123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566
#!/usr/bin/env -S deno run --unstable
import { BufReader } from "https://deno.land/std@0.99.0/io/bufio.ts";import { tty } from "../../ansi/tty.ts";import { Figures } from "../../prompt/figures.ts";import { prompt } from "../../prompt/prompt.ts";import { Input } from "../../prompt/input.ts";
const result = await prompt([{  name: "text",  message: `Enter some text`,  // build-in prompt  type: Input,}, {  name: "customText",  message: `Enter more text`,  // using an object/method as custom prompt  type: {    async prompt(options: { message: string }): Promise<string> {      const message = ` ? ${options.message} ${Figures.POINTER_SMALL} `;      await Deno.stdout.write(new TextEncoder().encode(message));
      const result = await new BufReader(Deno.stdin).readLine();
      return result ? new TextDecoder().decode(result.line) : "";    },  },}, {  name: "customNumber",  message: `Enter a number`,  // using a class as custom prompt  type: class CustomPrompt {    static async prompt(      options: { message: string },      error?: string,    ): Promise<number> {      const message = ` ? ${options.message} ${Figures.POINTER_SMALL} `;      await Deno.stdout.write(new TextEncoder().encode(message));
      if (error) {        tty.cursorSave();        await Deno.stdout.write(new TextEncoder().encode("\n " + error));        tty.cursorRestore();      }
      const readLineResult = await new BufReader(Deno.stdin).readLine();      const result = Number(        readLineResult ? new TextDecoder().decode(readLineResult.line) : null,      );
      if (isNaN(result)) {        tty.cursorLeft.cursorUp.eraseDown();        return this.prompt(options, `${result} is not a number.`);      }
      return result;    }  },}]);
console.log(result);
// if ( result.foo ) {} // error: Property 'foo' does not exist// if ( result.customText && isNaN( result.customText ) ) {} // error: Argument of type 'string' is not assignable to parameter of type 'number'.// if ( result.customNumber && isNaN( result.customNumber ) ) {} // no error: customNumber is of type number