function executionAsyncResource
Usage in Deno
```typescript import { executionAsyncResource } from "node:node__async_hooks.d.ts"; ```
executionAsyncResource(): object
Resource objects returned by `executionAsyncResource()` are most often internal
Node.js handle objects with undocumented APIs. Using any functions or properties
on the object is likely to crash your application and should be avoided.
Using `executionAsyncResource()` in the top-level execution context will
return an empty object as there is no handle or request object to use,
but having an object representing the top-level can be helpful.
```js
import { open } from 'node:fs';
import { executionAsyncId, executionAsyncResource } from 'node:async_hooks';
console.log(executionAsyncId(), executionAsyncResource()); // 1 {}
open(new URL(import.meta.url), 'r', (err, fd) => {
console.log(executionAsyncId(), executionAsyncResource()); // 7 FSReqWrap
});
```
This can be used to implement continuation local storage without the
use of a tracking `Map` to store the metadata:
```js
import { createServer } from 'node:http';
import {
executionAsyncId,
executionAsyncResource,
createHook,
} from 'node:async_hooks';
const sym = Symbol('state'); // Private symbol to avoid pollution
createHook({
init(asyncId, type, triggerAsyncId, resource) {
const cr = executionAsyncResource();
if (cr) {
resource[sym] = cr[sym];
}
},
}).enable();
const server = createServer((req, res) => {
executionAsyncResource()[sym] = { state: req.url };
setTimeout(function() {
res.end(JSON.stringify(executionAsyncResource()[sym]));
}, 100);
}).listen(3000);
```
object
The resource representing the current execution. Useful to store data within the resource.