My approach / what I've found so far:
I want to insert an icon as the value attribute for an input tag as follows:
<input class="icon-" value="󮤂" />
<!--the class is used to assign the icon font-->
󮤂 is codepoint
U+EE902, which is not assigned in Unicode.
\e902 is codepoint
), which is a private-use codepoint.
The two are completely different codepoints.