Call Javascript Object Method With A Variable

So you're diving into the world of JavaScript and looking to call a method on an object using a variable? You've come to the right place! This handy trick can be very useful in your coding adventures. Let's walk through how you can call a JavaScript object method with a variable.

First things first, let's make sure we have a clear understanding of what an object method is. In JavaScript, objects are collections of key-value pairs, where the values can be functions. These functions, when defined as values in an object, are known as methods. The beauty of using methods is that they allow you to perform specific actions on the object's data.

Now, back to the main topic - calling a method with a variable. This technique can be handy when you need to dynamically determine which method to call based on certain conditions or inputs. Here's a simple example to illustrate this concept:

const object = {
  method1() {
    console.log("This is method 1");
  },
  method2() {
    console.log("This is method 2");
  }
};

const methodName = "method1";
object[methodName](); // Output: This is method 1

In the code snippet above, we have an object called `object` with two methods `method1` and `method2`. We store the method name we want to call in the `methodName` variable and then use square brackets notation `object[methodName]()` to call the method dynamically.

It's crucial to ensure that the variable holding the method name matches the actual method name defined in the object. If there's a mismatch, JavaScript will throw an error indicating that the method is not a function.

One important thing to note is that the method name stored in the variable should be a string that exactly matches the method name in the object. You cannot directly pass the method name without enclosing it in quotes when using the square brackets notation.

Feel free to take this concept further by incorporating it into more complex scenarios in your coding projects. Experiment with different objects, methods, and variables to see the versatility of this approach.

In conclusion, calling a JavaScript object method with a variable opens up a world of possibilities in your coding journey. It gives you the flexibility to choose which method to invoke dynamically, adding a layer of dynamism to your code. Remember to pay attention to the method names, use quotes around the variable storing the method name, and have fun exploring the endless ways you can leverage this technique in your projects. Happy coding!