Custom HTML Tags
mPDF uses a number of custom HTML tags (see HTML Control Tags - Overview).
In addition to those, the custom tags <ttz> <tts> and <tta> are reserved for use internally within the mPDF program to denote the core symbol, dingbat and arial characters.
(mPDF >= 2.2)
If you want to hide mPDF custom tags from a browser, enclose any mPDF code within:
As these are the standard comment tags recognised by every browser, this will create valid HTML which should output correctly in any circumstances. mPDF will strip away the $<!–mpdf tag and any following spaces, and the $mpdf–> tag and any preceeding spaces, and process all enclosed code.
Most browsers will ignore (self-closing) tags that are not recognised, but <htmlpageheader> and <htmlpagefooter> are different, as they contain innerHTML e.g.
The enclosed innerHTML will be output by a browser, so you need to hide it; either use the special comment tags as above, or an alternative is to use CSS, e.g. add to your stylesheet
Yet another way is to use in-line CSS: