transparent-pixel

One transparent pixel

Serve a transparent pixel with express.js:

const express = require('express');
const pixel = require('transparent-pixel');
 
const app = express();
 
app.get('/pixel/:metric', (request, response) => {
    report(request.params.metric); // your own logic
 
    response
        .status(201)
        .type('gif')
        .send(pixel);
});