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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 | 1x 1x 1x 1x 1x 5x 1x 5x 20x 20x 1x 5x 5x 1x 1x 1x 1x | /** @jsx jsx */ import * as React from "react"; import { keyframes, css, jsx } from "@emotion/core"; import { Keyframes } from "@emotion/serialize"; import onlyUpdateForKeys from "recompose/onlyUpdateForKeys"; import { heightWidthRadiusDefaults, heightWidthRadiusKeys } from "./helpers"; import { PrecompiledCss, LoaderHeightWidthRadiusProps, StyleFunctionWithIndex } from "./interfaces"; const scale: Keyframes = keyframes` 0% {transform: scaley(1.0)} 50% {transform: scaley(0.4)} 100% {transform: scaley(1.0)} `; class Loader extends React.PureComponent<LoaderHeightWidthRadiusProps> { public static defaultProps: LoaderHeightWidthRadiusProps = heightWidthRadiusDefaults(35, 4, 2); public style: StyleFunctionWithIndex = (i: number): PrecompiledCss => { const { color, width, height, margin, radius, widthUnit, heightUnit, radiusUnit } = this.props; return css` background-color: ${color}; width: ${`${width}${widthUnit}`}; height: ${`${height}${heightUnit}`}; margin: ${margin}; border-radius: ${`${radius}${radiusUnit}`}; display: inline-block; animation: ${scale} 1s ${i * 0.1}s infinite cubic-bezier(0.2, 0.68, 0.18, 1.08); animation-fill-mode: both; `; }; public render(): JSX.Element | null { const { loading, css } = this.props; return loading ? ( <div css={[css]}> <div css={this.style(1)} /> <div css={this.style(2)} /> <div css={this.style(3)} /> <div css={this.style(4)} /> <div css={this.style(5)} /> </div> ) : null; } } const Component: React.ComponentClass<LoaderHeightWidthRadiusProps> = onlyUpdateForKeys( heightWidthRadiusKeys )(Loader); Component.defaultProps = Loader.defaultProps; export default Component; |