Deno Is a Browser for Code
The key paragraph:<p>> The Deno CLI works like a browser, but for code. You import a URL in the code and Deno will go and fetch that code and cache it locally, just like a browser. Also, like a browser, your code runs in a sandbox, which has zero trust of the code you are running, irrespective of the source. You, the person invoking the code, get to tell that code what it can and can’t do, externally. Also, like a browser, code can ask you permission to do things, which you can choose to grant or deny.<p>The big problem with Deno is that permissions, once granted, apply to <i>every</i> imported URL. You cannot ask it to let one script access the file system, another access network and the rest of them run fully sandboxed. This makes it so that you either only import scripts you already fully trust (making the permission system useless) or don't allow any access (making the ecosystem useless).