基本兼容性
可多不可少
正确示例：
interface TestInterface { name: string; } let p1 = {name: 'yangbuyiya'}; let p2 = {age: 18}; let p3 = {name: 'yangbuyiya', age: 18}; let t: TestInterface; t = p1; t = p3;
错误示例：
interface TestInterface { name: string; } let p1 = {name: 'yangbuyiya'}; let p2 = {age: 18}; let p3 = {name: 'yangbuyiya', age: 18}; let t: TestInterface; t = p1; t = p2; t = p3;
会递归检查
改造如上接口约束代码，添加子属性如下：
interface TestInterface { name: string; children: { age: number }; }
然后再次进行测试，正确示例：
interface TestInterface { name: string; children: { age: number }; } let p1 = {name: 'yangbuyiya', children: {age: 18}}; let p2 = {name: 'yangbuyiya', children: {age: 'abc'}}; let t: TestInterface; t = p1;
错误示例，因为 p2 当中的 age 属性是字符串类型：
interface TestInterface { name: string; children: { age: number }; } let p1 = {name: 'yangbuyiya', children: {age: 18}}; let p2 = {name: 'yangbuyiya', children: {age: 'abc'}}; let t: TestInterface; t = p1; t = p2;
最后
本期结束咱们下次再见👋~
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