Calling A Javascript Function Named In A Variable Duplicate

Have you ever been in a situation where you needed to call a JavaScript function, but its name was stored in a variable, and you were unsure how to execute it? Fear not, as we'll guide you through how to call a JavaScript function named in a variable with ease.

In JavaScript, functions are first-class citizens, meaning you can store them in variables and pass them around like any other data. This flexibility opens up the possibility of calling functions dynamically based on variable values. Let's delve into the steps to achieve this.

To call a JavaScript function named in a variable, follow these steps:

1. Define your JavaScript functions: Suppose you have two functions named `functionOne` and `functionTwo` that you want to call dynamically. Here is a simple representation of these functions:

function functionOne() {
  console.log("Executing Function One");
}

function functionTwo() {
  console.log("Executing Function Two");
}

2. Set up a variable to store the function name: Create a variable, let's say `functionName`, to hold the name of the function you want to call. For example:

let functionName = "functionOne";

3. Call the function using the variable: To call the function dynamically based on the value stored in the `functionName` variable, you can use square brackets like an object property accessor. Here's how you can do it:

window[functionName]();

In this case, if `functionName` holds the value `"functionOne"`, the `functionOne` function will be executed. Similarly, if the `functionName` variable contains `"functionTwo"`, the `functionTwo` function will be called.

4. Verify the output: After calling the function dynamically, check the console to ensure that the correct function is executed based on the value stored in the `functionName` variable.

By following these simple steps, you can dynamically call JavaScript functions based on the names stored in variables, providing you with greater flexibility and control over your code execution.

Remember, when working with dynamic function calls, ensure that the function names stored in variables are valid function names defined in your script. This approach can be particularly useful when building applications that require dynamic behavior or event handling based on user input or specific conditions.

In conclusion, calling a JavaScript function named in a variable is a powerful technique that allows you to enhance the dynamic behavior of your applications. Embrace this method to add flexibility and efficiency to your coding practices. Happy coding!