// 通过接口(interface) 声明对象类型interfaceInfoType{readonlyname:string// 只读属性age?:number// 可选属性height:number}// 指定对象的类型constinfo:InfoType= {name:'zhangsan',age:20,height:170}console.log(info.name);// info.name = 'lisi'; // 只读属性不能修改info.age=22;// 可以修改 如上...
timeout=10000}";letkeyValuePairs = string.slice(1,-1)//remove first and last character.split(/\s*,\s*/)//split with optional spaces around the comma.map(chunk=>chunk.split("="));//split key=valueconstmap =newMap(keyValuePairs);console.log(map.get("executionid"));console.log(ma...
}typeStringOrNumberFunc=(ns:string|number) =>void;letfunc:StringOrNumberFunc= fn;// 不能将类型“(x: string) => void”分配给类型“StringOrNumberFunc”。// 参数“x”和“ns” 的类型不兼容。// 不能将类型“string | number”分配给类型“string”。// 不能将类型“string | number”分配给类...
[StringLiteral<Value>,Rest]:ParseMemberExpression<T>;typeParseCallExpression<T>=Trim<T>extends''?...
Make keyof only return strings instead of string, numbers or symbols. Legacy option. <TypeScriptUseDefineForClassFields> --useDefineForClassFields Emit ECMAScript-standard-compliant class fields. <TypeScriptDeclarationMap> --declarationMap Create sourcemaps for d.ts files. <TypeScriptResolveJsonModule...
constructor(name:string) { this.#name=name; } greet() { console.log(`Hello, my name is${this.#name}!`); } } letjeremy=newPerson("Jeremy Bearimy"); jeremy.#name; // ~~~ // Property '#name' is not accessible outside class 'Person' //...
1023 错误 An index signature parameter type must be 'string' or 'number'. 索引签名参数类型必须为 "string" 或 "number"。1024 错误 'readonly' modifier can only appear on a property declaration or index signature. 1028 错误 Accessibility modifier already seen. 已看到可访问性修饰符。1029 错误 '...
code 类型 英文描述 中文描述 1002 错误 Unterminated string literal. 未终止的字符串文本。 1003 错误 Identifier expected. 应为标识符。 1005 错误 '{0}' expected. 应为“{0}”。
classPerson{#name:stringconstructor(name:string){this.#name=name;}greet(){console.log(`Hello, my name is${this.#name}!`);}}letjeremy=newPerson("Jeremy Bearimy");jeremy.#name// ~~~// Property '#name' is not accessible outside class 'Person'// because it has a private identifier...
type EnthusiasticGreeting<T extends string> = `${Uppercase<T>}` type HELLO = EnthusiasticGreeting<"hello">; // same as // type HELLO = "HELLO"; The new type aliases are Uppercase, Lowercase, Capitalize and Uncapitalize. The first two transform every character in a string, and the latter...