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This article mainly shows you "what is object deconstruction in js", the content is easy to understand, clear, hope to help you solve your doubts, let the editor lead you to study and learn "what is object deconstruction in js" this article.

What is object deconstruction?

Object destructing is a new and more concise way to get or extract values from an object or array. Suppose you have the following objects:

Const employee = {firstName: "Marko", lastName: "Polo", position: "Software Developer", yearHired: 2017}

The early way to get a property from an object is to create a variable with the same name as the object property. This approach is troublesome because we have to create a new variable for each attribute. Suppose we have a large object with many properties and methods, and it would be troublesome to extract attributes in this way.

Var firstName = employee.firstName;var lastName = employee.lastName;var position = employee.position;var yearHired = employee.yearHired

Using deconstruction makes the syntax much simpler:

{firstName, lastName, position, yearHired} = employee

We can also alias the attribute:

Let {firstName: fName, lastName: lName, position, yearHired} = employee

Of course, if the attribute value is undefined, we can also specify the default value:

Let {firstName = "Mark", lastName: lName, position, yearHired} = employee; is all the content of the article "what is object deconstruction in js". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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