24 lines
513 B
JavaScript
24 lines
513 B
JavaScript
const pro = new Promise((resolve, reject) => {
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console.log('开始百米短跑');
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const duration = Math.floor(Math.random() * 5000);
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setTimeout(() => {
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if (Math.random() < 0.5) {
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// 成功
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resolve(duration); // 将任务从挂起->完成
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} else {
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// 失败，脚扭伤了
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reject('脚扭伤了！');
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}
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}, duration);
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});
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pro.then(
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(data) => {
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console.log('on yeah! 我跑了', data, '秒');
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},
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(reason) => {
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console.log('不好意思，', reason);
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}
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);
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