Execute npm i && npm run build and look at the two generated html files.
Expected result for both files (look at the quotes inside the script tags):
<!DOCTYPE html>
<html>
<head>
<meta name="description" content="This page contains schema.org information">
<script type="application/ld+json">
{
"name": "This is a \"cool\" webpage",
"key": "bla 'blub' bla"
}
</script>
<script>
var str = 'This is the \'best\' string';
</script>
</head>
<body></body>
</html>But the result for ?interpolate is:
<!DOCTYPE html>
<html>
<head>
<meta name="description" content="This page contains schema.org information">
<script type="application/ld+json">
{
"name": "This is a "cool" webpage",
"key": "bla 'blub' bla"
}
</script>
<script>
var str = 'This is the 'best' string';
</script>
</head>
<body></body>
</html>