Understand binding as a reference
Note: You should know the fact that Handsontable initialize source data for the table using a reference, but you shouldn't rely on it. For example, you shouldn't change values in source data using the reference to input dataset. Some mechanisms for handling data aren't prepared for changes from the outside, done in this way.If you have to avoid that, copy the data before you pass it to the grid. To change the data from outside Handsontable you can use our API methods, f.e. a change being made will be displayed immediately on the screen after calling setDataAtCell method.
Working with copy of data
In case you want to keep a separate working copy of data for Handsontable, it is suggested
to clone the data source before loading it into Handsontable. This can be done with
JSON.parse(JSON.stringify(data)) or another deep-cloning function.