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Module

x/oasis/reflect-deno.ts>Reflect.hasOwnMetadata

An object oriented Discordeno framework
Latest
function Reflect.hasOwnMetadata
import { Reflect } from "https://deno.land/x/oasis@2.1.0/reflect-deno.ts";
const { hasOwnMetadata } = Reflect;

Gets a value indicating whether the target object has the provided metadata key defined.

Examples

class Example { }

// constructor result = Reflect.hasOwnMetadata("custom:annotation", Example);

Parameters

metadataKey: any

A key used to store and retrieve metadata.

target: any

The target object on which the metadata is defined.

Returns

boolean

true if the metadata key was defined on the target object; otherwise, false.

Gets a value indicating whether the target object has the provided metadata key defined.

Examples

class Example { // property declarations are not part of ES6, though they are valid in TypeScript: // static staticProperty; // property;

static staticMethod(p) { } method(p) { } }

// property (on constructor)
result = Reflect.hasOwnMetadata("custom:annotation", Example, "staticProperty");

// property (on prototype)
result = Reflect.hasOwnMetadata("custom:annotation", Example.prototype, "property");

// method (on constructor)
result = Reflect.hasOwnMetadata("custom:annotation", Example, "staticMethod");

// method (on prototype)
result = Reflect.hasOwnMetadata("custom:annotation", Example.prototype, "method");

Parameters

metadataKey: any

A key used to store and retrieve metadata.

target: any

The target object on which the metadata is defined.

propertyKey: string | symbol

The property key for the target.

Returns

boolean

true if the metadata key was defined on the target object; otherwise, false.