How to use this keyword in JavaScript _ javascript skills

Source: Internet
Author: User
The usage of this keyword in JavaScript is detailed in Object-Oriented Programming Languages and we are very familiar with this keyword. For example, C ++, C #, and Java all provide this keyword. Although it is difficult to start learning, you only need to understand it, it is very convenient and meaningful to use. JavaScript also provides this keyword, but it is much more "messy" than the classic OO language.

Let's take a look at the confusion in the use of this in JavaScript?

1. Use the this keyword in the inline mode of HTML element event attributes:

Pision element



A common method is to use the following format: audio cirpt: EventHandler (this. However, you can write any legal JavaScript statement here. If you are happy to define a class here, You can (but it will be an internal class ). The principle here is that the script engine generates an anonymous member method for the p instance object, and onclick points to this method.

2. Use the this keyword in the event processing function in DOM mode:

The Code is as follows:


Pision element


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.