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denoland-deno/ext/node/polyfills/00_globals.js
Luca Casonato e511022c74
feat(ext/node): properly segregate node globals (#19307)
Code run within Deno-mode and Node-mode should have access to a
slightly different set of globals. Previously this was done through a
compile time code-transform for Node-mode, but this is not ideal and has
many edge cases, for example Node's globalThis having a different
identity than Deno's globalThis.

This commit makes the `globalThis` of the entire runtime a semi-proxy.
This proxy returns a different set of globals depending on the caller's
mode. This is not a full proxy, because it is shadowed by "real"
properties on globalThis. This is done to avoid the overhead of a full
proxy for all globalThis operations.

The globals between Deno-mode and Node-mode are now properly segregated.
This means that code running in Deno-mode will not have access to Node's
globals, and vice versa. Deleting a managed global in Deno-mode will
NOT delete the corresponding global in Node-mode, and vice versa.

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Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
Co-authored-by: Aapo Alasuutari <aapo.alasuutari@gmail.com>
2023-07-19 10:30:04 +02:00

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JavaScript

// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
// deno-lint-ignore-file
export const denoGlobals = globalThis.__bootstrap.ext_node_denoGlobals;
export const nodeGlobals = globalThis.__bootstrap.ext_node_nodeGlobals;