18. JavaScript Function Expression
A function expression is another way of creating a function. It makes your code maintainable because each function has its task and it avoids scope pollution - a term used when variables are cluttered within the namespace, thereby making your program more prone to error.
In this tutorial we will focus on function expressions in the following sections:
1. Basic syntaxes of the function expression
2. Ways of creating a function pollution
- Anonymous function
+ Function without function name
+ Self-invoked function
- Arrow function
3. Limitations of arrow functions
- Keywords like this*, *super*, *arguments*, *new.target*, and *yield can't be used.
- Can't be used as a constructor.
- Can't use the syntax of call, apply, and bind methods on arrow functions.
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