Getting values from Deno stdin

Question

How can we get values from standard input in Deno?

I don\'t know how to use Deno.stdin.

An example would be appreciated.

Answer 1

Deno.stdin is of type File, thus you can read from it by providing a Uint8Array as buffer and call Deno.stdin.read(buf)

window.onload = async function main() {
  const buf = new Uint8Array(1024);
  /* Reading into `buf` from start.
   * buf.subarray(0, n) is the read result.
   * If n is instead Deno.EOF, then it means that stdin is closed.
   */
  const n = await Deno.stdin.read(buf); 
  if (n == Deno.EOF) {
    console.log("Standard input closed")
  } else {
    console.log("READ:", new TextDecoder().decode(buf.subarray(0, n)));
  }
}