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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 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 | 1x 1x 20x 11x 2x 9x 8x 1x 1x 1x 11x 11x 1x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 15x 15x 1x 9x 7x 7x 9x 1x 1x 9x 7x 4x 9x 1x 1x 9x 1x 9x 5x 5x 4x 4x 10x 10x 8x 8x 25x 25x 12x 7x 5x 13x 6x 7x 10x 10x 1x 7x 7x 3x 4x 8x 8x | import React, { Component } from 'react'; import { resolving, shallowCopy } from './util'; const TIMEOUT = 120000; const DELAY = 200; const packComponent = comp => (props) => { // class function if (typeof comp === 'function') { return React.createElement(comp, props); } else if (comp && typeof comp === 'object') { return React.cloneElement(comp, props); } return null; }; /* * options * @load `function` return a `Promise` instance * @resolveWeak `function` return webpack moduleid * @loading `React Element` * @error `React Element` * @delay `number` ms, loading view delay display * @timeout `number` ms, load timeout time */ const DEFAULTOPTIONS = { load: null, resolveWeak: null, loading: null, error: null, delay: DELAY, timeout: TIMEOUT }; const Dueimport = (option = {}) => { const { load, loading, error, delay, timeout, resolveWeak } = option; if (!load) { return null; } // The first letter of the react component // name is the uppercase const LoadingView = packComponent(loading); const ErrorView = packComponent(error); const isDelay = typeof delay === 'number' && delay !== 0; const isTimeout = typeof timeout === 'number' && timeout !== 0; const preload = () => load(); class AsyncComponent extends Component { constructor(props) { super(props); this.unmount = false; const { loaded, cur } = resolving(load, resolveWeak); this.state = { needDelay: isDelay, err: '', request: !loaded, LoadComponent: loaded ? cur : null }; this.retry = this.retry.bind(this); this.changeState = this.changeState.bind(this); this.inital = true; } changeState(state = {}) { Iif (this.unmount) { return false; } return this.setState(state); } retry() { this.loadComp(); } clearTime() { if (this.delayTime) { clearTimeout(this.delayTime); delete this.delayTime; } if (this.timeoutTime) { clearTimeout(this.timeoutTime); delete this.timeoutTime; } } loadComp() { if (isDelay) { this.delayTime = setTimeout(() => { this.changeState({ needDelay: false }); }, delay); } if (isTimeout) { this.timeoutTime = setTimeout(() => { this.changeState({ request: false, err: 'timeout' }); }, timeout); } if (!this.inital) { this.changeState({ request: true, err: '', needDelay: isDelay }); } preload().then((component) => { this.clearTime(); this.changeState({ request: false, err: '', LoadComponent: component }); }).catch((e) => { this.clearTime(); this.changeState({ request: false, err: e }); }); } componentWillUnmount() { this.unmount = true; } componentDidMount() { // client const { request } = this.state; if (request) { this.loadComp(); delete this.inital; } } render() { const { request, needDelay, err, LoadComponent } = this.state; if (request) { // empty if (needDelay) { return null; } return LoadingView(); } else if (err !== '') { return ErrorView({ onRetry: this.retry, error: err }); } return <LoadComponent {...this.props} />; } } AsyncComponent.preload = preload; return AsyncComponent; }; const Asyncimport = (initOptions = {}, dueOptions = {}) => { const mergeOption = shallowCopy({}, DEFAULTOPTIONS, initOptions, dueOptions); // `load` exist if (mergeOption.load) { return Dueimport(mergeOption); } return (stepOption = {}) => { const afterOption = shallowCopy({}, mergeOption, stepOption); return Dueimport(afterOption); }; }; export default Asyncimport; |