Prevent undo of initial value, do not add initial value to history

[achimmihca]

I try to prevent undo of the initial value.
I found some CodeMirror 6 related threads about this.

• https://discuss.codemirror.net/t/disable-ctrl-z-undo-for-the-very-first-change/4202
• https://discuss.codemirror.net/t/how-do-i-use-isolatehistory/4944
• https://stackoverflow.com/questions/72754532/how-to-clear-undo-history-in-codemirror-6

But I am unsure how to apply these approaches when using this Angular wrapper.

What I would like to do is to set the initial value with Transaction.addToHistory.of(false).
But my code is too late because the setValue method of this Angular wrapper has already made an initial change.

How can I prevent the initial value from showing up in the undo/redo history when using this Angular wrapper?

Thanks for the help

[nzbin]

You can try the following method first. I will improve this issue in the near future.

<code-editor #editor />

editor.view?.dispatch({
  changes: { from: 0, to: editor.view.state.doc.length, insert: editor.view.state.doc },
  annotations: Transaction.addToHistory.of(false),
});

[achimmihca]

Thank you, this works for me.

I already stumbled upon this solution before, but I was confused by our Angular app because the initial value that I expected is loaded async in my case.
Using above snippet when the initial value is present works.

From my side this can be closed.

[nzbin]

The new version has been improved.