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Add global __metadata function

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When `emitDecoratorMetadata` compiler option is set to true in `tsconfig.json`, TypeScript generates some calls to `__metadata` function.
By default in our NativeScript TypeScript projects the `noEmitHelpers` option is set to true, so TypeScript compiler does not generate the `__metadata` function.
So the application crashes at runtime. Add the missing method, so we can have both `noEmitHelpers` and `emitDecoratorMetadata` set to true in `tsconfig.json`.
This commit is contained in:
rosen-vladimirov
2016-02-18 08:52:13 +02:00
parent a6700d3b11
commit 4be31e2b04
1 changed files with 8 additions and 0 deletions
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8
globals/globals.ts
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@@ -119,6 +119,14 @@ if (typeof global.__decorate !== "function") {
}
}
if (typeof global.__metadata !== "function") {
global.__metadata = function (k, v) {
if (typeof global.Reflect === "object" && typeof global.Reflect.metadata === "function") {
return global.Reflect.metadata(k, v);
}
};
}
export function Deprecated(target: Object, key?: string | symbol, descriptor?: any) {
if (descriptor) {
var originalMethod = descriptor.value;