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`‎doc/api/worker_threads.md‎`

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+3-6Lines changed: 3 additions & 6 deletions

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Original file line number	Diff line number	Diff line change
`@@ -1412,17 +1412,14 @@ port2.postMessage(new Foo());`
`1412`	`1412`	`// Prints: { c: 3 }`
`1413`	`1413`	```
`1414`	`1414`
`1415`		-This limitation extends to many built-in objects, such as the global `URL`
`1416`		`-object:`
	`1415`	`+Some built-in objects cannot be cloned at all. For example, posting a`
	`1416`	+`URL` object throws a `DataCloneError`:
`1417`	`1417`
`1418`	`1418`	```js
`1419`	`1419`	`const { port1, port2 } = new MessageChannel();`
`1420`	`1420`
`1421`		`-port1.onmessage = ({ data }) => console.log(data);`
`1422`		`-`
`1423`	`1421`	`port2.postMessage(new URL('https://example.org'));`
`1424`		`-`
`1425`		`-// Prints: { }`
	`1422`	`+// Throws DataCloneError: Cannot clone object of unsupported type.`
`1426`	`1423`	```
`1427`	`1424`
`1428`	`1425`	### `port.hasRef()`

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