// Cannot invoke an object which is possibly 'undefined'.(2722) const num1 = numGenerator(); // Error const num2 = numGenerator!(); //OK } 因为!非空断言操作符会从编译生成的 JavaScript 代码中移除,所以在实际使用的过程中,要特别注意。比如下面这个例子: const a: number | undefined = unde...
1.1 忽略 undefined 和 null 类型functionmyFunc(maybeString:string|undefined|null){ // Type 'string | null | undefined' is not assignable to type 'string'. // Type 'undefined' is not assignable to type 'string'. constonlyString:string= maybeString;// Error constignoreUndefinedAndNull:string= ...
typeNumGenerator =() =>number;functionmyFunc(numGenerator: NumGenerator |undefined) {// Object is possibly 'undefined'.(2532)// Cannot invoke an object which is possibly 'undefined'.(2722)const num1 =numGenerator();// Errorconst num2 = numGenerator!();//OK } 因为!非空断言操作符会从编...
type NumGenerator = () => number; function myFunc(numGenerator: NumGenerator | undefined) { // Object is possibly 'undefined'.(2532) // Cannot invoke an object which is possibly 'undefined'.(2722) const num1 = numGenerator(); // Error const num2 = numGenerator!(); //OK } 1. 2....
TS2532: Object is possibly 'undefined'. 4729 0 5 老师你好,add1类型是Object、object、Function的时候都可以将sum进行赋值是为什么呢 494 0 4 不是基于ts开发吗? 348 0 5 老师,Object类型不能表示所有类型的父类吧 613 0 3 TypeError: 'CClass' object is not callabl 1684 0 1 ...
1.2 调用函数时忽略 undefined 类型 代码语言:javascript 复制 typeNumGenerator=()=>number;functionmyFunc(numGenerator:NumGenerator|undefined){// Object is possibly 'undefined'.(2532)// Cannot invoke an object which is possibly 'undefined'.(2722)constnum1=numGenerator();// Errorconstnum2=numGenerator...
I've been looking at the questions and answers regarding this TypeScript error but none of them are the same as the problem as the one I will describe here as far as I know. The exact error I get is: TS2532: Object is possibly 'undefined'. where self.session had a ...
2366 错误 Function lacks ending return statement and return type does not include 'undefined'. 2368 错误 Type parameter name cannot be '{0}' 类型参数名称不能为“{0}”2369 错误 A parameter property is only allowed in a constructor implementation. 只允许在构造函数实现中使用参数属性。2370 错误 ...
TS2532: Object is possibly 'undefined' inside an array Ask Question Asked 1 year, 7 months ago Modified 1 year, 7 months ago Viewed 928 times Report this ad1 I'm beginning my path in Typescript and got a problem that i can solve. I'm trying to acess one index of one array inside...
: boolean; constructor() { this.foo = 42; } } 3.强制链式调用 // 这里 Error对象定义的stack是可选参数,如果这样写的话编译器会提示 // 出错 TS2532: Object is possibly 'undefined'. new Error().stack.split('\n'); // 我们确信这个字段100%出现,那么就可以添加!,强调这个字段一定存在 new ...