<div class="scratch-container">
  <div class="scratch-base">
    <h3>You Won!</h3>
    <div class="code">CODE2026</div>
  </div>
  <canvas id="scratchCanvas" width="300" height="150"></canvas>
</div>

.scratch-container {
  font-family: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  position: relative;
  width: 300px;
  height: 150px;
  margin: 0 auto;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}
.scratch-base {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #10b981, #059669);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: white;
  z-index: 1;
}
.scratch-base h3 {
  margin: 0 0 10px 0;
  font-size: 1.5rem;
}
.code {
  background: white;
  color: #333;
  padding: 5px 15px;
  border-radius: 4px;
  font-family: monospace;
  font-weight: 700;
  letter-spacing: 2px;
}
canvas {
  position: relative;
  z-index: 2;
  cursor: crosshair;
}

const canvas = document.getElementById("scratchCanvas");
const ctx = canvas.getContext("2d");
let isDrawing = false;

// Fill with gray overlay
ctx.fillStyle = "#9ca3af";
ctx.fillRect(0, 0, canvas.width, canvas.height);

// Add text instruction
ctx.fillStyle = "#ffffff";
ctx.font = "16px Arial";
ctx.fillText("Scratch Here!", 100, 80);

// Set blend mode to erase
ctx.globalCompositeOperation = "destination-out";

function scratch(x, y) {
  ctx.beginPath();
  ctx.arc(x, y, 15, 0, 2 * Math.PI);
  ctx.fill();
}

canvas.addEventListener("mousedown", () => isDrawing = true);
canvas.addEventListener("mouseup", () => isDrawing = false);
canvas.addEventListener("mousemove", (e) => {
  if (isDrawing) {
    const rect = canvas.getBoundingClientRect();
    scratch(e.clientX - rect.left, e.clientY - rect.top);
  }
});

// Touch support
canvas.addEventListener("touchstart", (e) => {
  isDrawing = true;
  e.preventDefault();
});
canvas.addEventListener("touchend", () => isDrawing = false);
canvas.addEventListener("touchmove", (e) => {
  if (isDrawing) {
    const rect = canvas.getBoundingClientRect();
    const touch = e.touches[0];
    scratch(touch.clientX - rect.left, touch.clientY - rect.top);
  }
});

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Scratch Card Reveal JS

Add a fun interactive element to your site with this scratch-off card. We use HTML5 Canvas to let users erase the top layer with their mouse or finger, revealing a promo code or secret message underneath.

264

#javascript

#css

#scratch card

#canvas

#gamification

#interactive

#reveal

#ui

/HTML *CSS ()JS Output Live Updates

const canvas = document.getElementById("scratchCanvas");
const ctx = canvas.getContext("2d");
let isDrawing = false;

// Fill with gray overlay
ctx.fillStyle = "#9ca3af";
ctx.fillRect(0, 0, canvas.width, canvas.height);

// Add text instruction
ctx.fillStyle = "#ffffff";
ctx.font = "16px Arial";
ctx.fillText("Scratch Here!", 100, 80);

// Set blend mode to erase
ctx.globalCompositeOperation = "destination-out";

function scratch(x, y) {
  ctx.beginPath();
  ctx.arc(x, y, 15, 0, 2 * Math.PI);
  ctx.fill();
}

canvas.addEventListener("mousedown", () => isDrawing = true);
canvas.addEventListener("mouseup", () => isDrawing = false);
canvas.addEventListener("mousemove", (e) => {
  if (isDrawing) {
    const rect = canvas.getBoundingClientRect();
    scratch(e.clientX - rect.left, e.clientY - rect.top);
  }
});

// Touch support
canvas.addEventListener("touchstart", (e) => {
  isDrawing = true;
  e.preventDefault();
});
canvas.addEventListener("touchend", () => isDrawing = false);
canvas.addEventListener("touchmove", (e) => {
  if (isDrawing) {
    const rect = canvas.getBoundingClientRect();
    const touch = e.touches[0];
    scratch(touch.clientX - rect.left, touch.clientY - rect.top);
  }
});