Bhaiya i did not understand how the flow of logic will u pleae explain how the call cal each other

#1

bhaiya i did not understand how the flow of logic will u pleae explain how the call cal each other

#2

@Aditya-Kushwaha-914550392281281 can you please specify in which part are you having problem with so that I can clear your doubt.

#3

bhaiya at time stamp 1.08 from there how calls are execute

#4

@Aditya-Kushwaha-914550392281281 didn’t get it, at timestamp 1:08, bhaiya didn’t even start coding.

#5

my bad its 1hr 08 minutes from that time bhaiya explaining some logic will u please explain

#6

@Aditya-Kushwaha-914550392281281 are you talking about the lib1 and lib2 require flow, or the working, non working flow part?

#7

@Aditya-Kushwaha-914550392281281 let me explain the lib1 and lib2 part

const lib1 = require('./lib1.js')
const lib2 = require('./lib2.js') 

console.log(lib1)
console.log(lib2)

console.log(lib1.lib2)
console.log(lib2.lib1)

as you already know js is an interpreted language, i.e. it goes line by line so when first line gets interpreted lib1.js is required/imported and in lib1.js we are requiring lib2.js and again in lib2.js we are requiring lib1.js. As, you can see it is a deadlock situation or infinite importing process, so to deal with it what nodejs developers have done is that, when a file that is partially imported is imported again it returns null.

  • first main file require lib1 and
  • lib1 imports lib2, everything works fine till here
  • then in lib2 when we require lib1 which is already required in main (as per node internals, it returns null object)
  • now lib2 returns { b: 20, lib1: {} }
  • then lib1 returns { a: 10, lib2: { b: 20, lib1: {} } back to the main

Then second line of main gets executed i.e.

const lib2 = require('./lib2.js')
  • again main requires lib2
  • and gets { b: 20, lib1: {} }

I hope this clears your doubt regarding the flow.

#8

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