Working with Higher Order Functions and Callbacks - What Is Method Chaining, and How Does It Work?

JavaScript
1

Tell us what’s happening:

let obj = {
    value: 1,
    increment: function() {
        this.value++;
        return this;
    },
    double: function() {
        this.value *= 2;
        return this;
    },
    getValue: function() {
        return this.value;
    }
};

let result = obj.increment().double().increment().getValue();
console.log(result);

How can I manage this in my head to understand???
|Are you kidding???

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Challenge Information:

Working with Higher Order Functions and Callbacks - What Is Method Chaining, and How Does It Work?

2

Is there a specific thing that you have questions about? I’m not sure exactly what help you are requesting here

3

I’ve edited your post to improve the readability of the code. When you enter a code block into a forum post, please precede it with three backticks to make it easier to read.

You can also use the “preformatted text” tool in the editor (</>) to add the backticks.

Pre-formatted-text
Pre-formatted-text1356×380 401 KB

See this post to find the backtick on your keyboard.
Note: Backticks (`) are not single quotes (').

4

take it one step at a time, see what increment double and getValue do: increment increases value by 1, double doubles value

so with value starting at 1, and first incrementing, then doubling, then incrementing again, what’s the total?

you can also run the code

5

Does this help you better understand how/why method chaining works?

Method Chaining in JavaScript - GeeksforGeeks