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making modular javascript library by importing class methods without need to the whole class

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-3

I'm trying to make a reusable javascript library for example books class and have createbook, checkforbook, modify book methods

I want to use it like so

import Library, checkForBook, modifyBook from 'books'


Library.createBook(
 name : 'firstbook',
 year: 2012
)


checkForBook('firstBook')

modifyBook('firstBook',
 name: 'secondBook'
)

my problem right now is: how to do it without need to use new keywrod , and how to use methods wihout need to make it like Library.checkForBook
and still have access to the list of books

javascript

share|improve this question

asked Mar 23 at 12:01

mr devmr dev

31

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Add your books script and the current issue that you're facing. Here is a similar question stackoverflow.com/questions/38308307/…
  
  – Harshana
  Mar 23 at 12:19
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Can you post your books module source, please? Are you saying it contains a class?
  
  – Bergi
  Mar 23 at 12:30
  

  
  
  
  

add a comment | 

-3

I'm trying to make a reusable javascript library for example books class and have createbook, checkforbook, modify book methods

I want to use it like so

import Library, checkForBook, modifyBook from 'books'


Library.createBook(
 name : 'firstbook',
 year: 2012
)


checkForBook('firstBook')

modifyBook('firstBook',
 name: 'secondBook'
)

my problem right now is: how to do it without need to use new keywrod , and how to use methods wihout need to make it like Library.checkForBook
and still have access to the list of books

javascript

share|improve this question

asked Mar 23 at 12:01

mr devmr dev

31

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Add your books script and the current issue that you're facing. Here is a similar question stackoverflow.com/questions/38308307/…
  
  – Harshana
  Mar 23 at 12:19
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Can you post your books module source, please? Are you saying it contains a class?
  
  – Bergi
  Mar 23 at 12:30
  

  
  
  
  

add a comment | 

I'm trying to make a reusable javascript library for example books class and have createbook, checkforbook, modify book methods

I want to use it like so

import Library, checkForBook, modifyBook from 'books'


Library.createBook(
 name : 'firstbook',
 year: 2012
)


checkForBook('firstBook')

modifyBook('firstBook',
 name: 'secondBook'
)

my problem right now is: how to do it without need to use new keywrod , and how to use methods wihout need to make it like Library.checkForBook
and still have access to the list of books

javascript

share|improve this question

asked Mar 23 at 12:01

mr devmr dev

31

import Library, checkForBook, modifyBook from 'books'


Library.createBook(
 name : 'firstbook',
 year: 2012
)


checkForBook('firstBook')

modifyBook('firstBook',
 name: 'secondBook'
)

share|improve this question

asked Mar 23 at 12:01

mr devmr dev

31

share|improve this question

asked Mar 23 at 12:01

mr devmr dev

31

asked Mar 23 at 12:01

mr devmr dev

31

asked Mar 23 at 12:01

mr devmr dev

31

2 Answers
2

active

oldest

votes

0

 const books = new Map(); // store the books somehow

 export function createBook( name, year ) // make them available as import createBook from ...
 const book = name, year ;
 books.set(name, book);
 return book;
 

 export function checkForBook(name) 
 return books.has(name);
 

 export function modifyBook(name, update) 
 if(!checkForBook(name))
 throw new Error("Cannot modify, book doesnt exist");
 Object.assign(books.get(name), update);
 

 export default // make them available as Library.createBook
 createBook,
 checkForBook,
 modifyBook
 ;

share|improve this answer

answered Mar 23 at 12:36

Jonas WilmsJonas Wilms

69.7k63764

add a comment | 

0

I think you are looking for

// library.js
export default class Library 
 …

// books.js
import Library from './library';

// creates a singleton:
export default const books = new Library();

export function checkForBook(name) 
 return books.checkForBook(name);

export function modifyBook(name, value) 
 return books.modifyBook(name, value);

// main.js
// imports the singleton, not the `Library` class
import books, checkForBook, modifyBook from 'books';

books.createBook(
 name : 'firstbook',
 year: 2012
);

checkForBook('firstBook');

modifyBook('firstBook', 
 name: 'secondBook'
);

share|improve this answer

answered Mar 23 at 12:34

BergiBergi

386k64601927

add a comment | 

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0

 const books = new Map(); // store the books somehow

 export function createBook( name, year ) // make them available as import createBook from ...
 const book = name, year ;
 books.set(name, book);
 return book;
 

 export function checkForBook(name) 
 return books.has(name);
 

 export function modifyBook(name, update) 
 if(!checkForBook(name))
 throw new Error("Cannot modify, book doesnt exist");
 Object.assign(books.get(name), update);
 

 export default // make them available as Library.createBook
 createBook,
 checkForBook,
 modifyBook
 ;

