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denoland-deno/cli/tests/node_compat/polyfill_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.

---------

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

25 lines
783 B
JavaScript

// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
import process from "node:process";
import { Buffer } from "node:buffer";
import {
clearImmediate,
clearInterval,
clearTimeout,
setImmediate,
setInterval,
setTimeout,
} from "node:timers";
import { performance } from "node:perf_hooks";
import console from "node:console";
globalThis.Buffer = Buffer;
globalThis.clearImmediate = clearImmediate;
globalThis.clearInterval = clearInterval;
globalThis.clearTimeout = clearTimeout;
globalThis.console = console;
globalThis.global = globalThis;
globalThis.performance = performance;
globalThis.process = process;
globalThis.setImmediate = setImmediate;
globalThis.setInterval = setInterval;
globalThis.setTimeout = setTimeout;
delete globalThis.window;