https://lynxjs.org/api/elements/built-in/text.html#setTextSelection

This method sets the selected text based on start and end positions and controls the visibility of selection handles. The response res contains:

data Action = SetText | TextSet | SetTextError MisoString

update :: Action -> Effect model Action
update SetText = setTextSelection "someImageId" SetText SetTextError
update TextSet = io_ (consoleLog "text was set")
update (SetTextError e) = io_ (consoleLog e)

https://lynxjs.org/api/elements/built-in/text.html#gettextboundingrect

This method retrieves the bounding box of a specific range of text.

data Action = RectReceived Rect | GetRect | GotError MisoString

update :: Action -> Effect model Action
update GetRect = getTextBoundingRect "#box" defaultGetTextBoundingRect RectReceived GotError
update (RectReceived rect) = io_ $ consoleLog ("got rect")
update (GotError errMsg) = io_ (consoleLog errMsg)

https://lynxjs.org/api/elements/built-in/text.html#getselectedtext

This method retrieves the string content of the currently selected text.

data Action = TextReceived MisoString | GetText | GotError MisoString

update :: Action -> Effect model Action
update GetText = getSelectedText "#box" TextReceived GotError
update (TextReceived txt) = io_ (consoleLog ("got text: " <> txt))
update (GotError errMsg) = io_ (consoleLog errMsg)