(Disassemble the Vue core modules one by one, write the underlying source code, refuse to talk on paper, and give you your own Vue framework! This set of tutorials will take you to understand the bottom of handwriting responsive data system, handwriting template compilation system, handwriting virtual Dom and diff algorithm In one step, it is easy to understand, illustrated and simple. It is demonstrated with rich illustrations and examples, focusing on the programming ideas, so that you can really improve the programming background and reach the medium and high-level front-end standards. The tutorial takes into account vue2 0 and 3.0, focusing on the underlying differences between the two, trying to make everyone understand each core mechanism.)