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grafana/public/app/core/components/BouncingLoader/BouncingLoader.tsx

119 lines
2.7 KiB

import { css, keyframes } from '@emotion/css';
import { GrafanaTheme2 } from '@grafana/data';
import { useStyles2 } from '@grafana/ui';
import grafanaIconSvg from 'img/grafana_icon.svg';
import { t } from '../../internationalization';
export function BouncingLoader() {
const styles = useStyles2(getStyles);
return (
<div
className={styles.container}
aria-live="polite"
role="status"
aria-label={t('bouncing-loader.label', 'Loading')}
>
<div className={styles.bounce}>
<img alt="" src={grafanaIconSvg} className={styles.logo} />
</div>
</div>
);
}
const fadeIn = keyframes({
'0%': {
opacity: 0,
animationTimingFunction: 'cubic-bezier(0, 0, 0.5, 1)',
},
'100%': {
opacity: 1,
},
});
const pulse = keyframes({
'0%': {
opacity: 0,
},
'50%': {
opacity: 1,
},
'100%': {
opacity: 0,
},
});
const bounce = keyframes({
'from, to': {
transform: 'translateY(0px)',
animationTimingFunction: 'cubic-bezier(0.3, 0, 0.1, 1)',
},
'50%': {
transform: 'translateY(-50px)',
animationTimingFunction: 'cubic-bezier(0.9, 0, 0.7, 1)',
},
});
const squash = keyframes({
'0%': {
transform: 'scaleX(1.3) scaleY(0.8)',
animationTimingFunction: 'cubic-bezier(0.3, 0, 0.1, 1)',
},
'15%': {
transform: 'scaleX(0.75) scaleY(1.25)',
animationTimingFunction: 'cubic-bezier(0, 0, 0.7, 0.75)',
},
'55%': {
transform: 'scaleX(1.05) scaleY(0.95)',
animationTimingFunction: 'cubic-bezier(0.9, 0, 1, 1)',
},
'95%': {
transform: 'scaleX(0.75) scaleY(1.25)',
animationTimingFunction: 'cubic-bezier(0, 0, 0, 1)',
},
'100%': {
transform: 'scaleX(1.3) scaleY(0.8)',
animationTimingFunction: 'cubic-bezier(0, 0, 0.7, 1)',
},
});
const getStyles = (theme: GrafanaTheme2) => ({
container: css({
opacity: 0,
[theme.transitions.handleMotion('no-preference')]: {
animationName: fadeIn,
animationIterationCount: 1,
animationDuration: '0.9s',
animationDelay: '0.5s',
animationFillMode: 'forwards',
},
[theme.transitions.handleMotion('reduce')]: {
animationName: pulse,
animationIterationCount: 'infinite',
animationDuration: '4s',
animationDelay: '0.5s',
},
}),
bounce: css({
textAlign: 'center',
[theme.transitions.handleMotion('no-preference')]: {
animationName: bounce,
animationDuration: '0.9s',
animationIterationCount: 'infinite',
},
}),
logo: css({
display: 'inline-block',
[theme.transitions.handleMotion('no-preference')]: {
animationName: squash,
animationDuration: '0.9s',
animationIterationCount: 'infinite',
},
width: '60px',
height: '60px',
}),
});