Now, let’s write a bit complex code using one of our favorite code editors – VS Code.
In case if you don’t have VSCode installed on your machine, get it from the code.visualstudio.com, it’s free 🙂
We also recommend installing the deno vscode extension from the visual studio marketplace.
This extension will add deno support for the visual studio code.
Deno using VSCode
Now, Let’s open the VSCode, create a file named “helloworld.ts” and paste the given code(taken from deno.land).
Now, running this code we would expect “Hello World” as output into the browser window.
Let’s run it using the run command:
deno run helloworld.ts
We got this error:
Uncaught PermissionDenied: network access to “127.0.0.1:8000”, run again with the –allow-net flag
Why this error?
💡 Deno is secure by default.
Therefore, unless we specifically enable it, a deno module has no excess to file, network, or environment. So, we need to grant permission explicitly.
||For accessing the net|
||For reading files|
||For writing files|
For our code, in order to solve this error, we need to pass the additional flag
–allow-net along with
deno run command.
deno run --allow-net helloworld.ts
This will run our program and ask us to navigate to
http://localhost:8000/ using the Ctrl + Click.
In this section, we have learned: