43 lines
1.1 KiB
HTML
43 lines
1.1 KiB
HTML
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Document</title>
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</head>
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<body>
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<script>
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// 定义一个Promise方法
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function func() { // 正常 异常
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return new Promise((resolve, reject) => {
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setTimeout(() => {
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let data = { n: "想不到吧, 我三秒后才出现, 你们抓不到我的" }
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if (Math.random() > 0.5) {
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resolve(data);
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} else {
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reject("完蛋了, bbq");
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}
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}, 1000);
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});
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}
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// func().then() // 正常
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// func().catch() // 异常
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func()
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.then(res => {
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console.log(res);
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})
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.catch(e => {
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console.error(e);
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})
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console.log("end");
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</script>
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</body>
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</html>
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