What does “.Strategy” do in Node or Passport?












0














What does ".Strategy" do here? Is it Node? Is it Passport?



var LocalStrategy = require('passport-local').Strategy;


Everything up to '.Strategy' part I understand. I just want to know what '.Strategy' does. I have checked the documentation on passport-local module on npm. I have also checked Passport's documentation, and it is just used in code snippets. No explanation is provided.



I am working with the MEAN stack and we are using Passport to authenticate users.










share|improve this question
























  • Did you look at npmjs.com/package/passport-local? Search for "passport strategy"? I seem to be finding a fair bit of documentation.
    – jonrsharpe
    Nov 10 at 18:08










  • Yeah, that's the first place I looked. It doesn't exactly tell me what ".Strategy" does though. Everything leading up to the ".Strategy" part I understand.
    – UhHuhOkSure
    Nov 10 at 18:13










  • What do you mean what it does? You can see the implementation, it's open source. Or look at the abstract version: github.com/jaredhanson/passport-strategy
    – jonrsharpe
    Nov 10 at 18:16










  • I didn't know to look in the local strategy source code because there wasn't anything in the documentation about it. As far as I could tell, it could have been a Node thing or a Passport thing.
    – UhHuhOkSure
    Nov 10 at 18:31










  • But you can see where it's coming from when you require it, what other information would you need to find it? You can see in the index file it comes from strategy.js, which seems logical.
    – jonrsharpe
    Nov 10 at 18:32


















0














What does ".Strategy" do here? Is it Node? Is it Passport?



var LocalStrategy = require('passport-local').Strategy;


Everything up to '.Strategy' part I understand. I just want to know what '.Strategy' does. I have checked the documentation on passport-local module on npm. I have also checked Passport's documentation, and it is just used in code snippets. No explanation is provided.



I am working with the MEAN stack and we are using Passport to authenticate users.










share|improve this question
























  • Did you look at npmjs.com/package/passport-local? Search for "passport strategy"? I seem to be finding a fair bit of documentation.
    – jonrsharpe
    Nov 10 at 18:08










  • Yeah, that's the first place I looked. It doesn't exactly tell me what ".Strategy" does though. Everything leading up to the ".Strategy" part I understand.
    – UhHuhOkSure
    Nov 10 at 18:13










  • What do you mean what it does? You can see the implementation, it's open source. Or look at the abstract version: github.com/jaredhanson/passport-strategy
    – jonrsharpe
    Nov 10 at 18:16










  • I didn't know to look in the local strategy source code because there wasn't anything in the documentation about it. As far as I could tell, it could have been a Node thing or a Passport thing.
    – UhHuhOkSure
    Nov 10 at 18:31










  • But you can see where it's coming from when you require it, what other information would you need to find it? You can see in the index file it comes from strategy.js, which seems logical.
    – jonrsharpe
    Nov 10 at 18:32
















0












0








0







What does ".Strategy" do here? Is it Node? Is it Passport?



var LocalStrategy = require('passport-local').Strategy;


Everything up to '.Strategy' part I understand. I just want to know what '.Strategy' does. I have checked the documentation on passport-local module on npm. I have also checked Passport's documentation, and it is just used in code snippets. No explanation is provided.



I am working with the MEAN stack and we are using Passport to authenticate users.










share|improve this question















What does ".Strategy" do here? Is it Node? Is it Passport?



var LocalStrategy = require('passport-local').Strategy;


Everything up to '.Strategy' part I understand. I just want to know what '.Strategy' does. I have checked the documentation on passport-local module on npm. I have also checked Passport's documentation, and it is just used in code snippets. No explanation is provided.



