Fixing net::ERR_NO_SUPPORTED_PROXIES

import puppeteer from "puppeteer"; // npm i puppeteer

// No SOCKS needed: the HTTP port takes the login through page.authenticate().
const browser = await puppeteer.launch({ args: ["--proxy-server=http://via.proxies.vision:9000"] });
try {
  const page = await browser.newPage();
  await page.authenticate({ username: `${process.env.PROXY_USER}-country-de`, password: process.env.PROXY_PASS });
  await page.goto("https://ipinfo.io/json");
  console.log(await page.evaluate(() => document.body.innerText));
} finally {
  await browser.close();
}

import puppeteer from "puppeteer";
import { anonymizeProxy, closeAnonymizedProxy } from "proxy-chain"; // npm i puppeteer proxy-chain

const user = encodeURIComponent(`${process.env.PROXY_USER}-country-de`);
const pass = encodeURIComponent(process.env.PROXY_PASS);

// Chrome takes no login in --proxy-server and none at all for SOCKS5.
// proxy-chain opens a local proxy without a login that forwards to ours with it.
const local = await anonymizeProxy(`socks5://${user}:${pass}@via.proxies.vision:11000`);

const browser = await puppeteer.launch({ args: [`--proxy-server=${local}`] });
try {
  const page = await browser.newPage();
  await page.goto("https://ipinfo.io/json");
  console.log(await page.evaluate(() => document.body.innerText));
} finally {
  await browser.close();
  await closeAnonymizedProxy(local, true);
}

import { chromium } from "playwright";
import { anonymizeProxy, closeAnonymizedProxy } from "proxy-chain"; // npm i playwright proxy-chain

const user = encodeURIComponent(`${process.env.PROXY_USER}-country-de`);
const pass = encodeURIComponent(process.env.PROXY_PASS);

// Playwright refuses SOCKS5 with a username in every browser; hand it a local proxy instead.
const local = await anonymizeProxy(`socks5://${user}:${pass}@via.proxies.vision:11000`);
const browser = await chromium.launch({ proxy: { server: local } });
try {
  const page = await browser.newPage();
  await page.goto("https://ipinfo.io/json");
  console.log(await page.innerText("body"));
} finally {
  await browser.close();
  await closeAnonymizedProxy(local, true);
}

{
  "city": "Köln",
  "country": "DE",
  …