 6px;
stroke: var(--primary-color);
stroke-dasharray: 100, 28; /* This is a fallback for IE11 */
}
@keyframes spinner-rotate {
to {
transform: rotate(360deg);
}
}
@keyframes spinner-dash {
0% {
stroke-dasharray: 6, 122;
stroke-dashoffset: 0;
}
50% {
stroke-dasharray: 100, 28;
stroke-dashoffset: -16;
}
100% {
stroke-dasharray: 6, 122;
stroke-dashoffset: -127;
}
}
`,
];
}
_graphicTemplate() {
return html`
<svg class="progress--icon" viewBox="20 20 47 47">
<circle class="progress--icon--circle" cx="44" cy="44" r="20.2" />
</svg>
`;
}
}
Result
export const main = () => html` <custom-progress-indicator></custom-progress-indicator> `;