I am working with the MEAN stack and we are using Passport to authenticate users.







node.js passport.js mean-stack






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 10 at 18:16

























asked Nov 10 at 18:06









UhHuhOkSure

1225




1225












  • Did you look at npmjs.com/package/passport-local? Search for "passport strategy"? I seem to be finding a fair bit of documentation.
    – jonrsharpe
    Nov 10 at 18:08










  • Yeah, that's the first place I looked. It doesn't exactly tell me what ".Strategy" does though. Everything leading up to the ".Strategy" part I understand.
    – UhHuhOkSure
    Nov 10 at 18:13










  • What do you mean what it does? You can see the implementation, it's open source. Or look at the abstract version: github.com/jaredhanson/passport-strategy
    – jonrsharpe
    Nov 10 at 18:16










  • I didn't know to look in the local strategy source code because there wasn't anything in the documentation about it. As far as I could tell, it could have been a Node thing or a Passport thing.
    – UhHuhOkSure
    Nov 10 at 18:31










  • But you can see where it's coming from when you require it, what other information would you need to find it? You can see in the index file it comes from strategy.js, which seems logical.
    – jonrsharpe
    Nov 10 at 18:32




















  • Did you look at npmjs.com/package/passport-local? Search for "passport strategy"? I seem to be finding a fair bit of documentation.
    – jonrsharpe
    Nov 10 at 18:08










  • Yeah, that's the first place I looked. It doesn't exactly tell me what ".Strategy" does though. Everything leading up to the ".Strategy" part I understand.
    – UhHuhOkSure
    Nov 10 at 18:13










  • What do you mean what it does? You can see the implementation, it's open source. Or look at the abstract version: github.com/jaredhanson/passport-strategy
    – jonrsharpe
    Nov 10 at 18:16










  • I didn't know to look in the local strategy source code because there wasn't anything in the documentation about it. As far as I could tell, it could have been a Node thing or a Passport thing.
    – UhHuhOkSure
    Nov 10 at 18:31










  • But you can see where it's coming from when you require it, what other information would you need to find it? You can see in the index file it comes from strategy.js, which seems logical.
    – jonrsharpe
    Nov 10 at 18:32


















Did you look at npmjs.com/package/passport-local? Search for "passport strategy"? I seem to be finding a fair bit of documentation.
– jonrsharpe
Nov 10 at 18:08




Did you look at npmjs.com/package/passport-local? Search for "passport strategy"? I seem to be finding a fair bit of documentation.
– jonrsharpe
Nov 10 at 18:08












Yeah, that's the first place I looked. It doesn't exactly tell me what ".Strategy" does though. Everything leading up to the ".Strategy" part I understand.
– UhHuhOkSure
Nov 10 at 18:13




Yeah, that's the first place I looked. It doesn't exactly tell me what ".Strategy" does though. Everything leading up to the ".Strategy" part I understand.
– UhHuhOkSure
Nov 10 at 18:13












What do you mean what it does? You can see the implementation, it's open source. Or look at the abstract version: github.com/jaredhanson/passport-strategy
– jonrsharpe
Nov 10 at 18:16




What do you mean what it does? You can see the implementation, it's open source. Or look at the abstract version: github.com/jaredhanson/passport-strategy
– jonrsharpe
Nov 10 at 18:16












I didn't know to look in the local strategy source code because there wasn't anything in the documentation about it. As far as I could tell, it could have been a Node thing or a Passport thing.
– UhHuhOkSure
Nov 10 at 18:31




I didn't know to look in the local strategy source code because there wasn't anything in the documentation about it. As far as I could tell, it could have been a Node thing or a Passport thing.
– UhHuhOkSure
Nov 10 at 18:31












But you can see where it's coming from when you require it, what other information would you need to find it? You can see in the index file it comes from strategy.js, which seems logical.
– jonrsharpe
Nov 10 at 18:32






But you can see where it's coming from when you require it, what other information would you need to find it? You can see in the index file it comes from strategy.js, which seems logical.
– jonrsharpe
Nov 10 at 18:32














1 Answer
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oldest

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If you look at the sources of passport-local index.js you'll see it exports the same thing directly and in exports.Strategy.



When you do require('passport-local).Strategy you import the export defined in exports.Strategy, but it's really the same to do just require('passport-local') in this case because the same constructor is exported directly from the module.



