Differences between 

CLIENT SIDE  & 

SERVER SIDE JavaScript


You want your web pages to be more interactive? 


YOU HAVE 2 WAYS  

which are often used together because 

THEY DO VERY DIFFERENT THINGS


SCRIPTS


A script = set of instructions


When referring to Web pages 
we have instructions:


  • to the Web browser - CLIENT SIDE scripting
  • to the server - SERVER SIDE scripting

CLIENT SIDE Scripting 


CLIENT =the system on which the Web browser is running 

JavaScript is by far, the main client side scripting language of the Web 

(there are other like ActionScript, DART, VBScript)


Client side scripts  are interpreted by the browser are executed on the local computer after the web page is loaded 


HOW?

  • The user requests a web page from the server
  • The server finds the page and sends it to the user 
  • The page is displayed on the browser while scripts are running during or after it was displayed
  • When downloading a page in your browser the dynamic behavior is already part of the web page in question
  • When you interact with the page the script executes 

CLIENT SIDE Scripting is used to CHANGE Web pages 
AFTER THEY ARE PLACED IN THE BROWSER 

(eg: online form -phone no. / online store - total changes)


SERVER SIDE Scripting 

SERVER = a place where the web page & other content live 

The SERVER sends a web page to the user, BY REQUEST


HOW? 

  • you request a page from  a server  
  • the script on the page is interpreted by the server / changing the page content so that it suits the user 
  • the page in its final form is sent to the user (eg. sign into bank account)



SERVER SIDE Scripting is used for the users that have individual accounts and  provides data from a DATABASE


SERVER SIDE Scripting allows a powerful level of 

PRIVACY   |   PROVISION  |  INFORMATION

(well suited for e-commerce or social sites)


Main technologies for SERVER SIDE Scripting:

Node.js     PHP       ASP.net   

 

GOOD TO KNOW: 

  • server side scripts are never seen by the user
  •  they run on the server which generates result and only after are sent to the user
  • although running all these scripts puts pressure on the server, the user' s system is not affected

IN CONCLUSION 

CLIENT SIDE deals with: 

  • making pages interactive
  • displays data in different ways

    SERVER SIDE deals with:

    • logging in
    • personal information
    • provides data which the user needs
    • allows you to store new data
          

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