Through this parameter used can specify a string template with one placeholder, which will be applied to the links to all external images in IMG elements, which will be present in the resultant HTML string. If NULL or empty, template will not be added, and pure filenames will be present in the resultant HTML markup. Is template is invalid, it will be treated as a prefix, so filenames will be concatenated to the its end.
externalCssTemplate
String
Through this parameter used can specify a string template with one placeholder, which will be added to the links to all external stylesheets in LINK elements, which will be present in the resultant HTML string. If NULL or empty, template will not be added, and pure filenames will be present in the resultant HTML markup. Is template is invalid, it will be treated as a prefix, so filenames will be concatenated to the its end.
Return Value
String, which contains the content of the HTML document with links, adjusted to the external resources