对于value = key的Typescript接口,可以理解为定义了一个接口,其中value和key是接口中的属性,其值相等。 以下是一个示例的Typescript接口定义: 代码语言:txt 复制 interface KeyValue { value: any; key: any; } 接口名为KeyValue,包含了value和key两个属性,类型为any。 接口的分类:接口可以分为普通接口和泛型...
(key: string, val: string): string; } // 实现这个方法的时候,要符合接口参数的规范 var md5: encrypt = function(key: string, val: string): string { return key + val; }; console.log(md5('zhang', 'ning'));// zhangning var sha11: encrypt = function(key: string, val: string): st...
interfaceTest{name:string;age: number;//可有可无sex?:boolean,hobby:()=>string,//自定义key 任意值[propname:string]:any,}//属性数量是Test 中定义好的let demo: Test= {name:'张三',age:18,hobby:():string=>{return'写代码'},//任意新valuedemo1:'233',demo2:0,demo3:true,...}; javasc...
(key: string, value: string): void; } const function1: Function1 = (key, value) => { console.log(key, value); }; // 会有报错提示 // function1(1,2) //正解 function1('dx', '永远18'); 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 6、interface 规范一个类 //...
interfaceMyObject<Kextendsstring,V>{key:K;value:V;}constobj:MyContextObject<string,number>={key:'someString',value:123,}; 4. 检查类型定义 确保你的类型定义是正确的,没有遗漏或错误: 代码语言:javascript 复制 interfaceMyObject{key:string;value:number;}constobj:MyObject={key:'someString'...
interfaceTest{name:string;age:number;//可有可无sex?:boolean,hobby:()=>string,//自定义key 任意值[propname:string]:any, }//属性数量是Test 中定义好的letdemo:Test= {name:'张三',age:18,hobby:():string=>{return'写代码'},//任意新valuedemo1:'233',demo2:0,demo3:true, ...
interfaceTest{name:string;age:number;//可有可无sex?:boolean,hobby:()=>string,//自定义key 任意值[propname:string]:any,}//属性数量是Test 中定义好的letdemo:Test={name:'张三',age:18,hobby:():string=>{return'写代码'},//任意新valuedemo1:'233',demo2:0,demo3:true,...};...
keyof操作符会将一个对象类型(注意这里是类型并不是值)的key组成联合类型返回。 interface IProps { name: string; count: number; } type Ikea = keyof IProps; // Ikea = 'name' | 'count' function testKeyof(props: Ikea): void { } extends ...
//加密的函数类型接口interface encrypt { (key:string,value:string):string;//参数必须是 key value,返回值必须是string}varmd5:encrypt =function(key:string,value:string):string{returnkey+value; } console.log(md5('name','张三')); 3. 可索引接口:数组、对象的约束 ...
type Props = { [key in Link]: U; } & { type: string;} 完整的: enum Link{ a = 'a', b = 'b', c = 'c' } interface Common{ name:string; age: number } interface A extends Common{ id: string; } interface B extends Common{ value: string | number; } interface C extends Co...