jquery source's position in html file is important or not

Question

This is an example of click button to pop up an alert.

Answer 1

Fact is that, only html elements will be rendered quickly & shown to you before performing script operation, and it looks like page is loading faster,

also javascript is interpreted not compiled by design, so it will be executed line-by-line, so if you are asking for some jquery function and they are not interpreted already then browser will throw error, that's why we need to add jquery in first line.

try running

  
    
 HTML Element

     

  

vs

    
        
    
    
        
 HTML Element
    

OR have a look on this first

Script executed at top

and then

Script executed at last

it will clear your concept.

also for your reference please have a look on this