I can't find any native markdown
way to do this but you could run a little script across the generated HTML if you really feel you need to do this.
This is a simple Python 3 option that might get you started. This could be improved in many ways but wanted to keep it simple. An obvious idea would be to give it a folder and have it process every HTML file in the folder. But I hope this gives the idea.
Example code:
filepath = input('What is the full file path to the file? - ')
htmldoctype = ' '.join([
'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN"',
'"http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">',
'\n'
])
htmlinfo = ('<html xmlns="http://www.w3.org/1999/xhtml">\n')
inlines = []
try:
with open(filepath, mode='r', encoding='utf-8') as infile:
for line in infile:
if line.strip() == '<!DOCTYPE html>':
inlines.append(htmldoctype)
elif line.strip() == '<html>':
inlines.append(htmlinfo)
else:
inlines.append(line)
except Exception:
print('something went wrong in get')
try:
with open(filepath, mode='w', encoding='utf-8') as outfile:
for line in inlines:
outfile.write(line)
except Exception:
print('something went wrong in write')
Input:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>Test of markdown</title>
<link type="text/css" rel="stylesheet" href="../main.css"/>
</head>
<body>
test
</body>
</html>
Output:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8"/>
<title>Test of markdown</title>
<link type="text/css" rel="stylesheet" href="../main.css"/>
</head>
<body>
test
</body>
</html>