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Encapsulation doesn't work when property throws an error #29
Description
Hi,
Encapsulation doesn't work when the object has properties that throw errors. These properties should be ignored.
To reproduce, open this HTML file in browser.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<script type="module">
import { Typeson } from "https://cdn.jsdelivr.net/npm/typeson@7.0.1/dist/typeson.esm.js";
new Typeson().encapsulate(Object.getPrototypeOf(navigator));
</script>
<script type="module">
import { Typeson } from "https://cdn.jsdelivr.net/npm/typeson@7.0.1/dist/typeson.esm.js";
const foo = {};
Object.defineProperty(foo, "bar", {
enumerable: true,
get() { throw Error("baz"); },
});
console.log(new Typeson().encapsulate(foo));
</script>
</head>
</html>This two errors are logged in console of Firefox:
Uncaught TypeError: 'get permissions' called on an object that does not implement interface Navigator.
_encapsulate https://cdn.jsdelivr.net/npm/typeson@7.0.1/dist/typeson.esm.js:1142
_adaptBuiltinStateObjectProperties https://cdn.jsdelivr.net/npm/typeson@7.0.1/dist/typeson.esm.js:957
_encapsulate https://cdn.jsdelivr.net/npm/typeson@7.0.1/dist/typeson.esm.js:1141
_encapsulate https://cdn.jsdelivr.net/npm/typeson@7.0.1/dist/typeson.esm.js:1135
encapsulate https://cdn.jsdelivr.net/npm/typeson@7.0.1/dist/typeson.esm.js:894
<anonymous> file:///home/regseb/testcase/index.html:7
typeson.esm.js:1142:25
Uncaught Error: baz
get file:///home/regseb/testcase/index.html:14
_encapsulate https://cdn.jsdelivr.net/npm/typeson@7.0.1/dist/typeson.esm.js:1142
_adaptBuiltinStateObjectProperties https://cdn.jsdelivr.net/npm/typeson@7.0.1/dist/typeson.esm.js:957
_encapsulate https://cdn.jsdelivr.net/npm/typeson@7.0.1/dist/typeson.esm.js:1141
_encapsulate https://cdn.jsdelivr.net/npm/typeson@7.0.1/dist/typeson.esm.js:1135
encapsulate https://cdn.jsdelivr.net/npm/typeson@7.0.1/dist/typeson.esm.js:894
<anonymous> file:///home/regseb/testcase/index.html:16
index.html:14:27
Or these errors in Chromium:
Uncaught TypeError: Illegal invocation
at typeson.esm.js:1142:47
at _adaptBuiltinStateObjectProperties (typeson.esm.js:957:9)
at typeson.esm.js:1141:13
at Array.forEach (<anonymous>)
at _encapsulate (typeson.esm.js:1135:23)
at Typeson.encapsulate (typeson.esm.js:894:17)
at index.html:7:23
Uncaught Error: baz
at Object.get [as bar] (index.html:14:27)
at typeson.esm.js:1142:47
at _adaptBuiltinStateObjectProperties (typeson.esm.js:957:9)
at typeson.esm.js:1141:13
at Array.forEach (<anonymous>)
at _encapsulate (typeson.esm.js:1135:23)
at Typeson.encapsulate (typeson.esm.js:894:17)
at index.html:16:35
Activity
brettz9 commentedon Apr 30, 2022
One key use case of typeson is for structured cloning (as available in
typeson-registry).In structured clonining, Chrome and Firefox will both throw if you call
structuredClone(Object.getPrototypeOf(navigator)).But perhaps we could accept a PR to add configuration to allow ignoring such errors.
brettz9 commentedon Jul 31, 2026
If you are still interested, please have a look at #57 to see if that meets your needs...
feat: add `encapsulateError` option for control of throwing properties;
feat: add `encapsulateError` option for control of throwing properties;
brettz9 commentedon Aug 6, 2026
Released in v10.1.0