Could someone help me understand this JavaScript code where a function takes an object as a formal parameter?

Within a Vue component's methods, I came across the following code snippet defining a function:

methods: {
   onEditorChange({ editor, html, text }) {
        console.log('editor change!', editor, html, text)
        this.content = html
   }
}

I tested the code and confirmed it is functioning as expected. Is it common practice to declare formal parameters in a function like that? The specific implementation can be found at https://github.com/surmon-china/vue-quill-editor

Answer №1

This concept is referred to as Structured Unpacking.

Found at: http://www.example.com/unpacking-article

In previous versions of ECMAScript, the selectEntries() function would be written like this:

function selectEntries(options) {
    options = options || {};
    var start = options.start || 0;
    var end = options.end || getDbLength();
    var step = options.step || 1;
    ···
}

With ECMAScript 6, you can utilize structured unpacking, demonstrated in the following code snippet:

function selectEntries({ start=0, end=-1, step=1 }) {
    ···
};

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