Set the subject title and body content of an email using mailto:

mailto is a hypertext transfer protocol and its address uses URI scheme. Therefore, its format is the same as the URL of HTTP, such as

<a href=";body=Hi,Markbuild%0D%0A%0D%0A{content}%0D%0A%0D%0AThank you">Test</a>

encodeURI('\r\n') // Output '%0D%0A' is the escape sequence for a line break.