Get the type of a JavaScript object
System.Runtime.InteropServices.JavaScript.dll Returnstypeof()of the property. C# publicstringGetTypeOfProperty(stringpropertyName); Parameters propertyName String The name of the property. Returns String One of "undefined", "object", "boolean", "number", "bigint", "string", "symbol...
在JavaScript中,几乎所有的对象都是Object类型的实例,它们都会从Object.prototype继承属性和方法,虽然大部分属性都会被覆盖(shadowed)或者说被重写了(overridden)。 除此之外,Object还可以被故意的创建,但是这个对象并不是一个“真正的对象”(例如:通过Object.create(null)),或者通过一些手段改变对象,使其不再是一个“...
命名空間: System.Runtime.InteropServices.JavaScript 組件: System.Runtime.InteropServices.JavaScript.dll typeof()傳回 屬性。 C# 複製 public string GetTypeOfProperty (string propertyName); 參數 propertyName String 屬性的名稱。 傳回 String 其中一個 “undefined”、“object”...
Assembly: System.Runtime.InteropServices.JavaScript.dll Returns typeof() of the property. C# Kopiëren public string GetTypeOfProperty (string propertyName); Parameters propertyName String The name of the property. Returns String One of "undefined", "object", "boolean", "number", "bi...
JSType.MemoryView JSType.Number JSType.Object JSType.Promise<T> JSType.String JSType.Void Learn .NET API browser System.Runtime.InteropServices.JavaScript JSObject Methods C# לקריאה באנגלית שמור ...
实现非常经典的ReturnType<T>: const fn = (v: boolean) => { if (v) return 1 else return 2 } type a = MyReturnType<typeof fn> // should be "1 | 2" 首先不要被例子吓到了,觉得必须执行完代码才知道返回类型,其实 TS 已经帮我们推导好了返回类型,所以上面的函数fn的类型已经是这样了: ...
The getOwnPropertyDescriptor() method returns a property descriptor for a specific property of an object. In this tutorial, you will learn about the JavaScript Object.getOwnPropertyDescriptor() method with the help of examples.
The getOwnPropertyDescriptors() method returns the property descriptors for all the properties of the given object. In this tutorial, you will learn about the JavaScript Object.getOwnPropertyDescriptors() method with the help of examples.
setPrototypeOf(target, proto):拦截 Object.setPrototypeOf(proxy, proto),返回一个布尔值。如果目标对象是函数,那么还有两种额外操作可以拦截。 apply(target, object, args):拦截 Proxy 实例作为函数调用的操作,比如 proxy(…args)、proxy.call(object, …args)、proxy.apply(…)。