Thirty What are VM and VC?

（1） What is? vm？ What is? vc？

• VueComponent Instance object of , It will be abbreviated as vc（ It can also be called ： Component instance object ）.
• Vue Instance object of , It will be abbreviated as vm.

（2）VueComponent What is the essence of components ？

• school The essence of a component is a component called VueComponent Constructor for , And not defined by programmers , yes Vue.extend Generated .
• We just need to write or ,Vue When parsing, it will help us create school Component instance objects , namely Vue Help us execute ：new VueComponent(options).
• Particular attention ： Every time you call Vue.extend, What is returned is a brand new VueComponent！！！！

（3） About this Point to ：

• vc In component configuration ：data function 、methods The function in 、watch The function in 、computed The function in Their this It's all 【VueComponent Instance object 】.
• new Vue(options) namely vm Configuration in progress ：data function 、methods The function in 、watch The function in 、computed The function in Their this It's all 【Vue Instance object 】.

source ： Shang Silicon Valley teacher Zhang Tianyu video , Talking about vm and vc An important built-in relationship of .