Is it possible to bring in functions into a typescript class file?

Question

Is it possible to bring in functions into a typescript class file?

In my Typescript classes, the structure often resembles this:

class WordService implements IWordService {

    wordCreatedById: number = 0;
    wordModifiedById: number = 0;

    static $inject = [
        "$http",
        "$q",
        ...
    ];

    constructor(
        public $http: ng.IHttpService,
        public $q: ng.IQService,
        ...
    ) {

    }

    wordClear = (): void => {
        this.word = null;
        this.wordBase = null;
    }

    ...

}

As I continue to add more functions like wordClear, my class files have grown quite lengthy.

I am now wondering if there is a way for me to separate these functions into another file and then import them back into my class?

javascript angularjs typescript

Answer 1

Answer №1

If you're wondering how to incorporate other functions into class definitions, here's one way to do it. Let's create a file called utilFunctions.ts and add the following code:

export function clearWord(obj:{word:any, wordBase:any}/*replace with relevant interface*/) :void {
    obj.word = null;
    obj.wordBase = null;
}

Next, in your class ts file, you can import the utilFunctions module like so:

import * as utilFunctions from './utilFunctions'

class WordService implements IWordService {
    ...
    clearWord = ()=>utilFunctions.clearWord(this);
}

Alternatively, you can define the function within the class itself:

import * as utilFunctions from './utilFunctions'

class WordService implements IWordService {
    ...
    public clearWord() {
        utilFunctions.clearWord(this);
    }
}

Answer 2

If you're wondering how to incorporate other functions into class definitions, here's one way to do it. Let's create a file called utilFunctions.ts and add the following code:

export function clearWord(obj:{word:any, wordBase:any}/*replace with relevant interface*/) :void {
    obj.word = null;
    obj.wordBase = null;
}

Next, in your class ts file, you can import the utilFunctions module like so:

import * as utilFunctions from './utilFunctions'

class WordService implements IWordService {
    ...
    clearWord = ()=>utilFunctions.clearWord(this);
}

Alternatively, you can define the function within the class itself:

import * as utilFunctions from './utilFunctions'

class WordService implements IWordService {
    ...
    public clearWord() {
        utilFunctions.clearWord(this);
    }
}

Is it possible to bring in functions into a typescript class file?

Answer №1

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