roman01la/image.svg

## image.svg

      
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              image.svg
            
          
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## index.html
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Inline SVG &lt;img&gt; with ServiceWorker</title>
</head>
<body>

  <img src="image.svg">

  <script>
    if ('serviceWorker' in navigator) {
      navigator.serviceWorker.register('service_worker.js');
    } else {
      console.error('ServiceWorker is not supported in this browser!');
    }
  </script>

</body>
</html>

## service_worker.js
self.addEventListener('fetch', (event) => {

  if (event.request.url.includes('index.html')) {

    event.respondWith(
      // fetch HTML
      fetch('index.html')
        .then((res) => res.text())
        .then((html) => {

          // fetch SVG
          return fetch('image.svg')
            .then((res) => res.text())
            // replace <img> with SVG contents
            .then((svg) => html.replace('<img src="image.svg">', svg))
            // respond with a new HTML
            .then((html) => new Response(html, {
              headers: new Headers({
                'Content-Type': 'text/html'
              })
            }));
        }));
  }
});
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<title>Inline SVG <img> with ServiceWorker</title>
	</head>
	<body>

	<img src="image.svg">

	<script>
	if ('serviceWorker' in navigator) {
	navigator.serviceWorker.register('service_worker.js');
	} else {
	console.error('ServiceWorker is not supported in this browser!');
	}
	</script>

	</body>
	</html>
	self.addEventListener('fetch', (event) => {

	if (event.request.url.includes('index.html')) {

	event.respondWith(
	// fetch HTML
	fetch('index.html')
	.then((res) => res.text())
	.then((html) => {

	// fetch SVG
	return fetch('image.svg')
	.then((res) => res.text())
	// replace <img> with SVG contents
	.then((svg) => html.replace('<img src="image.svg">', svg))
	// respond with a new HTML
	.then((html) => new Response(html, {
	headers: new Headers({
	'Content-Type': 'text/html'
	})
	}));
	}));
	}
	});