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This is because the object keys are not necessarily in a particular order.If you want to assign values of an object to new keys instead of using the name of the existing object keys, you can do the following:Just like array destructuring, the default values can also be used in object destructuring:You can also set default values when you assign value to a new variable:The computed property name is another ES6 feature that also works for object destructuring. web development. Destructuring is a JavaScript expression that makes it possible to unpack values from arrays, or properties from objects, into distinct variables. Get started If we want to extract data from arrays, it's quite simple using the destructuring assignment. Let's look into more detail how this works. Build better business websites, faster. Array Destructuring. Imagine we want extract data from an array. Learn to code for free. Let's skip the first and third item on the list. You have to define the same nesting structure at the left side of the assignment to extract values from deeper objects:Just like arrays, you can also destructure a part of the object and assign the rest of the object to a new variable: Instead of going through that repetitive process, we'd do this:Variables can be declared before being assigned like this:Notice that the variables are set from left to right. thousands of freeCodeCamp study groups around the world. developers. Create an online course & earn a full-time income on the platform Destructuring is extremely useful when you don't want to pass the object or the array to a function as a whole, but rather as individual pieces. How would we do this?So the comma separator does the magic. write about modern JavaScript, Node.js, Spring Boot, core Java, RESTful APIs, and all things Prior to ES6, how would this be done?See how tedious it is to extract all the data. Notice that instead of having just one comma, we have three. So the first variable gets the first item in the array, the second variable gets the second variable in the array, and so on.What if we want to get the first and last item on our array instead of the first and second item, and we want to assign only two variables? We also have Let's refer to our first example for arrays. Diese Fähigkeit ist so ähnlich wie in den Sprachen Perl und Python. You can specify the name of a property via an expression if you put it in square brackets:Arrays can also be used with objects in object destructuring:The rest syntax can also be used to pick up property keys that are not already picked up by the destructuring pattern. Start with a Our mission: to help people learn to code for free. It allows the names of the object properties in JavaScript object literal notation to be computed dynamically.Here is an example that computes the name of the object property by using "Computed Property Name" notation:The object destructuring also works for the arrays present inside the object as values:The object may contain nested objects when destructuring. videos, articles, and interactive coding lessons - all freely available to the public. Destructuring automatically assigns default values to extra variables:The destructuring assignment can also be used to swap the values of two variables:The destructuring assignment also works with JavaScript objects. We have to repeatedly do the same thing. Say we want to extract data from an object and assign to new variables. I love sharing knowledge so I write about things I learn and things I need to learn. Let us see how it is done in the following examples.The array destructuring syntax automatically creates variables with the values from the corresponding items in an array:The unwanted items of the array can be skipped by using an extra comma and leaving the variable names empty:You can even choose to destructure a part of the array, and assign the rest of the array to a new variable:What if you want to assign the array's values to an object? Without coding. I