スキャンするだけでWi-Fiに自動接続。

import QRCodeStyling from 'qr-code-styling';

// Initialize customized QR code
const qrCode = new QRCodeStyling({
  width: 300,
  height: 300,
  data: 'https://onlineqrgenerator.com',
  dotsOptions: { color: '#171717', type: 'rounded' },
  backgroundOptions: { color: '#ffffff' },
  image: '/logo.png'
});

qrCode.append(document.getElementById('qr-holder'));

import requests

// Post parameters to generate PNG
url = 'https://api.onlineqrgenerator.com/v1/create'
payload = {
    'data': 'https://onlineqrgenerator.com',
    'size': 300,
    'color': '#171717',
    'bg_color': '#ffffff'
}
response = requests.post(url, json=payload)
with open('qr.png', 'wb') as f:
    f.write(response.content)

curl -X POST https://api.onlineqrgenerator.com/v1/create \
  -H 'Content-Type: application/json' \
  -d '{
    "data": "https://onlineqrgenerator.com",
    "size": 300,
    "color": "#171717",
    "bg_color": "#ffffff"
  }' \
  --output qr.png

package main

import (
	'bytes'
	'encoding/json'
	'io'
	'net/http'
	'os'
)

func main() {
	payload, _ := json.Marshal(map[string]interface{}{
		'data': 'https://onlineqrgenerator.com',
		'size': 300,
	})
	resp, _ := http.Post('https://api.onlineqrgenerator.com/v1/create', 'application/json', bytes.NewBuffer(payload))
	defer resp.Body.Close()
	out, _ := os.Create('qr.png')
	defer out.Close()
	io.Copy(out, resp.Body)
}