With notes ： Reunderstanding else if

Recently I came to Zhengzhou to look for a job , Looking for a job in between 《 You don't know Javascript Middle volume 》 When , See this knowledge point , Also let me know again .

1. Before recognition

   1. I always thought else if Itself is JavaScript The grammar of this language

   2. Like the following code

      		if(1){
              
      
              }else if(2){
              
      
              }else{
              
                  
              }
      

2. After meeting

   1. else if No JavaScript The standard grammar of this language , But the community friends invented their own writing method according to the standard grammar

   2. reason ：if perhaps else If there is only one line of statement behind , The curly brackets can be omitted ( This is not recommended ️ )

      1. Non abbreviated mode

         1.  		if (1) {
                        
            
                    } else {
                        
                        if (2) {
                        
            
                        }else{
                        
                            
                        }
                    }
            

I have too little experience , There are many things to learn ！ Every attempt is a harvest , come on. ！