share|improve this answer

answered Mar 23 at 12:36

Jonas WilmsJonas Wilms

69.7k63764

add a comment | 

0

 const books = new Map(); // store the books somehow

 export function createBook( name, year ) // make them available as import createBook from ...
 const book = name, year ;
 books.set(name, book);
 return book;
 

 export function checkForBook(name) 
 return books.has(name);
 

 export function modifyBook(name, update) 
 if(!checkForBook(name))
 throw new Error("Cannot modify, book doesnt exist");
 Object.assign(books.get(name), update);
 

 export default // make them available as Library.createBook
 createBook,
 checkForBook,
 modifyBook
 ;

share|improve this answer

answered Mar 23 at 12:36

Jonas WilmsJonas Wilms

69.7k63764

add a comment | 

 const books = new Map(); // store the books somehow

 export function createBook( name, year ) // make them available as import createBook from ...
 const book = name, year ;
 books.set(name, book);
 return book;
 

 export function checkForBook(name) 
 return books.has(name);
 

 export function modifyBook(name, update) 
 if(!checkForBook(name))
 throw new Error("Cannot modify, book doesnt exist");
 Object.assign(books.get(name), update);
 

 export default // make them available as Library.createBook
 createBook,
 checkForBook,
 modifyBook
 ;

share|improve this answer

answered Mar 23 at 12:36

Jonas WilmsJonas Wilms

69.7k63764

 const books = new Map(); // store the books somehow

 export function createBook( name, year ) // make them available as import createBook from ...
 const book = name, year ;
 books.set(name, book);
 return book;
 

 export function checkForBook(name) 
 return books.has(name);
 

 export function modifyBook(name, update) 
 if(!checkForBook(name))
 throw new Error("Cannot modify, book doesnt exist");
 Object.assign(books.get(name), update);
 

 export default // make them available as Library.createBook
 createBook,
 checkForBook,
 modifyBook
 ;

share|improve this answer

answered Mar 23 at 12:36

Jonas WilmsJonas Wilms

69.7k63764

answered Mar 23 at 12:36

Jonas WilmsJonas Wilms

69.7k63764

answered Mar 23 at 12:36

Jonas WilmsJonas Wilms

69.7k63764

0

I think you are looking for

// library.js
export default class Library 
 …

// books.js
import Library from './library';

// creates a singleton:
export default const books = new Library();

export function checkForBook(name) 
 return books.checkForBook(name);

export function modifyBook(name, value) 
 return books.modifyBook(name, value);

// main.js
// imports the singleton, not the `Library` class
import books, checkForBook, modifyBook from 'books';

books.createBook(
 name : 'firstbook',
 year: 2012
);

checkForBook('firstBook');

modifyBook('firstBook', 
 name: 'secondBook'
);

share|improve this answer

answered Mar 23 at 12:34

BergiBergi

386k64601927

add a comment | 

0

I think you are looking for

// library.js
export default class Library 
 …

// books.js
import Library from './library';

// creates a singleton:
export default const books = new Library();

export function checkForBook(name) 
 return books.checkForBook(name);

export function modifyBook(name, value) 
 return books.modifyBook(name, value);

// main.js
// imports the singleton, not the `Library` class
import books, checkForBook, modifyBook from 'books';

books.createBook(
 name : 'firstbook',
 year: 2012
);

checkForBook('firstBook');

modifyBook('firstBook', 
 name: 'secondBook'
);

share|improve this answer

answered Mar 23 at 12:34

BergiBergi

386k64601927

add a comment | 

I think you are looking for

// library.js
export default class Library 
 …

// books.js
import Library from './library';

// creates a singleton:
export default const books = new Library();

export function checkForBook(name) 
 return books.checkForBook(name);

export function modifyBook(name, value) 
 return books.modifyBook(name, value);

// main.js
// imports the singleton, not the `Library` class
import books, checkForBook, modifyBook from 'books';

books.createBook(
 name : 'firstbook',
 year: 2012
);

checkForBook('firstBook');

modifyBook('firstBook', 
 name: 'secondBook'
);

share|improve this answer

answered Mar 23 at 12:34

BergiBergi

386k64601927

// library.js
export default class Library 
 …

// books.js
import Library from './library';

// creates a singleton:
export default const books = new Library();

export function checkForBook(name) 
 return books.checkForBook(name);

export function modifyBook(name, value) 
 return books.modifyBook(name, value);

// main.js
// imports the singleton, not the `Library` class
import books, checkForBook, modifyBook from 'books';

books.createBook(
 name : 'firstbook',
 year: 2012
);

checkForBook('firstBook');

modifyBook('firstBook', 
 name: 'secondBook'
);

share|improve this answer

answered Mar 23 at 12:34

BergiBergi

386k64601927

answered Mar 23 at 12:34

BergiBergi

386k64601927

answered Mar 23 at 12:34

BergiBergi

386k64601927