how to only show different part?

[LoRexxar]

just like

[chenyahui]

just like

You can filter out the DiffEqual items of item before pass the diffs to DiffPrettyHtml or DiffPrettyText.
just like this:

	var newDiffs []diffmatchpatch.Diff
	for _, item := range diffs {
		if item.Type != diffmatchpatch.DiffEqual {
			newDiffs = append(newDiffs, item)
		}
	}

[LoRexxar]

I think it’s best to select the display content by adding parameters, this can only be a temporary solution