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Do I have to use a constructor when importing an external module I made in React?


What is the difference between using constructor vs getInitialState in React / React Native?Why do we need middleware for async flow in Redux?React functional stateless component, PureComponent, Component; what are the differences and when should we use what?Extending React component which is imported from a NPM module (typescript)have an error when i try import my component in react nativeConstructor(props) and super(props) VS constructor() and super() in ReactImporting pg in react-native codeIssue importing external modules from component included with react-loadableModalFilterPicker load more on scrollError: The following params are required: Client ID, Client Secret on clarifai api on React






.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;








0















I made a module in react.
So, I imported the module. And then, the function of the external module was called using the constructor.



import connect from './api';
...

class App extends Component
constructor(props)
super(props);

connect(message =>
console.log(message);
);


render()
...




But I would like to express class fields syntax without using a constructor.



import connect from './api';
...

class App extends Component

connect(message =>
console.log(message);
);

render()
...




The results of the above code, 'connect' function is not executed because 'connect' is not declared.



Can't I get an function of external module without a constructor?










share|improve this question






















  • Give a look to the React life cycle component tutorialspoint.com/reactjs/reactjs_component_life_cycle.htm

    – julian salas
    Mar 26 at 19:05

















0















I made a module in react.
So, I imported the module. And then, the function of the external module was called using the constructor.



import connect from './api';
...

class App extends Component
constructor(props)
super(props);

connect(message =>
console.log(message);
);


render()
...




But I would like to express class fields syntax without using a constructor.



import connect from './api';
...

class App extends Component

connect(message =>
console.log(message);
);

render()
...




The results of the above code, 'connect' function is not executed because 'connect' is not declared.



Can't I get an function of external module without a constructor?










share|improve this question






















  • Give a look to the React life cycle component tutorialspoint.com/reactjs/reactjs_component_life_cycle.htm

    – julian salas
    Mar 26 at 19:05













0












0








0








I made a module in react.
So, I imported the module. And then, the function of the external module was called using the constructor.



import connect from './api';
...

class App extends Component
constructor(props)
super(props);

connect(message =>
console.log(message);
);


render()
...




But I would like to express class fields syntax without using a constructor.



import connect from './api';
...

class App extends Component

connect(message =>
console.log(message);
);

render()
...




The results of the above code, 'connect' function is not executed because 'connect' is not declared.



Can't I get an function of external module without a constructor?










share|improve this question














I made a module in react.
So, I imported the module. And then, the function of the external module was called using the constructor.



import connect from './api';
...

class App extends Component
constructor(props)
super(props);

connect(message =>
console.log(message);
);


render()
...




But I would like to express class fields syntax without using a constructor.



import connect from './api';
...

class App extends Component

connect(message =>
console.log(message);
);

render()
...




The results of the above code, 'connect' function is not executed because 'connect' is not declared.



Can't I get an function of external module without a constructor?







reactjs






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Mar 26 at 18:48









SophiaSophia

726 bronze badges




726 bronze badges












  • Give a look to the React life cycle component tutorialspoint.com/reactjs/reactjs_component_life_cycle.htm

    – julian salas
    Mar 26 at 19:05

















  • Give a look to the React life cycle component tutorialspoint.com/reactjs/reactjs_component_life_cycle.htm

    – julian salas
    Mar 26 at 19:05
















Give a look to the React life cycle component tutorialspoint.com/reactjs/reactjs_component_life_cycle.htm

– julian salas
Mar 26 at 19:05





Give a look to the React life cycle component tutorialspoint.com/reactjs/reactjs_component_life_cycle.htm

– julian salas
Mar 26 at 19:05












1 Answer
1






active

oldest

votes


















1














Here is your connect.js:



export const connect = message => 
console.log(message);
;


Here is your component:



import React from 'react';

import connect from './connect';

class App extends React.Component

componentDidMount()
connect('connected');


render()
return (
<div>
<h1>Some Text...</h1>
</div>
);



export default App;


Should be fairly clear... If you have a question ask...






share|improve this answer






















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    1 Answer
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    active

    oldest

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    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    1














    Here is your connect.js:



    export const connect = message => 
    console.log(message);
    ;


    Here is your component:



    import React from 'react';

    import connect from './connect';

    class App extends React.Component

    componentDidMount()
    connect('connected');


    render()
    return (
    <div>
    <h1>Some Text...</h1>
    </div>
    );



    export default App;


    Should be fairly clear... If you have a question ask...






    share|improve this answer



























      1














      Here is your connect.js:



      export const connect = message => 
      console.log(message);
      ;


      Here is your component:



      import React from 'react';

      import connect from './connect';

      class App extends React.Component

      componentDidMount()
      connect('connected');


      render()
      return (
      <div>
      <h1>Some Text...</h1>
      </div>
      );



      export default App;


      Should be fairly clear... If you have a question ask...






      share|improve this answer

























        1












        1








        1







        Here is your connect.js:



        export const connect = message => 
        console.log(message);
        ;


        Here is your component:



        import React from 'react';

        import connect from './connect';

        class App extends React.Component

        componentDidMount()
        connect('connected');


        render()
        return (
        <div>
        <h1>Some Text...</h1>
        </div>
        );



        export default App;


        Should be fairly clear... If you have a question ask...






        share|improve this answer













        Here is your connect.js:



        export const connect = message => 
        console.log(message);
        ;


        Here is your component:



        import React from 'react';

        import connect from './connect';

        class App extends React.Component

        componentDidMount()
        connect('connected');


        render()
        return (
        <div>
        <h1>Some Text...</h1>
        </div>
        );



        export default App;


        Should be fairly clear... If you have a question ask...







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Mar 26 at 19:03









        SakoBuSakoBu

        2,1286 silver badges22 bronze badges




        2,1286 silver badges22 bronze badges


















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