Any access to this keyword within a function is actually controlled by how the function is actually called. It is commonly referred to as the calling context.

Here is an example:

function foo() {

foo(); // logs out the global e.g. `window` in browsers
let bar = {
}; // Logs out `bar` as `foo` was called on `bar`

So be mindful of your usage of this. If you want to disconnect this in a class from the calling context use an arrow function, more on that later.

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