I need a view on the webpage that can resolve conflicts

[Xiangzi529]

I need a view on the webpage that can resolve conflicts, which is the merge function. I don't know if it's a three-way merge component. I didn't find the corresponding method in the document to merge conflicts. The desired effect is shown in the following picture. Can this effect be achieved?

[Xiangzi529]

I thought this was a three way merge before, but after checking the document, it seems to be called a merge editor. How to use this merge editor and where can I introduce it