Implement methods in vue to call another method

vue is within the same component;

One method in methods calls another method in methods

Can be calledthis.$.test2();

this.$.test2();One method calls another method;

new Vue({ 
 el: '#app', 
 data: { 
  test:111, 
 }, 
 methods: { 
  test1:function(){ 
   alert() 
  }, 
  test2:function(){ 
   alert("this is test2") 
   alert() //Undefined pops up when the test3 is called  }, 
  test3:function(){ 
   this.$.test2();//Calling the method of test2 in test3  } 
 } 
}) 

Another method to call methods in the above vue article is the entire content shared by the editor. I hope it can give you a reference and I hope you can support me more.