What is this?

In JavaScript, this is a keyword that refers to the current context of a function or method. It is used to access and modify properties of the current context, and its value is determined by how a function or method is called.

For example, in the global context, this refers to the global object (e.g., window in the browser).

const obj = {
    value: 1,
    getObj() {
        return this;
    }
}
obj.getObj() === obj; // true

function fn() {
    return this;
}
fn() === this; // true; this - global context