October 2019
Intermediate to advanced
1200 pages
31h 31m
English
Content preview from Professional JavaScript for Web Developers, 4th Edition
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9Proxies and Reflect
WHAT'S IN THIS CHAPTER?
- Proxy fundamentals
- Proxy traps and reflect methods
- Proxy patterns
Freshly introduced in ECMAScript 6, proxies and reflection are totally new constructs that afford you the ability to intercept and shim additional behavior into fundamental operations within the language. More specifically, you can define a proxy object associated with a target object, and the proxy object can be used as an abstracted target object within which you can control what happens when various operations are performed before they actually reach the target object.
For developers approaching this subject for the first time, this is a fairly nebulous concept paired with a healthy corpus of new terminology. Working through multiple examples will help to cement your understanding.
PROXY FUNDAMENTALS
As mentioned in the chapter introduction, a proxy behaves as an abstraction for a target object. ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.