denoはいいぞ2019

入れ方

code:bash

code:bashrc

export PATH=~/.deno/bin:${PATH}

確認

code:bash

$ deno -v

deno: 0.3.2

v8: 7.4.238

typescript: 3.2.1

書いてみる

code:ts

import open = Deno.open

const {copy} = Deno

async function main() {

const f = await open("README.md", "w")

await copy(f, new StringReader("Hello Deno!"))

f.close()

}

main()

型定義とtsconfig.jsonを作る

code:bash

$ deno types > deno.d.ts

code:tsconfig.json

{

"compilerOptions": {

"target": "esnext",

"module": "esnext",

"baseUrl": "/Users/keroxp/Library/Caches",

"paths": {

}

}

}

http server立ててみる

code:ts

async function main() {

listenAndServe(":8888", async req => {

await req.respond({

status: 200,

headers: new Headers({

"content-type": "text/plain"

}),

body: new TextEncoder().encode("hello deno!")

})

});

}

main();