webHTML/cssFilters.html at main · error420notfound/webHTML · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>CSS filter comparison</title>
<style>
  body {
    background: #111;
    color: #eee;
    font-family: monospace;
    padding: 40px;
  }

  h2 {
    margin-bottom: 30px;
  }

  .section {
    margin-bottom: 50px;
  }

  .row {
    display: flex;
    gap: 24px;
    align-items: center;
  }

  .block {
    text-align: center;
  }

  img {
    width: 160px;
    height: 160px;
    border: 1px solid #444;
    display: block;
  }

  .label {
    margin-top: 8px;
    font-size: 12px;
    color: #aaa;
  }
</style>
</head>
<body>

<h2>CSS filter comparison</h2>

<div id="container"></div>

<script>
// ---------- base image (high contrast, high saturation) ----------
const size = 64;
const canvasSrc = document.createElement('canvas');
canvasSrc.width = size;
canvasSrc.height = size;
const ctx = canvasSrc.getContext('2d');

// gradient + stripes + color variation
for (let y = 0; y < size; y++) {
  for (let x = 0; x < size; x++) {

    const r = Math.floor((x / size) * 255);
    const g = Math.floor((y / size) * 255);
    const b = (x % 8 < 4) ? 255 : 0; // hard stripe for contrast

    ctx.fillStyle = `rgb(${r}, ${g}, ${b})`;
    ctx.fillRect(x, y, 1, 1);
  }
}

const dataURL = canvasSrc.toDataURL();

// ---------- filter definitions ----------
const filters = [
  { name: 'blur', values: ['0px', '2px', '4px', '6px', '8px'] },
  { name: 'brightness', values: ['0%', '50%', '100%', '150%', '200%'] },
  { name: 'contrast', values: ['0%', '50%', '100%', '150%', '200%'] },
  { name: 'opacity', values: ['0%', '50%', '100%', '150%', '200%'] },
  { name: 'saturate', values: ['0%', '50%', '100%', '150%', '200%'] }
];

const labels = ['0%', '50%', '100%', '150%', '200%'];

const container = document.getElementById('container');

// ---------- render ----------
filters.forEach(filter => {

  const section = document.createElement('div');
  section.className = 'section';

  const title = document.createElement('div');
  title.textContent = filter.name;
  title.style.marginBottom = '12px';
  section.appendChild(title);

  const row = document.createElement('div');
  row.className = 'row';

  filter.values.forEach((val, i) => {
    const block = document.createElement('div');
    block.className = 'block';

    const img = document.createElement('img');
    img.src = dataURL;

    img.style.filter = `${filter.name}(${val})`;

    const label = document.createElement('div');
    label.className = 'label';
    label.textContent = labels[i];

    block.appendChild(img);
    block.appendChild(label);
    row.appendChild(block);
  });

  section.appendChild(row);
  container.appendChild(section);
});
</script>

</body>
</html>