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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 | 1x 1x 1x 1x 1x 5x 1x 5x 12x 12x 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 { sizeMarginDefaults, sizeMarginKeys } from "./helpers"; import { PrecompiledCss, LoaderSizeMarginProps, StyleFunctionWithIndex } from "./interfaces"; const pulse: Keyframes = keyframes` 0% {transform: scale(1);opacity: 1} 45% {transform: scale(0.1);opacity: 0.7} 80% {transform: scale(1);opacity: 1} `; class Loader extends React.PureComponent<LoaderSizeMarginProps> { public static defaultProps: LoaderSizeMarginProps = sizeMarginDefaults(15); public style: StyleFunctionWithIndex = (i: number): PrecompiledCss => { const { color, size, sizeUnit, margin } = this.props; return css` background-color: ${color}; width: ${`${size}${sizeUnit}`}; height: ${`${size}${sizeUnit}`}; margin: ${margin}; border-radius: 100%; display: inline-block; animation: ${pulse} 0.75s ${i * 0.12}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> ) : null; } } const Component: React.ComponentClass<LoaderSizeMarginProps> = onlyUpdateForKeys(sizeMarginKeys)( Loader ); Component.defaultProps = Loader.defaultProps; export default Component; |