Denoのマニュアルで気になった所を試してみる

$ docker run --rm-it hayd/alpine-deno run https://deno.land/std/examples/welcome.ts
Welcome to Deno 🦕

import{serve}from"https://deno.land/std@0.50.0/http/server.ts";consts=serve({port:8000});console.log("http://localhost:8000/");forawait(constreqofs){req.respond({body:"Hello World\n"});}

$ docker run --rm-it--init-p 8000:8000 -v$PWD:/app hayd/alpine-deno run /app/server.ts
...
error: Uncaught PermissionDenied: network access to "0.0.0.0:8000", run again with the --allow-net flag

$ docker run --rm-it--init-p 8000:8000 -v$PWD:/app hayd/alpine-deno run --allow-net /app/server.ts

constfilenames=Deno.args;for(constfilenameoffilenames){constfile=awaitDeno.open(filename);awaitDeno.copy(file,Deno.stdout);file.close();}

Deno is a simple, modern and secure runtime for JavaScript and TypeScript that uses V8 and is built in Rust.

$ docker run --rm-it--init-v$PWD:/app hayd/alpine-deno run --allow-read /app/cat.ts /app/sample.txt
> Deno is a simple, modern and secure runtime for JavaScript and TypeScript that uses V8 and is built in Rust.

import{assertEquals}from"https://deno.land/std/testing/asserts.ts";Deno.test("simple",()=>{constx=1+2;assertEquals(x,3);});

$ docker run --rm-it--init-v$PWD:/app hayd/alpine-deno test /app/simple.test.ts
running 1 tests
test simple ... ok (3ms)test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out (4ms)

$ docker run --rm-it--init-p 9229:9229 -v$PWD:/app hayd/alpine-deno run --inspect-brk=0.0.0.0:9229 --allow-read /app/cat.ts /app/sample.txt
Debugger listening on ws://127.0.0.1:9229/ws/xxxxx