Emojis/Non-latin glyphs

I am trying to display Emojis, and the Tribar character (U+2261, ≡) for a project that uses imgui-js.
In traditional C++ Dear ImGui, that's how you would load a font using a custom glyph range: https://github.com/ocornut/imgui/blob/master/docs/FONTS.md#using-custom-glyph-ranges

How would I go on about doing that in imgui-js ?