Make it simple and direct to set icon like so

[twMat]

This would much simplify setting a tiddlers icon:

Currently, the icon field expects a tiddler title because this is then transcluded to show the content. It would be a lot simpler if the user could just directly add anything in the icon field (e.g an emoji symbol) and have this show as an icon - i.e IF it is a tiddler title then it is, still, transcluded, but anything else is shown as-is.

Currently $:/core/ui/TiddlerIcon reads:

\whitespace trim
<$let tiddlerIcon={{{ [<currentTiddler>] :cascade[all[shadows+tiddlers]tag[$:/tags/TiddlerIconFilter]!is[draft]get[text]] }}}>
<$list filter="[<tiddlerIcon>!is[blank]]" variable="ignore">
<$transclude tiddler=<<tiddlerIcon>>/>
</$list>
</$let>

I would like for !is[blank] it to instead be has[title] and add emptyMessage=<<tiddlerIcon>>:

\whitespace trim
<$let tiddlerIcon={{{ [<currentTiddler>] :cascade[all[shadows+tiddlers]tag[$:/tags/TiddlerIconFilter]!is[draft]get[text]] }}}>
<$list filter="[<tiddlerIcon>has[title]]" variable="ignore" emptyMessage=<<tiddlerIcon>> >
<$transclude tiddler=<<tiddlerIcon>>/>
</$list>
</$let>

(has[title] captures both shadows and non-shadows)

What you think about this for core?

[Leilei332]

I think we can let the tiddler use the text in the icon field as icon when the field only has one character (and the tiddler which has the same title doesn't exist).

I think it is more useful to create a new icon cascade for it, which is more compat than the original one.

Currently the tiddlywiki edition which is published by TidGi supports using emoji as tiddler icon.

[twMat]

when the field only has one character

Ah, that's a neat idea!

new icon cascade for it, which is more compat than the original one.

How would that be?

[Leilei332]

I think a new icon cascade can be created which works like the color cascade, like this (apply 💡 as icon to tiddler tagged idea):

[tag[idea]then[💡]]