Let's say this is my website:
* {
font-family: Papyrus, nothing;
font-size: 30px;
line-height: 100%;
}
Qui legit haec est mirabilis ❤
Now, the ❤ is not written in Papyrus, because it's no glyph of this font. I would like to generally hide all glyphs that do not exist in the font file. Taking the notdef glyph of the font file instead would be also fine. I want to use it for an editable text area later. So doing it manually doesn't help me.
How is it possible to do that?