Comprehending import statements and someone's else old react code











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I was trying to comprehend Dimitar Valchanov React code for the game 2048 via his github repo.



He have also written a blog about it but he wants a person to go through the code himself and have rather explained the structure of the code in this blog. (*Although he have included the comments in the code to make it more understandable).



The major problem I am facing while to trying to understand his code is 1st my lack of experience and 2nd His code is old now



While reviewing his code, I found few things which I was unable to comprehend.



[Question:1] In his import statements in this file, He have used something like this



import {Board, Result} from "js/components";
import * as Actions from "js/actions/actions";


How is he able to right js and go back to the src and then walk through the given repo.



If I would've been, I would have written something like this
import Board from "../components";
import Result from "../components";



Question: What does 'js' mean over here and how is he able to export two different file using single statement i.e import {Board, Result} from "js/components";



[Question:2] In the same file he have written something like this



this.actions = bindActionCreators(Actions, this.props.dispatch);


Which I thought to be dispatching all redux action together but I seem to be wrong and hence I am unable to comprehend what is inside my this.actions



And hence this line also doesn't make sense



 getChildContext() {
return {
actions: this.actions
};
}


Question: Can Someone please explain me what's happening above?










share|improve this question


















  • 1




    Good place to start for #1 stackoverflow.com/a/36796281/1175966 . The "js/" is just a directory path
    – charlietfl
    Nov 19 at 23:43












  • @charlietfl There is no directory with name js I went through that article but still couldn't figure out how did he used the word js here
    – KuchBhi
    Nov 20 at 7:43















up vote
2
down vote

favorite












I was trying to comprehend Dimitar Valchanov React code for the game 2048 via his github repo.



He have also written a blog about it but he wants a person to go through the code himself and have rather explained the structure of the code in this blog. (*Although he have included the comments in the code to make it more understandable).



The major problem I am facing while to trying to understand his code is 1st my lack of experience and 2nd His code is old now



While reviewing his code, I found few things which I was unable to comprehend.



[Question:1] In his import statements in this file, He have used something like this



import {Board, Result} from "js/components";
import * as Actions from "js/actions/actions";


How is he able to right js and go back to the src and then walk through the given repo.



If I would've been, I would have written something like this
import Board from "../components";
import Result from "../components";



Question: What does 'js' mean over here and how is he able to export two different file using single statement i.e import {Board, Result} from "js/components";



[Question:2] In the same file he have written something like this



this.actions = bindActionCreators(Actions, this.props.dispatch);


Which I thought to be dispatching all redux action together but I seem to be wrong and hence I am unable to comprehend what is inside my this.actions



And hence this line also doesn't make sense



 getChildContext() {
return {
actions: this.actions
};
}


Question: Can Someone please explain me what's happening above?










share|improve this question


















  • 1




    Good place to start for #1 stackoverflow.com/a/36796281/1175966 . The "js/" is just a directory path
    – charlietfl
    Nov 19 at 23:43












  • @charlietfl There is no directory with name js I went through that article but still couldn't figure out how did he used the word js here
    – KuchBhi
    Nov 20 at 7:43













up vote
2
down vote

favorite









up vote
2
down vote

favorite











I was trying to comprehend Dimitar Valchanov React code for the game 2048 via his github repo.



He have also written a blog about it but he wants a person to go through the code himself and have rather explained the structure of the code in this blog. (*Although he have included the comments in the code to make it more understandable).



The major problem I am facing while to trying to understand his code is 1st my lack of experience and 2nd His code is old now



While reviewing his code, I found few things which I was unable to comprehend.



[Question:1] In his import statements in this file, He have used something like this



import {Board, Result} from "js/components";
import * as Actions from "js/actions/actions";


How is he able to right js and go back to the src and then walk through the given repo.



If I would've been, I would have written something like this
import Board from "../components";
import Result from "../components";



Question: What does 'js' mean over here and how is he able to export two different file using single statement i.e import {Board, Result} from "js/components";



[Question:2] In the same file he have written something like this



this.actions = bindActionCreators(Actions, this.props.dispatch);


Which I thought to be dispatching all redux action together but I seem to be wrong and hence I am unable to comprehend what is inside my this.actions



And hence this line also doesn't make sense



 getChildContext() {
return {
actions: this.actions
};
}


Question: Can Someone please explain me what's happening above?










share|improve this question













I was trying to comprehend Dimitar Valchanov React code for the game 2048 via his github repo.



