JSFiddle - React, Tailwind, and code Playground

HTML

<canvas id="myCanvas"></canvas>

JavaScript

// Récupérer le contexte du canvas:
var canvas = document.getElementById('myCanvas'),
    context = canvas.getContext('2d');

// Dessiner sur le canvas:
context.fillStyle = '#666666';
for (var i = 0; i < 10000; i++)
  context.fillRect(
    Math.floor(Math.random() * canvas.width),
    Math.floor(Math.random() * canvas.height),
    1,
    1
  );