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Q&A How to create Factory Functions instead of using Classes

Instead of classes, I want to use factory functions. Original code with classes: export class MyProject { constructor(title, description, dueDate, priority) { this.title = title; ...

0 answers · posted 3mo ago by Sevenfold‭ · edited 2mo ago by Andreas witnessed the end of the world today‭

Question javascript design-patterns

#3: Post edited by

Andreas witnessed the end of the world today‭ · 2024-10-05T17:53:40Z (2 months ago)
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How to create Factory Functions instead of using Classes

Good day. I'm making a todo list app. Instead of classes, I want to use factory functions.
Original code with classes:
```
export class MyProject {
constructor(title, description, dueDate, priority) {
this.title = title;
this.description = description;
this.dueDate = dueDate;
this.priority = priority;
this.todos = [];
this.projectIndex = null;
this.expandContent = () => expandContent(this);
this.deleteCard = () => deleteCard(this);
this.addTodo = (todoText) => {
this.todos.push(todoText);
this.expandContent();
};
}
}
```
I tried using factory functions:
```
export const MyProject = (title, description, dueDate, priority) => {
let todos = [];
let projectIndex = null;
const expandContent = () => expandContent(this);
const deleteCard = () => deleteCard(this);
const addTodo = (todoText) => {
todos.push(todoText);
expandContent();
}
return {title, description, dueDate, priority, todos, projectIndex, expandContent, deleteCard, addTodo}
};
```
I've acknowledged, that `this` is not necessary in factories, I'm not really sure how not to use them in expandContent and deleteCard functions

Instead of classes, I want to use factory functions.
Original code with classes:
```
export class MyProject {
constructor(title, description, dueDate, priority) {
this.title = title;
this.description = description;
this.dueDate = dueDate;
this.priority = priority;
this.todos = [];
this.projectIndex = null;
this.expandContent = () => expandContent(this);
this.deleteCard = () => deleteCard(this);
this.addTodo = (todoText) => {
this.todos.push(todoText);
this.expandContent();
};
}
}
```
I tried using factory functions:
```
export const MyProject = (title, description, dueDate, priority) => {
let todos = [];
let projectIndex = null;
const expandContent = () => expandContent(this);
const deleteCard = () => deleteCard(this);
const addTodo = (todoText) => {
todos.push(todoText);
expandContent();
}
return {title, description, dueDate, priority, todos, projectIndex, expandContent, deleteCard, addTodo}
};
```
I've acknowledged, that `this` is not necessary in factories, I'm not really sure how not to use them in expandContent and deleteCard functions

#2: Post edited by

Alexei‭ · 2024-10-02T06:25:06Z (3 months ago)
improved tags

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javascript tools

javascript design-patterns

#1: Initial revision by

Sevenfold‭ · 2024-10-02T04:06:17Z (3 months ago)

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How to create Factory Functions instead of using Classes

Good day. I'm making a todo list app. Instead of classes, I want to use factory functions.

Original code with classes:
```
export class MyProject {
    constructor(title, description, dueDate, priority) {
        this.title = title;
        this.description = description;
        this.dueDate = dueDate;
        this.priority = priority;
        this.todos = [];
        this.projectIndex = null;

        this.expandContent = () => expandContent(this);
        this.deleteCard = () => deleteCard(this);
        this.addTodo = (todoText) => {
            this.todos.push(todoText);
            this.expandContent();
        };
    }
}

```
I tried using factory functions:
```
export const MyProject = (title, description, dueDate, priority) => {
    let todos = [];
    let projectIndex = null;

    const expandContent = () => expandContent(this);
    const deleteCard = () => deleteCard(this);
    const addTodo = (todoText) => {
        todos.push(todoText);
        expandContent();
    }

    return {title, description, dueDate, priority, todos, projectIndex, expandContent, deleteCard, addTodo}
};

```
I've acknowledged, that `this` is not necessary in factories, I'm not really sure how not to use them in expandContent and deleteCard functions

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