He have also written a blog about it but he wants a person to go through the code himself and have rather explained the structure of the code in this blog. (*Although he have included the comments in the code to make it more understandable).



The major problem I am facing while to trying to understand his code is 1st my lack of experience and 2nd His code is old now



While reviewing his code, I found few things which I was unable to comprehend.



[Question:1] In his import statements in this file, He have used something like this



import {Board, Result} from "js/components";
import * as Actions from "js/actions/actions";


How is he able to right js and go back to the src and then walk through the given repo.



If I would've been, I would have written something like this
import Board from "../components";
import Result from "../components";



Question: What does 'js' mean over here and how is he able to export two different file using single statement i.e import {Board, Result} from "js/components";



[Question:2] In the same file he have written something like this



this.actions = bindActionCreators(Actions, this.props.dispatch);


Which I thought to be dispatching all redux action together but I seem to be wrong and hence I am unable to comprehend what is inside my this.actions



And hence this line also doesn't make sense



 getChildContext() {
return {
actions: this.actions
};
}


Question: Can Someone please explain me what's happening above?







javascript reactjs redux






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asked Nov 19 at 23:33









KuchBhi

707220




707220








  • 1




    Good place to start for #1 stackoverflow.com/a/36796281/1175966 . The "js/" is just a directory path
    – charlietfl
    Nov 19 at 23:43












  • @charlietfl There is no directory with name js I went through that article but still couldn't figure out how did he used the word js here
    – KuchBhi
    Nov 20 at 7:43














  • 1




    Good place to start for #1 stackoverflow.com/a/36796281/1175966 . The "js/" is just a directory path
    – charlietfl
    Nov 19 at 23:43












  • @charlietfl There is no directory with name js I went through that article but still couldn't figure out how did he used the word js here
    – KuchBhi
    Nov 20 at 7:43








1




1




Good place to start for #1 stackoverflow.com/a/36796281/1175966 . The "js/" is just a directory path
– charlietfl
Nov 19 at 23:43






Good place to start for #1 stackoverflow.com/a/36796281/1175966 . The "js/" is just a directory path
– charlietfl
Nov 19 at 23:43














@charlietfl There is no directory with name js I went through that article but still couldn't figure out how did he used the word js here
– KuchBhi
Nov 20 at 7:43




@charlietfl There is no directory with name js I went through that article but still couldn't figure out how did he used the word js here
– KuchBhi
Nov 20 at 7:43












1 Answer
1






active

oldest

votes

















up vote
0
down vote













Question #1:



The import statement is not old syntax or deprecated. Its simply another way of importing code from an ES6 module.



import {Board, Result} from "js/components";


and



import Board from "../components/Board";
import Result from "../components/Result";


are both perfectly valid ways of importing code. Its up to you how you want to do it.



Here is a link that explains Named Exports vs Default Exports.



The js/components is just a directory path that points to his file here



Question #2:



Whats inside this.actions is many functions wrapped in dispatch(...) ready to be dispatched to Redux to perform actions on the store upon being called.



In the following method



getChildContext() {
return {
actions: this.actions
};
}


it just returns this.actions, basically.



This code is not old and still used on the Redux site when explaining the bindActionCreators method.






share|improve this answer





















  • Thanks for answering There is no directory with name js I went through that article but still couldn't figure out how did he used the word js here
    – KuchBhi
    Nov 20 at 7:43










  • I'm not sure either, but if you were wanting to replicate this program and it gives you an error that it cant find "js/components" then you can just replace it with "../../components"
    – Shawn Andrews
    Nov 20 at 18:23











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1 Answer
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Question #1:



The import statement is not old syntax or deprecated. Its simply another way of importing code from an ES6 module.



import {Board, Result} from "js/components";


and



import Board from "../components/Board";
import Result from "../components/Result";


are both perfectly valid ways of importing code. Its up to you how you want to do it.



Here is a link that explains Named Exports vs Default Exports.



The js/components is just a directory path that points to his file here



Question #2:



Whats inside this.actions is many functions wrapped in dispatch(...) ready to be dispatched to Redux to perform actions on the store upon being called.



In the following method



getChildContext() {
return {
actions: this.actions
};
}


it just returns this.actions, basically.



