DidChangeDecorations events not working

[neoncom]

monaco-editor version: 0.11.1
Browser: chrome newest
OS: win 10 64 bit
Steps or JS usage snippet reproducing the issue:

editor.onDidChangeModelDecorations
or
editor.getModel().onDidChangeDecorations

both return an empty object ({}). tested in my project and in monaco editor playground

in 0.10.1 it worked perfectly

[alexdima]

The event sent out no longer lists the decorations that were changed. This has been done in order to improve the speed of decorations. See microsoft/vscode#36410

You can, on your side keep track of the ranges you set on decorations. Then, in the onDidChangeDecorations callback, you can read the ranges for the decorations from the editor and figure out if your decorations have been changed.