How to insert a page break in HTML so wkhtmltopdf parses it?

Specify a CSS rule specific to the print media type. There are a number of properties that can be used for paging. I find it easiest to attach the page-break-before property to a class, as shown below.

In the HTML:

<p>Page 1, paragraph 1</p>
<p class="new-page">Page 2, paragraph 1</p>
<p>Page 2, paragraph 2</p>

In the CSS:

@media print {
  .new-page {
    page-break-before: always;
  }
}