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I am seeing some *var self = this;*  or *const self = this;*
Can someone explain why this is being declared in SCA?

<https://developer.mozilla.org/en-US/docs/Glossary/Scope>

`this` is a contextual variable returning the object associated with the current scope

When you enter a function the value of `this` changes to the function. This means if you need access to the outer object, you will need first to assign it a variable name

So our lexical style is to call the variable `self`