How can you properly structure chainable functions in Angular?

Question

How can you properly structure chainable functions in Angular?

Recently, I've been working on developing custom functions for my Angular application. Following the official guidelines, I have created an independent library.

My goal is to create chainable functions similar to this:

var obj = {
  test : function(){ 
    console.log('1'); 
    return this; 
  },
  test2 : function(){ 
    console.log('2'); 
    return this; 
  }
}
obj.test().test2();

I'm now wondering how to properly export and import a chainable method in Angular. Additionally, I am unsure about the correct file type to use for these custom functions. Should it be a service, model, or component?

Any advice and insights on this matter would be greatly appreciated. Thank you!

javascript angular typescript

Answer 1

Answer №1

Looking to export and import a chainable method in Angular

If you want to ensure type safety, consider using a class structure:

class CustomObj {
    action1() {
        console.log(1);
        return this;
    }
    action2() {
        console.log(2);
        return this;
    }
}

new CustomObj().action1().action2();

What would be the appropriate file type for storing this custom function? Should it be a service, model, or component?

You can include it in any .ts file. Simply export it like this:

export const customObject = new CustomObj();

Answer 2

Looking to export and import a chainable method in Angular

If you want to ensure type safety, consider using a class structure:

class CustomObj {
    action1() {
        console.log(1);
        return this;
    }
    action2() {
        console.log(2);
        return this;
    }
}

new CustomObj().action1().action2();

What would be the appropriate file type for storing this custom function? Should it be a service, model, or component?

You can include it in any .ts file. Simply export it like this:

export const customObject = new CustomObj();

Answer 3

Answer №2

Explore Library: Underscore.js

If you're open to utilizing a (compact) library, Underscore.js offers the chain() method that allows you to link functions together and retrieve the outcome. By creating a custom function or using an existing one, like a mixin, you can enhance your functionality with your personalized underscore function.

Here's an illustration - take some JSON data, perform mapping, apply a customized function to the elements, and then display the result:

sample code snippet

_.mixin({
  test_logging: function(content) {
    console.log(" * Running test()!");
    console.log({'content': content});
    return content;
  },
  test_message: function(content) {
    return JSON.stringify(content);
  }
});

var output = _.chain(data)
                .map(function(person) {
                    return {
                    'name': person.name,
                    'email': person.email,
                    'company': person.company
                  };
                })
                .test_logging()
                .test_message()
                .value();

Check out this Example on JSFiddle

Answer 4

Explore Library: Underscore.js

If you're open to utilizing a (compact) library, Underscore.js offers the chain() method that allows you to link functions together and retrieve the outcome. By creating a custom function or using an existing one, like a mixin, you can enhance your functionality with your personalized underscore function.

Here's an illustration - take some JSON data, perform mapping, apply a customized function to the elements, and then display the result:

sample code snippet

_.mixin({
  test_logging: function(content) {
    console.log(" * Running test()!");
    console.log({'content': content});
    return content;
  },
  test_message: function(content) {
    return JSON.stringify(content);
  }
});

var output = _.chain(data)
                .map(function(person) {
                    return {
                    'name': person.name,
                    'email': person.email,
                    'company': person.company
                  };
                })
                .test_logging()
                .test_message()
                .value();

Check out this Example on JSFiddle

How can you properly structure chainable functions in Angular?

Answer №1

Answer №2

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