If you define a module like this:



var Thing = { foo: () => 'bar' };

exports = module.exports = Thing;

exports.Thing = Thing;


you can use it in many ways:



const Thing = require('./module');
console.log(Thing.foo());


works, as does



const Thing = require('./module').Thing;
console.log(Thing.foo());


and with both imports you can actually call also



console.log(Thing.Thing.foo());


If you remove the exports.Thing = Thing; part of the module, then



const Thing = require('./module').Thing;


does not work anymore.



The exports cause confusion often. You could take a look of Node docs or eg. this answer.






share|improve this answer





















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    0














    If you look at the sources of passport-local index.js you'll see it exports the same thing directly and in exports.Strategy.



    When you do require('passport-local).Strategy you import the export defined in exports.Strategy, but it's really the same to do just require('passport-local') in this case because the same constructor is exported directly from the module.



    If you define a module like this:



    var Thing = { foo: () => 'bar' };

    exports = module.exports = Thing;

    exports.Thing = Thing;


    you can use it in many ways:



    const Thing = require('./module');
    console.log(Thing.foo());


    works, as does



    const Thing = require('./module').Thing;
    console.log(Thing.foo());


    and with both imports you can actually call also



    console.log(Thing.Thing.foo());


    If you remove the exports.Thing = Thing; part of the module, then



    const Thing = require('./module').Thing;


    does not work anymore.



    The exports cause confusion often. You could take a look of Node docs or eg. this answer.






    share|improve this answer


























      0














      If you look at the sources of passport-local index.js you'll see it exports the same thing directly and in exports.Strategy.



      When you do require('passport-local).Strategy you import the export defined in exports.Strategy, but it's really the same to do just require('passport-local') in this case because the same constructor is exported directly from the module.



      If you define a module like this:



      var Thing = { foo: () => 'bar' };

      exports = module.exports = Thing;

      exports.Thing = Thing;


      you can use it in many ways:



      const Thing = require('./module');
      console.log(Thing.foo());


      works, as does



      const Thing = require('./module').Thing;
      console.log(Thing.foo());


      and with both imports you can actually call also



      console.log(Thing.Thing.foo());


      If you remove the exports.Thing = Thing; part of the module, then



      const Thing = require('./module').Thing;


      does not work anymore.



      The exports cause confusion often. You could take a look of Node docs or eg. this answer.






      share|improve this answer
























        0












        0








        0






        If you look at the sources of passport-local index.js you'll see it exports the same thing directly and in exports.Strategy.



        When you do require('passport-local).Strategy you import the export defined in exports.Strategy, but it's really the same to do just require('passport-local') in this case because the same constructor is exported directly from the module.



        If you define a module like this:



        var Thing = { foo: () => 'bar' };

        exports = module.exports = Thing;

        exports.Thing = Thing;


        you can use it in many ways:



        const Thing = require('./module');
        console.log(Thing.foo());


        works, as does



        const Thing = require('./module').Thing;
        console.log(Thing.foo());


        and with both imports you can actually call also



        console.log(Thing.Thing.foo());


        If you remove the exports.Thing = Thing; part of the module, then



        const Thing = require('./module').Thing;


        does not work anymore.



        The exports cause confusion often. You could take a look of Node docs or eg. this answer.






        share|improve this answer












        If you look at the sources of passport-local index.js you'll see it exports the same thing directly and in exports.Strategy.



        When you do require('passport-local).Strategy you import the export defined in exports.Strategy, but it's really the same to do just require('passport-local') in this case because the same constructor is exported directly from the module.



        If you define a module like this:



        var Thing = { foo: () => 'bar' };

        exports = module.exports = Thing;

        exports.Thing = Thing;


        you can use it in many ways:



        const Thing = require('./module');
        console.log(Thing.foo());


        works, as does



        const Thing = require('./module').Thing;
        console.log(Thing.foo());


        and with both imports you can actually call also



        console.log(Thing.Thing.foo());


        If you remove the exports.Thing = Thing; part of the module, then



        const Thing = require('./module').Thing;


        does not work anymore.



        The exports cause confusion often. You could take a look of Node docs or eg. this answer.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Dec 5 at 20:35









        vesse

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