How does Vue2 listen for array changes

• Reverse Sort Splice Push Pop Unshift Reverse Sort Splice Push Pop Unshift
• Manually trigger Notify to update the view
• Data Hijack (Observearray) for data added by the three Splice Unshif Push methods
• If the data in the array is a reference data type, recursive hijacking of the data in the array continues

To sum up, there are two things:

• Changing Array Prototypes
• Perform data observations for each item in the array and manually trigger notify to update the view