| setInterval(() => console.log(import.meta.url), 1000); |
| export default "a"; |
This example demonstrates how to polyfill the "fetch" event in Deno, and gives an example for how this can be used to run Cloudflare Workers in Deno.
To try it locally run the script below, and visit http://0.0.0.0:8080:
$ deno run --allow-net https://gist.githubusercontent.com/lucacasonato/1a30a4fa6ef6c053a93f271675ef93fc/raw/efcdc8e798604e194831830fcb962b50261384b3/example-worker.js
| { | |
| "$schema": "https://dprint.dev/schemas/v0.json", | |
| "projectType": "openSource", | |
| "incremental": true, | |
| "typescript": { | |
| "deno": true, | |
| "useTabs": true | |
| }, | |
| "includes": ["**/*.{ts,tsx,js,jsx}"], | |
| "excludes": ["**/node_modules"], |
Supporting expressing resolution entirely in code
TypeScript’s module resolution for type definitions currently heavily relies on probing. Some examples of this are how node_modules/ folders are probed for @types/ packages when a bare specifier is imported that does not provide it’s own types, or how importing a file with a .js extension will resolve types to a sibling file with a .d.ts extension instead.
Probing is problematic for us at Deno, because we are unable to perform any kind of probing when importing files using https:// specifiers. This is because it is neither side-effect free to perform probing on https:// (ie it is observable), and it is incredibly slow because of network round trip times. Non Deno TypeScript users have also reported similar issues with probing due to reliance on network file systems (microsoft/TypeScript#11979).
Additionally, probing has a performance impact for all users regardl
| import { CountingGovernor } from "./governor.ts"; | |
| const tests: { name: string; fn: () => Promise<void> }[] = []; | |
| function test(name: string, fn: () => Promise<void>) { | |
| tests.push({ name, fn }); | |
| } | |
| test("test 1", async () => { | |
| await new Promise((resolve) => setTimeout(resolve, 100)); |
| Copyright 2026 Deno Land Inc. | |
| Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: | |
| The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. | |
| THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OT |