Multiple color/bump/metalness maps on one object

Hi all.

I’m a total noob with three.js (or 3D in general) but I have a question regarding texture.

I have a project where I need multiple textures (of the same type ) combined in one. For example I need to combine two or three “color” maps on the same surface. Or combine multiple bump maps and “add” them together.

While in blender I can use multiple color maps or bump maps with a “mix” node I wonder if any such thing is available for three.js ?