I have excel cells that contain strings. I would like to format (e.g. bold) only part of the string using Office Scripts.

For example, a cell of which the content is like this:

Cell content

I want to change its format to this:

Cell content

Copilot gave the following answer but it won’t work because setBold only accepts one argument.

cellRange.getFormat().getFont().setBold(true, { start: 0, end: 3 })