22 lines
363 B
TypeScript
22 lines
363 B
TypeScript
let id: number | string = 1;
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interface User {
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name: string;
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age?: number;
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}
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id = "hello"
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const userA: User = {
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name: "小李",
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age: 18
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}
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const userB: User = {
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name: "小柔"
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}
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console.log(userA, userB);
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// 任务：
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// 1. 把 id 改成字符串也试一次
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// 2. 创建一个带 age 的 userA
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// 3. 创建一个不带 age 的 userB
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// 4. 输出它们
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