What custom instruction?
The registration method of instructions and filters, components are the same,
they are divided into global registration and local registration
1. Global registration
Vue.directive('name',{
})
2. Partial registration
directive:{
name:''
}
Then use it directly in the module
Vue also provides hook functions for several custom instructions
bind: Called when the instruction is bound to the element for the first time, and only executed once.
inserted: The bound element is called when it is inserted into the DOM of the parent node.
update: called when the component is updated.
componentUpdated: called when components and subcomponents are updated.
unbind: Called when the instruction is unbound from the element, only executed once.