February 2018
Intermediate to advanced
298 pages
8h 22m
English
Content preview from Learn ECMAScript - Second Edition
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Proxies in a nutshell
A proxy acts like a wrapper for an object and defines the custom behavior for the fundamental operations on the object. Some fundamental operations on the objects are property lookup, property assignment, constructor invocation, enumeration, and so on.
Think of it as a basic way of intercepting the operation you do with an object and its associated properties. For example, calling out a property value by writing <objectname>.propertyName should technically just echo out the property value, right?
What if you want to take a step back and inject your control right before the echoing part, but right after the calling part? Here's where proxies come in.
Once an object is wrapped using a proxy, all the operations that are ...
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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.