But you can use snapping with vertex option enabled. For single vertex it will be the same. Or you can use this addon if you want “maya-like” visual style https://github.com/Stromberg90/Scripts/tree/master/Blender
It tries to mimic maya target weld tool, but only works for single vertex too. Hold left mouse button and drag to weld and right mouse button to exit the tool.
Thanks to this guy.
https://twitter.com/Stromberg90/status/1097278071709843456