Today we're going to learn about express js.
We can start using checking the official document of express js - https://expressjs.com/
We are going to use express mostly for 3 reasons
- Easy routing system
- Can use with many templating system
- Have a middleware framework
We can start with the routing. Before express we write a long code to create a server, but with express it's pretty easy. See the old code
Now we are going to write the same old code using express.
First we need to require express
then create an app constant using express()
Now we can write app.listen(3000) to listen 3000 port.
We can write the routes now. Like homepage -
Now our code is more readable and easy to add any route
So you like the introduction of express js ?
You can see the graphical version here
Originally it published on nerdjfpbblog. You can connect with me in twitter or linkedin !
You can read the old posts from this series (below)

Day 1 — Introduction - Learning Node JS In 30 Days [Mini series]
Muhammad Ali (Nerdjfpb) ・ Dec 4 '19

Day 2 - Install and Running Node on Window - Learning Node JS In 30 Days [Mini series]
Muhammad Ali (Nerdjfpb) ・ Dec 5 '19

Day 3 - JavaScript Engine - Learning Node JS In 30 Days [Mini series]
Muhammad Ali (Nerdjfpb) ・ Dec 6 '19

Day 4 - Window === Global ? - Learning Node JS In 30 Days [Mini series]
Muhammad Ali (Nerdjfpb) ・ Dec 7 '19

Day 5 - Function Declarations vs. Function Expressions - Learning Node JS In 30 Days [Mini series]
Muhammad Ali (Nerdjfpb) ・ Dec 8 '19

Day 6 - Require & Module - Learning Node JS In 30 Days [Mini series]
Muhammad Ali (Nerdjfpb) ・ Dec 9 '19

Day 7 - More Modules - Learning Node JS In 30 Days [Mini series]
Muhammad Ali (Nerdjfpb) ・ Dec 10 '19

Day 8 – Var vs Let vs Const -Learning Node JS In 30 Days [Mini series]
Muhammad Ali (Nerdjfpb) ・ Dec 11 '19

Day 9 – Mastering EventEmitter - Learning Node JS In 30 Days [Mini series]
Muhammad Ali (Nerdjfpb) ・ Dec 14 '19

Day 10 – Mastering EventEmitter - Learning Node JS In 30 Days [Mini series]
Muhammad Ali (Nerdjfpb) ・ Dec 14 '19

Day 11 – Creating and Deleting Folders - Learning Node JS In 30 Days [Mini series]
Muhammad Ali (Nerdjfpb) ・ Dec 15 '19

Day 12 – Creating own server - Learning Node JS In 30 Days [Mini series]
Muhammad Ali (Nerdjfpb) ・ Dec 15 '19

Day 13 – Buffer & Stream - Learning Node JS In 30 Days [Mini series]
Muhammad Ali (Nerdjfpb) ・ Dec 16 '19

Day 14 – Serving HTML Pages - Learning Node JS In 30 Days [Mini series]
Muhammad Ali (Nerdjfpb) ・ Dec 17 '19

Day 15 – Sending JSON to Client - Learning Node JS In 30 Days [Mini series]
Muhammad Ali (Nerdjfpb) ・ Dec 18 '19

Day 16 – Routing (Basic) - Learning Node JS In 30 Days [Mini series]
Muhammad Ali (Nerdjfpb) ・ Dec 19 '19

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