April 2018
Intermediate to advanced
284 pages
5h 46m
English
Content preview from Simplifying JavaScript
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| Tip 36 | Prevent Context Confusion with Arrow Functions |
In this tip, you’ll learn how to use the arrow function to avoid context errors.
Scope and context are probably the two most confusing concepts for JavaScript developers. A function’s scope, at it simplest, is what variables the functions can access. We explored this previously in Tip 3, Isolate Information with Block Scoped Variables . Now you’re going to learn about context. Context is what the keyword this refers to in a function or class.
Not only are both concepts hard to grasp, but people often confuse them. I know I confuse them all the time. Ryan Morr gives a simple way to remember the difference: Scope pertains to functions and context pertains to objects.[36] While that’s ...
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