This code is not old and still used on the Redux site when explaining the bindActionCreators method.






share|improve this answer





















  • Thanks for answering There is no directory with name js I went through that article but still couldn't figure out how did he used the word js here
    – KuchBhi
    Nov 20 at 7:43










  • I'm not sure either, but if you were wanting to replicate this program and it gives you an error that it cant find "js/components" then you can just replace it with "../../components"
    – Shawn Andrews
    Nov 20 at 18:23















up vote
0
down vote













Question #1:



The import statement is not old syntax or deprecated. Its simply another way of importing code from an ES6 module.



import {Board, Result} from "js/components";


and



import Board from "../components/Board";
import Result from "../components/Result";


are both perfectly valid ways of importing code. Its up to you how you want to do it.



Here is a link that explains Named Exports vs Default Exports.



The js/components is just a directory path that points to his file here



Question #2:



Whats inside this.actions is many functions wrapped in dispatch(...) ready to be dispatched to Redux to perform actions on the store upon being called.



In the following method



getChildContext() {
return {
actions: this.actions
};
}


it just returns this.actions, basically.



This code is not old and still used on the Redux site when explaining the bindActionCreators method.






share|improve this answer





















  • Thanks for answering There is no directory with name js I went through that article but still couldn't figure out how did he used the word js here
    – KuchBhi
    Nov 20 at 7:43










  • I'm not sure either, but if you were wanting to replicate this program and it gives you an error that it cant find "js/components" then you can just replace it with "../../components"
    – Shawn Andrews
    Nov 20 at 18:23













up vote
0
down vote










up vote
0
down vote









Question #1:



The import statement is not old syntax or deprecated. Its simply another way of importing code from an ES6 module.



import {Board, Result} from "js/components";


and



import Board from "../components/Board";
import Result from "../components/Result";


are both perfectly valid ways of importing code. Its up to you how you want to do it.



Here is a link that explains Named Exports vs Default Exports.



The js/components is just a directory path that points to his file here



Question #2:



Whats inside this.actions is many functions wrapped in dispatch(...) ready to be dispatched to Redux to perform actions on the store upon being called.



In the following method



getChildContext() {
return {
actions: this.actions
};
}


it just returns this.actions, basically.



This code is not old and still used on the Redux site when explaining the bindActionCreators method.






share|improve this answer












Question #1:



The import statement is not old syntax or deprecated. Its simply another way of importing code from an ES6 module.



import {Board, Result} from "js/components";


and



import Board from "../components/Board";
import Result from "../components/Result";


are both perfectly valid ways of importing code. Its up to you how you want to do it.



Here is a link that explains Named Exports vs Default Exports.



The js/components is just a directory path that points to his file here



Question #2:



Whats inside this.actions is many functions wrapped in dispatch(...) ready to be dispatched to Redux to perform actions on the store upon being called.



In the following method



getChildContext() {
return {
actions: this.actions
};
}


it just returns this.actions, basically.



This code is not old and still used on the Redux site when explaining the bindActionCreators method.







share|improve this answer












share|improve this answer



share|improve this answer










answered Nov 20 at 0:18









Shawn Andrews

930416




930416












  • Thanks for answering There is no directory with name js I went through that article but still couldn't figure out how did he used the word js here
    – KuchBhi
    Nov 20 at 7:43










  • I'm not sure either, but if you were wanting to replicate this program and it gives you an error that it cant find "js/components" then you can just replace it with "../../components"
    – Shawn Andrews
    Nov 20 at 18:23


















  • Thanks for answering There is no directory with name js I went through that article but still couldn't figure out how did he used the word js here
    – KuchBhi
    Nov 20 at 7:43










  • I'm not sure either, but if you were wanting to replicate this program and it gives you an error that it cant find "js/components" then you can just replace it with "../../components"
    – Shawn Andrews
    Nov 20 at 18:23
















Thanks for answering There is no directory with name js I went through that article but still couldn't figure out how did he used the word js here
– KuchBhi
Nov 20 at 7:43




Thanks for answering There is no directory with name js I went through that article but still couldn't figure out how did he used the word js here
– KuchBhi
Nov 20 at 7:43












I'm not sure either, but if you were wanting to replicate this program and it gives you an error that it cant find "js/components" then you can just replace it with "../../components"
– Shawn Andrews
Nov 20 at 18:23




I'm not sure either, but if you were wanting to replicate this program and it gives you an error that it cant find "js/components" then you can just replace it with "../../components"
– Shawn Andrews
Nov 20 at 18:23


















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