What is the purpose of the "this" keyword in JavaScript?

Question

AI Bootstrap Builder · Accepted Answer

The "this" keyword in JavaScript refers to the context in which a function is executed, allowing access to properties and methods of the object it belongs to. It is dynamic and can change depending on how a function is called.


        const person = {
            name: "Alice",
            greet: function() {
                console.log("Hello, my name is " + this.name);
            }
        };

        person.greet(); // Output: Hello, my name is Alice

ADDITIONAL COMMENT: - In the example, "this" refers to the "person" object, allowing access to its "name" property. - The value of "this" is determined by the call-site, which is where the function is invoked. - In a method, "this" refers to the object the method is called on. - In global functions, "this" refers to the global object (window in browsers) unless in strict mode, where it is undefined. ✅ Answered with JavaScript best practices.

What is the purpose of the "this" keyword in JavaScript?

Asked on Jul 09, 2024

Answer