Differences between js object attributes through vertices (.) and square brackets ([])

Source: Internet
Author: User
The following small series will introduce the differences between vertices (.) and square brackets ([]) in js object attributes. I think this is quite good. Now I will share it with you and give you a reference. Let's take a look at the query and setting of JS object attributes]

You can use the dot (.) or square brackets ([]) operator to obtain the attribute value. The left side of the operator is an expression that returns an object. For vertices (.), the right side must be a simple identifier named after the property name. For square brackets ([]), square brackets must be an expression that calculates the result as a string. This string is the name of the attribute:

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.